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Journal articles on the topic 'Autodesk Simulation CFD'
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Albatayneh, Aiman, Dariusz Alterman, Adrian W. Page, and Behdad Moghtaderi. "WARMING ISSUES ASSOCIATED WITH THE LONG TERM SIMULATION OF HOUSING USING CFD ANALYSIS." Journal of Green Building 11, no. 2 (March 2016): 57–74. http://dx.doi.org/10.3992/jgb.11.2.57.1.
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The determination of internal building air temperature has an impact on the design and performance of a building in measuring thermal comfort and heating and cooling loads. There is software to assist with measuring internal building air temperature such as Autodesk CFD simulation. However, the use of Autodesk CFD simulation for the analysis appears to have an issue with simulations extending over a long term (i.e. months or years) as the internal air temperature in a building keeps rising with time. This paper addresses the challenges encountered using CFD simulation in the modelling of a building for long term performance. A new method to overcome the issue of the progressive rising of internal air temperature using two external air boundaries, one for the external volume (sky boundary) and the other surrounding the building, is suggested in the paper.
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Alexa, Vasile, Imre Kiss, and Sorin Raţiu. "Verofocation of Bernoulli Law using the Software Autodesk Simulation CFD." Analecta Technica Szegedinensia 8, no. 2 (May 12, 2014): 120–27. http://dx.doi.org/10.14232/analecta.2014.2.120-127.
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Using Fluid Dynamics Analysis (CFD) provides the opportunity to achieve a faster and more thorough study of fluid flow processes and is an important step to obtain information that cannot be obtained otherwise. The finite element method is generally more accurate than the finite volume method, but finite volume method can achieve more accurate mass balances using the balance sheet continuity per volume control. Finite volume method is more appropriate when fluid transport, while the finite element method is used more in the calculations of tension or conduction, which satisfies local continuity condition, is of less importance. Fluid Dynamics Analysis (CFD) is used in numerical analyzes, based on a set of mathematical expressions on linear complex equations defining fundamental fluid flow and heat transfer. This paper presents the simulation of air flow through a tube of special construction in interpreting the law of Bernoulli energy. Laboratory systems are shown, respectively simulating the actual fluid flow.
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Thamrin, I., I. Yani, F. H. Yusuf, Z. Abidin, and T. Maseko. "Temperature distribution simulation on Aluminum incineration furnace using Autodesk simulation mechanical CFD 2018." IOP Conference Series: Materials Science and Engineering 857 (June 23, 2020): 012016. http://dx.doi.org/10.1088/1757-899x/857/1/012016.
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Ancas, Ana Diana, Florin-Emilian Turcanu, Mihai Profire, Marina Verdes, and Marius Costel Balan. "Indoor Climate Simulation in a Church During Winter Season." Journal of Applied Engineering Sciences 9, no. 1 (May 1, 2019): 25–28. http://dx.doi.org/10.2478/jaes-2019-0003.
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Abstract In the paper is presented a heating system installed in church and the interior climate generated. Thermal Comfort is the purpose of each designer, since the design stage and has to be ensure for the churchgoers, but even for the interior finishes. The heating system that uses hydronic radiators is evaluated trough the CFD modelling, in order to evaluate pro and contra arguments. The simulation has been made in a 3d simulation software environment, in Autodesk CFD with good results.
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Madej, Jerzy, and Bartłomiej Będkowski. "AIR FLOW ANALYSIS FOR ELECTRICAL MOTOR'S COOLING SYSTEM WITH AUTODESK SIMULATION CFD 2013 PROGRAM." Acta Mechanica et Automatica 7, no. 2 (June 1, 2013): 89–92. http://dx.doi.org/10.2478/ama-2013-0016.
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Abstract In the article the analysis of airflow through electrical motor was conducted and optimal design solution was chosen in order to increase cooling efficiency. Numerical simulations allow to determine the areas of temperature occurrence which may have destructive influence on electrical motor parts and on its safe operation. The numerical calculations of airflow was carried out for two different types of fans as well as for two different housings. An analysis of the construction was carried out by CFD method using Autodesk Simulation CFD 2013. Community results of the analysis, we can conclude that the better solution for machines with fixed direction of rotation is to use instead of the radial the axial fan. For axial fan the motor temperature in the same condition was lower by about 5°C.
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Harun, Zambri, Muhammad Saiful bin Sahari, and Taib Iskandar Mohamad. "Smoke Simulation in an Underground Train Station Using Computational Fluid Dynamic." Applied Mechanics and Materials 663 (October 2014): 366–72. http://dx.doi.org/10.4028/www.scientific.net/amm.663.366.
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The design of the ventilation and fire safety systems for the Johor Bahru Sentral, a semi-underground train station, part of the Integrated Custom, Immigration and Quarantine Complex (ICIQ) is based on normal Malaysian Standards (MS), British Standards and the local fire department’s requirements. However, the large and complex space in the underground station coupled with scheduled diesel-powered locomotives which frequent the station by stopping or passing require detailed simulations. Both ventilation and the fire safety systems employ Computational Fluid Dynamic (CFD) methods to provide realistic balance against the typical calculations based on spread sheets and certain design software. This study compares smoke simulations results performed by the mechanical and fire consultants with the simulations carried out through this project. An assumption of a locomotive catches fire near the main platform is made. The burning locomotive is the source of the smoke while the occupants on platforms and waiting areas are the subjects to escape safely. The process of the simulation includes modelling and meshing processes on the structure of the railway station imported from Inventor CAD Autodesk software drawing. The CFD simulations are performed using Star-CCM+. The smokes flow around the building with buoyancy forces and extracted via exhaust fans. Through these simulations, we found that when a locomotive catches fire, the passengers could evacuate the building safely before the fire department machinery arrives. Furthermore, we notice that the ventilation fans activation based on detection of hazardous gases may not be efficient way to remove the latter. A schedule clean-up sync with train arrivals effectively removes toxic gas.
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Ielina, Tetiana, Liudmyla Halavska, Daiva Mikucioniene, Rimvydas Milasius, Svitlana Bobrova, and Oksana Dmytryk. "Development of 3D Models of Knits from Multi-Filament Ultra-Strong Yarns for Theoretical Modelling of Air Permeability." Materials 14, no. 13 (June 23, 2021): 3489. http://dx.doi.org/10.3390/ma14133489.
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The work is devoted to the study of the geometric parameters of a knitted loop. It has been found that the optimal model is a loop model detailed at the yarn level, which considers the change in the cross-sectional shape and sets the properties of the porous material in accordance with the internal porosity of the yarn. A mathematical description of the coordinates of the characteristic points of the loop and an algorithm for calculating the coordinates of the control vertices of the second order spline, which determine the configuration of the yarn axes in the loop, are presented in this work. To create 3D models, Autodesk AutoCAD software and Structura 3D software, developed in the AutoLisp programming language, were used. The simulation of the air flow process was carried out in the Autodesk CFD Simulation environment. For the experimental investigation, plane knits from 44 tex × 3 linear density ultra-high molecular weight polyethylene yarns were produced, and their air permeability was tested according to Standard DSTU ISO 9237:2003. The results obtained during the laboratory experiment and simulation differed by less than 5%.
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Kenickel Nunes, Beatriz, Silvia Regina Lucas de Souza, Arilson José de Oliveira Júnior, Enedy Allan Rodrigues Cordeiro, and Reginaldo Apolinário de Almeida. "A FLUIDODINÂMICA COMPUTACIONAL UTILIZADA PARA MAPEAR O CONFORTO TÉRMICO DE SUÍNOS NA FASE DE MATERNIDADE." ENERGIA NA AGRICULTURA 32, no. 1 (June 10, 2017): 32. http://dx.doi.org/10.17224/energagric.2017v32n1p32-39.
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As observações geradas em estudos sobre instalações de suínos têm demonstrado que o desempenho térmico das instalações comumente utilizadas pelos produtores vem apresentando um quadro de desconforto térmico na fase da maternidade, devido às adaptações construtivas feitas com a finalidade de atender tanto as necessidades da matriz quanto dos leitões. Sendo assim, o objetivo deste trabalho foi utilizar a ferramenta de fluidodinâmica computacional (CFD) para realizar o mapeamento do microambiente de duas instalações de suínos, visando o bem-estar dos animais. As simulações foram obtidas em uma maternidade da Fazenda Experimental Lageado, UNESP, Botucatu/SP e de uma granja comercial localizada em Santa Cruz do Rio Pardo/SP. Para as simulações utilizou-se o software Autodesk® CFD Simulation juntamente com o AutoCAD 3D, para desenho das instalações. As condições de conforto térmico foram analisadas por meio da aplicação do índice de voto médio estimado – PMV. Na instalação comercial simulada observou-se que as aberturas laterais não são suficientes para manter uma condição de conforto térmico, segundo o índice PMV. Com o uso da fluidodinâmica computacional foi possível modificar o ambiente mediante a elevação do seu fluxo de ar, o que demonstrou ser uma solução na diminuição da temperatura do ar e alcance de uma condição de conforto térmico.PALAVRAS-CHAVE: Conforto térmico, bem-estar de suínos, fluidodinâmica computacional, CFD, simuladores. FLUIDODYNAMICS COMPUTATIONAL USED FOR THE MAPPING OF THERMAL CONDITIONS IN INSTALLATION OF SWINE MATERNITIESABSTRACT: Studies have shown that the thermal performance of facilities commonly used by producers has presented an environmental discomfort picture in the maternity phase due to constructive adjustments made in order to meet needs of both piglets and sow. Therefore, this work aimed to use the computational fluid dynamic tool for mapping the microclimate of two facilities, which purpose of improving the animal welfare. The simulations were conducted at experimental farm “Lageado”, UNESP, Botucatu/SP and a commercial facility, located in Santa Cruz do Rio Pardo/SP. For simulations were used the Autodesk® CFD Simulation software along with AutoCAD 3D (facilities design). Thermal comfort conditions were analyzed by means of predicted mean vote – PMV. In simulated commercial facility was observed that side vents are not sufficient to establish a thermal comfort condition, according to PMV. With computational fluid dynamic was possible to change the environment through air flow increase, showing to be a solution in decrease of air temperature and reach of thermal comfort condition.KEYWORDS: Thermal comfort, swine welfare, computational fluid dynamic, CFD, simulators.
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Puzanov, A. V. "Transdisciplinary models of hydraulic drives of mobile machinery." «System analysis and applied information science», no. 4 (February 6, 2019): 51–55. http://dx.doi.org/10.21122/2309-4923-2018-4-51-55.
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Modern drive engineering requires a comprehensive analysis of all work processes in hydraulic drives, solving the problems of modeling the technological processes of their production using mathematical and software tools of various physicality.The article proposes an approach to the development of hydrodrives of mobile equipment based on transdisciplinary models of instruments and control systems. These models are designed to unite in a single information space a methodical and mathematical apparatus of various physicality: mechanics, kinematic, hydromechanics, heat engineering, and methods for their solution. These measures will increase their adequacy, reduce assumptions and reduce the safety factor as a measure of imperfection of the scientific and technical understanding of the facility.The article gives an example of the use of this approach in the development of volumetric hydraulic drives of mobile equipment a technique for calculating the indicator diagram of an axial-plunger hydraulic machine at a micro level using the Matlab / Simulink, Autodesk Simulation CFD and Autodesk Simulation Mechanical software complexes. The indicator diagram of the hydraulic machine is a clear characteristic of the dynamic qualities of the product. From the correctness of the calculation of this characteristic, the dynamic properties, reliability and resource of the drive as a whole depend.
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Labastid, Dayberto, Marco Bolobosky, Luis Mogollón, and Arthur James. "Implementación de un Intercambiador de Calor en Techos de Zinc." KnE Engineering 3, no. 1 (February 11, 2018): 747. http://dx.doi.org/10.18502/keg.v3i1.1478.
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The research aims to develop a compact prototype with low visual impact that is able to take advantage of solar energy to heat water collected from rain. The methodology used involves a study of the art of these systems, which was complemented by a research of related patents. The mathematical concepts governing heat transfer for these types of systems were analyzed and then simulated in Autodesk CFD. We also rely on the TRNSYS simulation software to estimate the temperature values that can reach Zinc roofs under tropical climatic conditions such as Panama. The system was built and tested, obtaining results such as reaching temperatures in the water very close to the surface temperatures of zinc. The decrease in the amount of heat entering the residence was also visualized.Keywords: heat exchanger, Solar Energy, Water Heater, Rainwater harvesting, Zinc Roof
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Albatayneh, Aiman, Dariusz Alterman, Adrian Page, and Behdad Moghtaderi. "The Significance of Sky Temperature in the Assessment of the Thermal Performance of Buildings." Applied Sciences 10, no. 22 (November 13, 2020): 8057. http://dx.doi.org/10.3390/app10228057.
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Energy-efficient building design needs an accurate way to estimate temperature inside the building which facilitates the calculation of heating and cooling energy requirements in order to achieve appropriate thermal comfort for occupants. Sky temperature is an important factor for any building assessment tool which needs to be precisely determined for accurate estimation of the energy requirement. Many building simulation tools have been used to calculate building thermal performance such as Autodesk Computational Fluid Dynamics (CFD) software, which can be used to calculate building internal air temperature but requires sky temperature as a key input factor for the simulation. Real data obtained from real-sized house modules located at University of Newcastle, Australia (southern hemisphere), were used to find the impact of different sky temperatures on the building’s thermal performance using CFD simulation. Various sky temperatures were considered to determine the accurate response which aligns with a real trend of buildings’ internal air temperature. It was found that the internal air temperature in a building keeps either rising or decreasing if higher or lower sky temperature is chosen. This significantly decreases the accuracy of the simulation. It was found that using the right sky temperature values for each module, Cavity Brick Module (CB) Insulated Cavity Brick Module (InsCB), Insulated Brick Veneer Module (InsBV) and Insulated Reverse Brick Veneer Module (InsRBV), will result in 6.5%, 7.1%, 6.2% and 6.4% error correspondingly compared with the real data. These errors mainly refer to the simulation error. On the other hand using higher sky temperatures by +10 °C will significantly increase the simulation error to 16.5%, 17.5%, 17.1% and 16.8% and lower sky temperature by +10 °C will also increase the error to 19.3%, 22.6%, 21.9% and 19.1% for CB, InsCB, InsBV and InsRBV modules, respectively.
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Abu, Rahaman, K. A. Oladejo, A. O. Popoola, K. T. Oriolowo, and K. M. Odunfa. "Design and Simulation of Air Conditioning System in a Large Auditorium Based on Computational Fluid Dynamics." European Journal of Engineering Research and Science 5, no. 9 (September 29, 2020): 1117–23. http://dx.doi.org/10.24018/ejers.2020.5.9.2062.
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Air conditioning system is an indispensable part of buildings today. The cost of this system increases with the rise in energy consumption which poses a challenge as well as air distribution in large auditoria. Analysis of results can also be daunting when designing this system. The study focuses on designing an air conditioning system in a large auditorium, applying Computational Fluid Dynamics (CFD) and visualizing the result in a Virtual Reality (VR) environment. The 3-dimensional model of the 520-capacity Technology Lecture Theatre, University of Ibadan, Nigeria was drawn with Autodesk Revit and modified into the geometry applicable for Displacement Ventilation (DV) and Mixed Ventilation (MV) for ease of numerical analysis with ANSYS Fluent. The building model and simulation results were then imported into Unity software for visualization in VR. The DV achieved better thermal comfort and air distribution in the computer simulation. At a supply temperature of 292.15 K, the DV system was able to keep the auditorium temperature at about 296.50 K, while the MV system at a supply temperature of 289.15 K was only able to maintain the temperature at 295.40 K. The temperature profile showed that the lower region where the students were seated was colder in DV compared to MV by at least 3 K. The results were also observed from a convenient position in VR. This study, with the aid of CFD and VR, was able to establish that displacement ventilation design has better air flow, lower energy consumption and is efficient for an air conditioning system in a large auditorium.
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Amri, Siti Belinda, and La Ode Abdul Syukur. "ANALISIS ALIRAN ANGIN PADA ATAP MIRING MELALUI UJI SIMULASI FLOW DESIGN." LANGKAU BETANG: JURNAL ARSITEKTUR 4, no. 2 (December 28, 2017): 136. http://dx.doi.org/10.26418/lantang.v4i2.23252.
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Bidang penelitian tentang aliran angin pada bangunan sangat penting baik untuk perencanaan bangunan maupun pemukiman. Aliran angin yang mempengaruhi bangunan memiliki dampak pada ketahanan struktural terhadap angin. Penelitian dilakukan untuk mengetahui nilai drag coefficient atau gaya hambat terhadap angin yang dihasilkan pada atap miring dengan nilai sudut yang berbeda. Metode yang digunakan adalah dengan menguji model atap melalui simulasi CFD (Computational Fluid Dynamic) pada software Autodesk Flow Design. Hasil uji lima atap miring dengan nilai 0o, 15o, 30o, 45o, dan 60o menujukkan bahwa semakin besar sudut atap maka semakin besar luas bidang atap yang bersentuhan dengan aliran angin datang, hal ini sejalan dengan nilai average drag coefficient yang dihasilkan. Atap dengan sudut 60o memiliki luas bidang atap dan nilai average drag coefficient yang tertinggi diantara kelima sudut atap yang diuji, dengan nilai luas 72 m2 menghasilkan nilai average drag coefficient sebesar 1,4. Bangunan dengan nilai drag coefficient yang tinggi memiliki resiko kerusakan struktur yang tinggi akibat angin karena memiliki bentuk yang kurang aerodinamis.Kata-kata Kunci: aliran angin, atap miring, Flow Design, drag coefficient.ANALYSIS OF WIND FLOW PATTERN ON SLOPED ROOF USING FLOW DESIGN SIMULATIONThe field of research on wind flow on buildings is important for both building planning and planning a residential areas. Wind flow affecting the building has an impact on structural resistance to the wind. The study was conducted to find out the value of drag coefficient or drag force against the wind generated on the sloped roof with different angle values. The method applied by tested the roof model through CFD (Computational Fluid Dynamic) simulation through Autodesk Flow Design software. The test results of five sloped roofs with angle 0o, 15o, 30o, 45o, and 60o showed that the higher the angle of the roof, the larger the area of the roof in contact with the approaching wind flow. This is in line with the average drag coefficient value generated. The roof with an angle of 60o has a large roof area and the highest average drag coefficient among the five tested roof angles, with an area of 72 m2 yields and average drag coefficient of 1.4. Buildings with high drag coefficient value have a high risk of structural damage due to wind because it has a less aerodynamic shape.Keywords: wind flow, sloped roof, Flow Design, drag coefficient REFERENCESAutodeks Help (2015), Get Started With Autodesk Flow Design, https://www.autodesk.com/products/flow-design/overview (diakses tanggal 5 November 2017)Bhandari NM, Krishna P. (2011) An Explanatory handbook on proposed IS- 875 (Part 3): Wind loads on buildings and structure. IITK-GSDMA Project on Building Codes.Boutet, T. (1987). Controlling Air Movement. New York: McGraw Hill.Chung, TJ., (2010), Computational Fluid Dynamic. Cambridge: Cambidge University Press.Driss, S., Driss, Z., & Kammoun, I. K. (2014). Impact of Shape of Obstacle Roof on the Turbulent Flow in a Wind Tunnel. American Journal of Energy Research, 90-98.Groat, Linda N., David Wang (2002), Architectural Research Methods, New York: John Wiley and Sons.Guirguis, N., El-Aziz, A. A., & Nassief, M. (2007). Study of wind effects on different buildings of pitched roofs. Desalination, 190–198.Lechner, N. (2007). Heating, Cooling, Lighting: Metode Desain untuk Arsitektur. Jakarta: Rajawali.Lippsmeier, G. (1997). Bangunan Tropis. Jakarta: Erlangga.Mujiasih, S., & Primadi S.T., (2014), Analisis Kejadian Puting Beliung Tanggal 11 Desember 2013 di Wilayah Denpasar Bagian Selatan–Bali, Prosiding Workhop Operasional Radar dan Satelit Cuaca, Jakarta: BMKG.Stathopoulos and B.A. Baskaran, (1996) “Computer simulation of wind environmental conditions around buildings”, Engineering Structures, 18(11), 876-885.Szokolay, N. V. (1980). Environmental Science Handbook. New York: Wiley.Tominaga, Y., Akabayashi, S., Kitahara, T., & Arinami, Y. (2015). Air flow around isolated gable-roof building with different roof pitches: Wind Tunnel experiments and CFD Simulation. Building and Environment, 204-213.
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Kordana, Sabina, Kamil Pochwat, Daniel Słyś, and Mariusz Starzec. "Opportunities and Threats of Implementing Drain Water Heat Recovery Units in Poland." Resources 8, no. 2 (May 5, 2019): 88. http://dx.doi.org/10.3390/resources8020088.
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In recent years an increase of interest in usage of renewable energy sources as a substitution of fossil fuels is being noticeable. However, the waste heat potential, which can be used as an additional source of energy for heating water in buildings, is being omitted. The sources of this heat can be grey water discharged from such sanitary facilities as showers or washing machines. In response to this issue, we took on the task to define and analyze key factors affecting the development of DWHR (Drain Water Heat Recovery) systems using PESTLE (political, economic, social, technological, legal and environmental) analysis. The strengths and weaknesses of these systems were also identified. The studies were based on CFD (computational fluid dynamics) modeling tools. In the Autodesk Simulation CFD software environment, a DWHR unit was made, which was then analyzed for heat exchange efficiency. The obtained results were the basis for preparing the strategy for the development of Drain Water Heat Recovery systems. It was made using the SWOT/TOWS (strengths, weaknesses, opportunities and threats/threats, opportunities, weaknesses and strengths) method, which precisely orders information and allows presenting the project characteristic in readable way for a recipient. The results of the conducted analysis indicated the lack of acceptance on the part of potential users and the resulting need to promote the use of Drain Water Heat Recovery systems at residential level.
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STOYAKIN, G. M., A. V. KOSTIN, and S. N. NAUMENKO. "Development of an air conditioning system with individual regulation of temperature and air flow rate in a compartment of a passenger car." VNIIZHT Scientific Journal 80, no. 1 (April 12, 2021): 30–34. http://dx.doi.org/10.21780/2223-9731-2021-80-1-30-34.
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Maintaining optimal parameters of the microclimate in the car along the route is the most important requirement for the passenger’s travel. In the 1st class passenger cars, maintaining optimal microclimate parameters is achieved through the operation of the air conditioning system, which provides individual regulation of the air temperature in each compartment. Individual air temperature control systems used in air conditioning systems are divided into two groups: active and passive.The article proposes for consideration a combined active-passive system with a separate air supply with a lower and higher temperature compared to the temperature maintained in the compartment and the installation of individual induction terminals, which makes it possible to increase the efficiency of individual regulation of air parameters in the compartment.To assess the uniformity of temperature distribution and air flow rate over the car volume with the proposed control scheme, a three-dimensional modeling of the distribution of these parameters in the compartment was carried out on the basis of Autodesk CFD software.The given simulation results indicate the uniformity of temperature and air flow rate distribution over the compartment volume, which makes it possible to characterize the proposed system as sufficiently energy efficient, easy to operate and reliable in operation.
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ZHUZBAY, Kassymbekov, Alimova KULYASH, and Kassymbekov GALIMZHAN. "STUDY OF THE PROCESS OF EROSION OF A MICRO HYDROELECTRIC POWER PLANT (HPP) TURBINES IN THE FORM OF A HYDROCYCLONE." Periódico Tchê Química 17, no. 36 (December 20, 2020): 527–41. http://dx.doi.org/10.52571/ptq.v17.n36.2020.542_periodico36_pgs_527_541.pdf.
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One of the severe problems of a hydroelectric power plant (HPP) is providing a hydroelectric unit with purified water with the required pressure. Otherwise, the central working bodies - hydraulic turbines - are subjected to abrasive wear and quickly fail. Abrasive wear reduces the efficiency and life of the turbine and causes problems in operation and maintenance. This research aimed to study the degree of abrasive wear (erosion rate) of the surface of a blade hydraulic turbine of a micro HPP during water purification using a hydrocyclone and to ensure its rational layout based on the studies. Investigation of damage to the turbine surface from the dynamic impact was carried out by computer modeling of the process using the Autodesk Simulation CFD program, with different versions of the hydrocyclone body and testing of an experimental sample. Additional software SolidWorks (flow simulation) was used to check the calculations. It was found that the forms of particle hardness in water significantly affect the rate and magnitude of erosion, and a different design of the treatment body in the form of a hydrocyclone in different ways ensures the separation of the flow into phases. A rational scheme for installing a hydraulic turbine inside a hydrocyclone was selected, which provides the required power characteristic of a mini hydroelectric power station and other necessary parameters. The highest degree of water purification from solid impurities (94%) was achieved using the configuration option in a cylindrical-conical design with a rotational water inlet into the hydrocyclone. The location of the hydraulic turbine inside a hydrocyclone of a certain design and the tangential supply of water to the blades of the hydraulic turbine significantly protects the surface of the unit from the effects of solid particles. Their service life can be increased without additional investment in the restoration of the unit.
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Тулубенский, Евгений, Evgeniy Tulubenskiy, Алексей Дроконов, Aleksey Drokonov, Александр Осипов, and Aleksandr Osipov. "INTENSITY DECREASE OF HORSESHOE WHIRLWINDS IN NOZZLE INSTRUMENTS OF TURBOMACHINES." Bulletin of Bryansk state technical university 2016, no. 2 (June 30, 2016): 78–84. http://dx.doi.org/10.12737/20248.
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In this research work there is offered an original method for nozzles designing allowing the structure improvement of the flow arriving in a distributor by means of manufacturing nozzle blades with a perforated input edge and a damping chamber located behind it or with cuts on the end areas of a blade. The analysis of aerodynamic properties of initial and up-dated variants of blades (perforation, making cuts and shears) is carried out with the use of the finite element method in the computation system of automated designing Autodesk Simulation CFD 2014 360. The analysis was carried out with the consideration of different grid models beginning with the simplest (from 500 000 finite elements) and ending with complex models with the closeness of finite elements near a blade profile (up to 2,000 000 finite elements). The research results show that the lowest level of velocities is observed in the variants with a perforated wall and longitudinal cuts. In such a way, these variants of embodiment allow decreasing considerably the intensity of horseshoe whirlwinds (up to 18-20%). A the analysis of pressure distribution in the output section in four variants of blade end area embodiment one can observe that in variants with a perforated wall and longitudinal cuts are seen the best values: in connection with lower pressure loss their effectiveness is on average about 0.2% higher, than the effectiveness of the initial model. The variants offered of the embodiment ensure also the decrease of vibro-acoustic activity of a stage.
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Darshan, G., S. K. Vijayasimha, and Ramasami Sivakumar. "3D Scanning Techniques Complements Predictive Engineering for Mold Flow Analysis." Applied Mechanics and Materials 854 (October 2016): 65–71. http://dx.doi.org/10.4028/www.scientific.net/amm.854.65.
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This study is an attempt to close the loop between simulation and reality. Many industries are of the opinion that a simulation does not really predict the actual process and is only a colorful plot for presentation. An accurate simulation can save cost by a multitude of ways like material savings, process optimization, cycle time reduction, improved quality of parts and so on. A validation of the simulation in a real time scenario will instil necessary confidence in the accuracy of the simulation study thereby closing the loop between simulation and reality In the present study, the mold flow analysis is conducted for the back plate of LED emergency light with the help of Autodesk moldflow simulation software to generate the gate location, feed system building, cooling channel wizard, fill time and to check warpage and then the result is verified by superimposing the scan data of the physical part which is scanned in Steinbichler Blue Light 3D Scanner and CAD model in Geomagic verify.
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Chai, Un Chin, Gow Yi Tzou, Chao Ming Hsu, and Shang Ping Wei. "FEM Simulation of Multi-Stage Forging for Dray Fasteners." Key Engineering Materials 830 (February 2020): 1–8. http://dx.doi.org/10.4028/www.scientific.net/kem.830.1.
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This study uses the dies of the dray fasteners processing graphics provided by the fastener’s industry to establish 3D dies and components solid models based on the embedded drawing function tools provided by the component model (Standard.ipt) of Autodesk Inventor CAD software. After finishing the dies and components drawing, the integrated assembly drawing of dies can be obtained through the assembly model (Standard.iam) firstly. Three stages forming processes can be conducted and carried out the FEM simulation to check the forming acceptance. The effective stress, the effective strain, the velocity field, and the forging force can be obtained by the FEM simulation. Moreover, the realistic experiment can be performed to verify the acceptance of FEM simulation. The dimensions of final product can be measured to get the errors between FEM and experiment. It is noted that the errors show a good agreement with the experiment.
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Pérez-Cerdán, Juan Carlos, Miguel Lorenzo, Alejandro Reveriego, and Carmen Blanco. "Innovative Approach for Teaching Graphical Engineering Focused on CAD/CAM/CAE Systems." Key Engineering Materials 572 (September 2013): 311–14. http://dx.doi.org/10.4028/www.scientific.net/kem.572.311.
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A new approach of the teaching of the subject Graphical engineering is developed at the Engineering School of the University of Salamanca, focusing the contents on the use of the CAD/CAM/CAE systems as useful tools for applying engineering problems related with the mechanical engineering instead of describing diverse software options. Thus, the contents of the subject are divided into two blocks, one devoted to the analysis of the results of simulation of movement of diverse mechanisms and the second devoted to the analysis of diverse cases of loading structural components by means of FEA module, both available in the Autodesk Inventor Pro suite which can be downloaded free by the students. This way, students can visualize and realize of the complexity of a design process in engineering.
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Moraes, Clélia. "Aircraft passenger comfort evaluation: sitting and standing passengers in commercial cabin." E3S Web of Conferences 111 (2019): 01046. http://dx.doi.org/10.1051/e3sconf/201911101046.
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This research investigates the evaluation of passenger comfort during a cruise airplane trip. The flow fields in the comfort design in commercial aircraft create contour conditions for the diffusers, cabinets and geometry cabin, responsible for providing a healthy environment to the passengers. The objective of this work is to characterize the airflow by measuring the velocity field and the air temperature inside the cabin. Based on the actual data, a computational fluid dynamics (CFD) analysis was performed using the Autodesk programming language for the simulations, in order to obtain information about the possible standards of easy and seated comfort for the passengers. The results of particle dispersion in the cockpit showed great influence of the ventilation system and the location in the aircraft where people generate the particles. Based on these results, the internal layout of the BWB2 airplane, also known as “Flying Wing” was projected. The projected cabin furniture features ventilation in order to attend the passenger’s need in flight. It is noted that the incipient individualization of the passenger’s thermal comfort configures one of the biggest problems faced by the airlines. Consequently, It is a possible differential for competition between airlines.
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Yin, Edward, Onesmus Muvengei, and John M. Kihiu. "Inclusion Modeling of Bucket Elevator Conveyor Chain Links." Journal of Engineering 2020 (September 4, 2020): 1–18. http://dx.doi.org/10.1155/2020/8629739.
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Inclusions, pores, and cracks which are defects in materials are important in determining the structural integrity and durability of components. Modeling accurately, these defects are hence of interest to both theorist and the practitioner. CAD models were designed using Autodesk Inventor software, and simulation was performed using ANSYS academic software. Material saving in design of conveyor chain links has gained popularity, and this has led to the introduction of necks in its geometry. However, the effect of necking on various parameters was not considered. Also, inclusions which are defects in material are known to have adverse effect on the conveyor chain link. It is, therefore, imperative to predict numerically, the effects that inclusions and necking have on conveyor chain links This paper focusses on modeling nonmetallic inclusions and also tests various models of different neck radii using the finite element method so as to predict its effect.
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Sapiee, M. R., M. H. M. Marhaban, M. F. Miskon, and A. J. Ishak. "Walking simulation model of lower limb exoskeleton robot design." Journal of Mechanical Engineering and Sciences 14, no. 3 (September 30, 2020): 7071–81. http://dx.doi.org/10.15282/jmes.14.3.2020.09.0554.
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Since 1960s, the development of exoskeleton robots have been advancing in the applications such as load carrying, walking endurance, physical assistance and rehabilitation therapy. Rehabilitation therapy in itself is related to walking ability restoration; especially for the elder people. A survey by The United Nations in 2017 revealed increase trend in the number of ageing population. Due to ageing, it may cause weakened limbs, lower limb injuries or disabilities resulting in walking impairment. Elder people suffering from walking impairment will need to undergo walking therapy to recover walking ability. A walking rehabilitation exoskeleton robot can be used for such patients to undergo the therapy by wearing it on their lower body. A lower limb exoskeleton effectiveness for gait recovery assessment in the design stage is not truly explored yet. This can be done by obtaining the simulation model of the lower limb exoskeleton robot structure from its CAD design. The gait pattern tracking response performance of the exoskeleton design to given inputs can then be observed. The lower limb exoskeleton structure is designed using Autodesk Inventor and then imported into SimMechanics. A block diagram of the exoskeleton model is generated, whereby the model is simulated and its response is observed. Given mathematical expression and experimental data inputs, the exoskeleton model with control system is able to track given joint trajectory inputs. The lower limb exoskeleton model shows that the response of its joints to the inputs can replicate human joints behavior during walking for any given stimulus inputs.
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Djodikusumo, Indra, I. Nengah Diasta, and Fachri Koeshardono. "The Modeling of a Propeller Turbine Runner in 3D Solid Using 3D Equation Curve in Autodesk Inventor 2015." Applied Mechanics and Materials 842 (June 2016): 147–63. http://dx.doi.org/10.4028/www.scientific.net/amm.842.147.
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Published paper on modelling of propeller turbine blade and runner is not commonly found, especially those using Autodesk Inventor. One of them is titled CAD Modelling of Axial Turbine Blade using Autodesk Inventor. However, the road taken is quite complicated and should be repeated from the beginning whenever new geometrical characteristics of a new axial propeller turbine will be modelled. Currently, Autodesk Inventor has introduced the new tool that help sketching the spline lines either in 2D plane or 3D space simplifying the task of 3D modelling of propeller turbine blade, called Equation Curve. The Equation Curve tool requires the codes for creating the spline lines. To create the codes, two sources have been used: NACA report no. 460 and modelling methodology proposed by Milos in his paper. In NACA report no. 460, it is explained that NACA 4 Digit Series is created by combining mean line with the thickness variation curve of Gottingen 398 and Clark Y. This airfoil has 4 different lines with their own equation. The equations can be used for sketching in 2D plane. However, the solid model of the runner blade is formed from the airfoils in cylindrical surface. Then, as explained by Milos in his paper, the procedure is as follows: sketch the airfoil in 2D plane that is the tangent of cylindrical surface, move the airfoil to its center, rotate to its stagger angle, and project it to cylindrical surface. The result of this process will be the equations of lines in 3D space. Transform them to the Inventor codes. Input these codes to 3D Equation Curve tool to create the 4 lines for each cylindrical surface section of blade. Making the solid model of runner the following step is required: use loft command to create blade surfaces, use the stitch command to solidify, use the pattern command to create other blades, create hub, and lastly combine blades and hub. The solid model of the runner then is tested by simulating it using ANSYS Fluent. The hydraulic efficiency of the model is 85%.
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P. Hassan, Mohamed, Abdullah Saad Mahmud, A. S. M. Rafie, and Rizal Zahari. "Alternative Numerical Validation Methodology for Short-Term Development Projects." Applied Mechanics and Materials 564 (June 2014): 638–43. http://dx.doi.org/10.4028/www.scientific.net/amm.564.638.
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Virtual prototyping has been increasingly taking over the process of sole physical tests. Companies are reporting up to 80% reduction in errors when using virtual tests through the design process. Conventional numerical validation methodology however, is not as beneficial for short-term projects because any new numerical scenario has to be validated before being used. Although during the conceptual stage, relative values can be sufficient. The alternative methodology proposed also uses realistic loads. It comprise applying these loads on a functioning structure to verify them. The modified version of the structure is then relatively validated by being tested under these verified loads. Thus, bypassing the physical tests requirement. Aerodynamic loads are acquired from simulating the Gulfstream IV-SP forward fuselage during climbing, cruising and landing. Mechanical loads are acquired from estimating structural weight and impact load during landing. In total, three finite element models were created. Autodesk softwares were used to perform CFD and FEA. Only greater loads were applied during FEA. Results simplified neglected cruising data for having lowest values. Comparing estimated weights of functional and modified structures showed a possible 15% weight savings. While the FEA results showed a promising 45% less inquired stress within the modified structure.
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Nasir, S. M., K. A. Ismail, and Z. Shayfull. "Application of RSM to Optimize Moulding Conditions for Minimizing Shrinkage in Thermoplastic Processing." Key Engineering Materials 700 (July 2016): 12–21. http://dx.doi.org/10.4028/www.scientific.net/kem.700.12.
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This study focuses on the analysis of plastic injection moulding process simulation using Autodesk Moldflow Insight (AMI) software in order to minimize shrinkage by optimizing the process parameters. Two types of gates which is single and dual gates have been analysed. Nessei NEX 1000 injection moulding machine and P20 mould material details are incorporated in this study on top of Acrylonitrile Butadiene Styrene (ABS) as a moulded thermoplastic material. Coolant inlet temperature, melt temperature, packing pressure and cooling time are selected as a variable parameter. Design Expert software is obtained as a medium for analysis and optimisation to minimize the shrinkage. The polynomial models are obtained using Design of Experiment (DOE) integrated with RSM Center Composite Design (CCD) method in this study. The results show that packing pressure is a main factor that contributed to shrinkage followed by coolant inlet temperature, while melt temperature and cooling time has less significant for both single and dual gates. Meanwhile, single gate shows a better result of shrinkage compared to the dual gates.
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Akano, Theddeus Tochukwu. "Numerical Study of Prosthetic Knee Replacement Using Finite Element Analysis." Journal of Biomimetics, Biomaterials and Biomedical Engineering 44 (February 2020): 9–26. http://dx.doi.org/10.4028/www.scientific.net/jbbbe.44.9.
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The knee at times undergoes a surgical process to substitute the weight-bearing surfaces of the knee joint. This procedure relieves the pain and disability around the knee joint. This research paper studied the knee arthroplasty, also referred to as knee replacement. This work was aided with computer vision for visual and accuracy. Autodesk fusion 360 and the stl files were used to generate cemented, posterior stabilised knee prosthesis and imported into the COMSOL Multiphysics software. Then, the three-dimensional models of the total knee arthroplasty (TKA) prosthetic structure are produced. The prosthetic components are modelled as linear isotropic elastic materials. Finite element (FE) simulations using COMSOL Multiphysics on a CAD model of a knee are effectuated to show the effect of several loads and strains on the knee. FE analysis of the model indicates that the orthotropic model depicts a more realistic stress distribution of the knee as it reveals the detailed anatomy of the entire knee structure. The computational results of this work displayed a fair agreement with experimental information from the literature.
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Zivkovic, Dragoljub, Dragan Milcic, Milan Banic, and Pedja Milosavljevic. "Thermomechanical finite element analysis of hot water boiler structure." Thermal Science 16, suppl. 2 (2012): 387–98. http://dx.doi.org/10.2298/tsci120503177z.
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The paper presents an application of the Finite Elements Method for stress and strain analysis of the hot water boiler structure. The aim of the research was to investigate the influence of the boiler scale on the thermal stresses and strains of the structure of hot water boilers. Results show that maximum thermal stresses appear in the zone of the pipe carrying wall of the first reversing chamber. This indicates that the most critical part of the boiler are weld spots of the smoke pipes and pipe carrying plate, which in the case of significant scale deposits can lead to cracks in the welds and water leakage from the boiler. The nonlinear effects were taken into account by defining the bilinear isotropic hardening model for all boiler elements. Temperature dependency was defined for all relevant material properties, i. e. isotropic coefficient of thermal expansion, Young?s modulus, and isotropic thermal conductivity. The verification of the FEA model was performed by comparing the measured deformations of the hot water boiler with the simulation results. As a reference object, a Viessmann - Vitomax 200 HW boiler was used, with the installed power of 18.2 MW. CAD modeling was done within the Autodesk Inventor, and stress and strain analysis was performed in the ANSYS Software.
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Kumar, Neelesh. "Parametric optimization and design validation based on finite element analysis of hybrid socket adapter for transfemoral prosthetic knee." Prosthetics and Orthotics International 38, no. 5 (November 28, 2013): 363–68. http://dx.doi.org/10.1177/0309364613501190.
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Background:Finite element analysis has been universally employed for the stress and strain analysis in lower extremity prosthetics. The socket adapter was the principal subject of interest due to its importance in deciding the knee motion range.Objectives:This article focused on the static and dynamic stress analysis of the designed hybrid adapter developed by the authors. A standard mechanical design validation approach using von Mises was followed. Four materials were considered for the analysis, namely, carbon fiber, oil-filled nylon, Al-6061, and mild steel.Study design:The paper analyses the static and dynamic stress on designed hybrid adapter which incorporates features of conventional male and female socket adapters. The finite element analysis was carried out for possible different angles of knee flexion simulating static and dynamic gait situation.Methods:Research was carried out on available design of socket adapter. Mechanical design of hybrid adapter was conceptualized and a CAD model was generated using Inventor modelling software. Static and dynamic stress analysis was carried out on different materials for optimization.Results:The finite element analysis was carried out on the software Autodesk Inventor Professional Ver. 2011. The peak value of von Mises stress occurred in the neck region of the adapter and in the lower face region at rod eye–adapter junction in static and dynamic analyses, respectively.Conclusions:Oil-filled nylon was found to be the best material among the four with respect to strength, weight, and cost.Clinical relevanceResearch investigations on newer materials for development of improved prosthesis will immensely benefit the amputees. The study analyze the static and dynamic stress on the knee joint adapter to provide better material used for hybrid design of adapter.
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Stupnytskyi, R. M., and V. R. Yarychkivskyi. "DIGITAL EXAMINATION METHODS OF ANATOMICAL ELEMENTS OF MASTICATORY SYSTEM AND BASIC OCCLUSION RELATIONSHIPS." Ukrainian Dental Almanac, no. 4 (December 12, 2018): 32–37. http://dx.doi.org/10.31718/2409-0255.4.2018.06.
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In the modern world, dentistry has achieved a significant possibilities in aesthetic and functional restoration of teeth and dental arches thanks to modern computer technologies. Every day, the latest developments in the dental industry, such as CAD-CAM systems, clinical and laboratory scanners, 3D printers, microscopes, become indispensable attributes of dental institutions. Modern equipment expands the capabilities of dentists in the diagnosis of pathologies of the masticatory system, greatly facilitates the choice of an optimal plan of prosthetic treatment and allows to have a good quality of rehabilitation of patients. An individual place in the concept of treatment relates to variety of software that allows to make a treatment plan and predict its results.
Objective. To create a virtual model of the tooth with periodontal tissues and determine the theoretical aspects, conditions and parameters of its application in examination stresses and deformations that arise in different occlusion relationships.
Methods and materials. 3D modeling is a method of creating various forms and complexity of three-dimensional computer models of real or fantastic objects of the world with the use of various techniques and mechanisms.
Autodesk 3ds MAX (3D Studio MAX) and a polygonal modeling method were used to create 3D models. Mathematical simulation (mathematical modeling) is a method of studying processes or phenomena by creating their mathematical models and studying these models. The method is based on the identity of the form of equations and the uniqueness of the relations between the variables in the equations of the original and the model, that is, their analogy.
Mathematical modeling allows you to replace real objects with its virtual model and then study the last one. As with any simulation, the mathematical model is designed taking into account the physical characteristics of the original object.
Mathematical modeling is carried out in Comsol Multiphysics 4.2a software program ("Comsol AB" (Sweden).
For creation of the three-dimensional model, we chose the frontal area of the upper jaw. The model was created by the polygonal modeling method, taking into account the anatomical parameters of natural teeth and periodontal tissues (Autodesk 3Ds Max software). The size of the teeth, the thickness and shape of the bone tissue contours, the magnitude of the deflection of the tooth axis and the alveolar appendix and the thickness of the mucosa were modeled in accordance to the average parameters.
The created models of anatomical elements were later integrated into the program for computer mathematical modeling. During the study we used the finite element method and entered the following values: Young's modulus, Poisson's coefficient and body density.
Characteristics of the materials for calculating the stress-strain state were absolutely identical to the tissues of the tooth and bone. Each model applied forces in different planes according to occlusal movements: in sagittal plane - forward, force 100 N; in horizontal - transversal movements, force 120N; in the vertical - the force is 400 N. The calculation of the magnitude of force was carried out according to the average statistics of the cross-sectional area of masticatory muscles involved in the movements of the mandible. We also note that these values are critical and maximally possible.
Conclusion: The construction of three-dimensional models of teeth and tissues of periodontium helps to understand in detail the essence of processes occurring in the masticatory system during its functioning, to measure stresses, strains and deformations during occlusion relationships. Analysis of the data obtained with the help of mathematical modeling improves the capabilities of dentists at different stages of functional rehabilitation of patients, simplifies the choice of orthopedic design and has a significant predictive value.
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Suwarsono, Suwarsono, and Budiono Budiono. "Water Turbine Simulation using Autodesk Simulation CFD." Journal of Energy, Mechanical, Material and Manufacturing Engineering 2, no. 2 (December 28, 2017). http://dx.doi.org/10.22219/jemmme.v2i2.5111.
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The need on electricity increases annually while its supply decreases, meanwhile power plant has not increased. Process of building microhydro power plant needs scientifically experience and more time to give suitable result as it designed. Sengkaling Cross-flow Microhydro power plant resulted inappropriate electricity power compare with designed power plant. The design is mostly not in accordance with planned calculation. It is caused by the engineer who is not considering surrounding condition. Therefore, simulation is very important to be conducted that it only needs short time to the design maximally arranged. By simulation, building and assembling process can be conducted faster and decreases error risks. Simulation for this research used AUTODESK SIMULATION CFD.
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LAHAMORNCHAIYAKUL, Werayoot. "The CFD-Based Simulation of a Horizontal Axis Micro Water Turbine." Walailak Journal of Science and Technology (WJST) 18, no. 7 (March 23, 2021). http://dx.doi.org/10.48048/wjst.2021.9238.
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A horizontal axis micro water turbine generator has been designed for use as a source of power generation where the reservoir construction has only a low head. It uses the natural flow rate of water to generate a specific power output. The power is, however, limited by the flow rate of water which has to be sufficient to keep operating a suitable number of revolutions per minute for the blades. Tis research aimed to introduce a new blade can be disassembled and modular on the wheel blade and developing for optimum design of the horizontal axis micro water turbine generator. A 3D model of the wheel blade in the horizontal axis micro water turbine generator was created by using Autodesk Inventor Professional 2018 software. Computational Fluid Dynamics (CFD) analysis and structural Finite Element Analysis (FEA) are presented in this paper. CFD analysis was performed to obtain the velocity and pressure difference between the concave and convex regions of the wheel blade while FEA was used to obtain the structural response of the wheel blade due to the water velocity load applied in terms of stresses and displacements.
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"Performance Evaluation of Shell-and-Tube Heat Exchanger with 3-Fluid Sets using CFD and NTU." International Journal of Engineering and Advanced Technology 9, no. 1 (October 30, 2019): 1416–20. http://dx.doi.org/10.35940/ijeat.a1227.109119.
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Energy generation to the present growing population is a crucial challenge for the power sector. Heat exchangers (HE) plays an important role in the industrial development. In this present work an attempt is made to develop a Shell-and- Tube Heat Exchanger (STHE) with segmental baffles using commercial CATIA V5 and Autodesk CFD Simulation Softwares. TEMA standards are considered for design of STHE with baffle-cut of 25%. 3-different sets of fluids are allowed to pass through the shell and tube sides i.e. Methanol - Sea Water (M-S), Distilled Water – Raw Water (D-R) and Kerosene- Crude Oil (K-C). The boundary conditions imposed for analysis are fluid inlet temperatures and velocities. ϵ-NTU is employed for the validation of simulation results and found good agreement between them. Results are plotted for temperature, pressure and velocity contours. The performance of the STHE is shown best for the K-C fluid set among other fluid sets.
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"Numerical Analysis Natural Convection Heat Transfer from Vertical Cylinder Annular Fins with The Addition of Slits." International Journal of Emerging Trends in Engineering Research 9, no. 4 (April 7, 2021): 405–9. http://dx.doi.org/10.30534/ijeter/2021/11942021.
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One method of increasing the heat transfer rate of the fins is by adding slits to the fins. The purpose of this study was to analyze the heat transfer rate by adding slits in the annular fins with a vertical cylinder under natural convection conditions. The vertical cylinder length, cylinder diameter, fin diameter, and distance between the fins are 313 mm, 25 mm, 125 mm, and 7 mm, respectively. The number of slits varied from 2 slits and 4 slits and the spacing of the slits was kept constant by 5 mm. This research was conducted with a simulation method using Autodesk CFD 2019 software. As a result, fins with slits and fins without slits were compared. The value of the heat transfer rate that occurs and the heat transfer coefficient in the annular fin with slits is better than the fin without slits. The highest heat transfer rates were 142.928 W and 2.6022 W/m 2K for an annular fin with 2 slits
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Tretiakow, Dmitry, Krzysztof Tesch, Jarosław Meyer-Szary, Karolina Markiet, and Andrzej Skorek. "Three-dimensional modeling and automatic analysis of the human nasal cavity and paranasal sinuses using the computational fluid dynamics method." European Archives of Oto-Rhino-Laryngology, October 17, 2020. http://dx.doi.org/10.1007/s00405-020-06428-3.
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Abstract Purpose The goal of this study was to develop a complete workflow allowing for conducting computational fluid dynamics (CFD) simulation of airflow through the upper airways based on computed tomography (CT) and cone-beam computed tomography (CBCT) studies of individual adult patients. Methods This study is based on CT images of 16 patients. Image processing and model generation of the human nasal cavity and paranasal sinuses were performed using open-source and freeware software. 3-D Slicer was used primarily for segmentation and new surface model generation. Further processing was done using Autodesk® Meshmixer TM. The governing equations are discretized by means of the finite volume method. Subsequently, the corresponding algebraic equation systems were solved by OpenFOAM software. Results We described the protocol for the preparation of a 3-D model of the nasal cavity and paranasal sinuses and highlighted several problems that the future researcher may encounter. The CFD results were presented based on examples of 3-D models of the patient 1 (norm) and patient 2 (pathological changes). Conclusion The short training time for new user without a prior experience in image segmentation and 3-D mesh editing is an important advantage of this type of research. Both CBCT and CT are useful for model building. However, CBCT may have limitations. The Q criterion in CFD illustrates the considerable complication of the nasal flow and allows for direct evaluation and quantitative comparison of various flows and can be used for the assessment of nasal airflow.
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"Numerical Simulation of Flow across a Radial Turbine for Prediction of Shaft Power for Driving Automobile Air Conditioners." International Journal of Advanced Science and Engineering 8, no. 1 (August 2, 2021). http://dx.doi.org/10.29294/ijase.8.1.2021.2025-2032.
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The exhaust gas spouting from the exhaust manifold into the radial inflow turbine coupled to an exhaust pipe of a 2.5L petrol engine has been computationally simulated in order to ascertain the extent of exhaust energy recoverability for driving the vehicle auxiliaries, using Autodesk CFD. In order to determine the amount of power available at the turbine shaft at varying engine speeds, properties of the flow and fluid spouting into the turbine from the engine and out of the turbine from the volute outlet were examined by applying the SST k-? turbulence model and advanced Petrov-Galerkin's advection scheme. For the test engine used with the operating range of 2000-6000rpm, at engine speeds up to 3000rpm, the available power was about 0.3kW. At 4000rpm, about 2.8kW of power is available at the turbine shaft, increasing to 7.7kW at 5000rpm and 43.6kW at 6000rpm. Curve-fitting shows that at 5500rpm, as much as 15kW reversible power can be extracted from a shaft coupled to the turbocharger turbine. With an electrically-assisted turbine component of the turbocharger used, the compressor of vapour compression refrigeration system of the vehicle will be efficiently driven at all engine speeds while exhaust energy recovery is achieved.
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Долова, А. А., А. Ю. Константиниди, and Дауда Омара Траоре. "3D simulation basics with the use of Autodesk Fusion 360 CAD system." Politechnical student journal, no. 27 (October 2018). http://dx.doi.org/10.18698/2541-8009-2018-10-389.
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"Reduction of Losses in 90 Degree Pipe Bends by Varying Design Parameters using CFD Software." International Journal of Engineering and Advanced Technology 8, no. 5S3 (September 14, 2019): 78–87. http://dx.doi.org/10.35940/ijeat.e1022.0785s319.
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Fluid plays a vital role in various fields of application like industries or domestic use. The efficient transportation of fluid from one location to another has been a major concern persistently. There are certain energy losses occurring in the flow of fluid whenever there is a change in the path of its flow. In this paper an analysis has been performed across the various general methods employed to generate bent sections, on a 2-D geometric model of a pipe designed using Autodesk Auto CADD 2017. Every alteration of path of fluid flows leads to the loss of momentum of the fluid particles present on the outer layer. This loss of momentum by the particles in turn lead to variation among the fluid parameter like velocity and pressure. These parameters been analyzed in this paper. All the calculations and simulations have been performed on the 2-D axis-symmetric sketches of pipe models, i.e. mesh models under the section of advanced numerical methods using ANSYS R16.0. The fluid being considered in this research activity has been water.
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"Stress Analysis of a Patient-specific Socket Design during Gait Cycle." International Journal of Recent Technology and Engineering 8, no. 4 (November 30, 2019): 6962–66. http://dx.doi.org/10.35940/ijrte.d5185.118419.
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Transtibial amputation is one of the common surgical procedure involved removal of lower limbs specifically below the knee. The need of amputation was caused by major accidents or diseases. Prosthetic socket was an important part as it kept the residual limb in place. It should allow amputee to perform daily activities without caused any pains. Most amputees reviewed the socket’s design caused pain on their residual limb. This project was purposed to analyse the pressure distribution on the prosthetic socket design. Design of the socket was based on stump’s condition which verified from the hospitals. Autodesk Meshmixer software was used to remodel the socket design from 3D Computer Aided Design (CAD) data of real stump. Pressure sensors measured the pressure exerted due to contact between socket and stump. The measured pressure distribution was analysed according to the pressure tolerant and sensitive areas to avoid the uncomfortable pain. The simulation of socket design was simulated using Finite Element Method (FEM) in ANSYS Static Structural. FEM indicated the behaviour of the socket during static and dynamic condition. Then, prosthetic sockets were fabricated in-house manufacturing process based on Fused Deposition Modelling (FDM) technology using 2.85-mm filament of polyamide nylon (PA). Thus, the tensile properties of the nylon socket material were determined according to ASTM D638. The evaluated stress was 11.30 MPa at the mid-stance that proved the material was highly strength to support the load. The structural integrity of the complete prosthesis socket should be investigated according to ISO 10328 for future improvement