Journal articles: 'COMSOL MULTIPHYSICS SOFTWARE'

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Adam, Tijjani, and U. Hashim. "COMSOL Multiphysics Simulation in Biomedical Engineering." Advanced Materials Research 832 (November 2013): 511–16. http://dx.doi.org/10.4028/www.scientific.net/amr.832.511.

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In the past two decades, COMSOL Multiphysics Software Package have emerged as a powerful tool for simulation, particularly in Nanotechnology and most importantly in biomedical application and various application involving fluid and solid interactions. Compared with conventional component or system design, distinctive advantages of using COMSOL software for design include easy assessing to the significant parameters in various levels of design, higher throughput, process monitoring with lower cost and less time consuming [1,. This review aims to summarize the recent advancements in various approaches in major types of micro fluidic systems simulations, design application of various COMSOL models especially in biomedical applications. The state-of-the-art of past and current approaches of fluid manipulation as well as solid structure design fabrication was also elaborated. Future trends of using COMSOL in nanotechnology, especially in biomedical engineering perspective.

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Asmi, Ade, Jouvan Chandra Pratama Putra, and Ismail Abdul Rahman. "Simulation of Room Airflow Using Comsol Multiphysics Software." Applied Mechanics and Materials 465-466 (December 2013): 571–77. http://dx.doi.org/10.4028/www.scientific.net/amm.465-466.571.

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Airflow in a room can be supplied both through natural mean and also by the helps of mechanical ventilation. Natural ventilation is more sustainable compared to mechanical system; however natural ventilation, it may not be sufficient to fulfil the need of ventilation for a specific room. This study presents simulation works carried out regarding to the airflow movement in a room due to mechanical ventilation. The measurement of air velocity was taken using Davis anemometer at random point in the room. The measured air velocity then used as an input in simulation work which used Comsol Multiphysics software. The simulation process begins by building up geometry of the room, assigning constant parameters, meshing the geometry of the room, and finally run the solver analysis. The results from simulations indicate that the air distributions in the room are below ASHRAE standard. This is due to the airflow distribution from the airflow injection of air-conditioning system is not well distributed. The simulations results are validated with the measured value and found that the percentage differences between the simulated and measured values are within the range of 3 - 10 %. Keywords: Simulation, Airflow movement, Mechanical ventilation, Comsol Multiphysics software

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M ziou, Nassima, Hani Benguesmia, and Hilal Rahali. "Modeling Electric Field and Potential Distribution of an Model of Insulator in Two Dimensions by the Finite Element Method." International Journal of Energetica 3, no. 1 (June 30, 2018): 01. http://dx.doi.org/10.47238/ijeca.v3i1.58.

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The electrical effects can be written by two magnitudes the field and the electrostatic potential, for the determination of the distribution of the field and the electric potential along the leakage distance of the polluted insulator, the comsol multiphysics software based on the finite element method will be used. The objective of this paper is the modeling electric field and potential distribution in Two Dimensions by the Finite Element Method on a model of insulator simulating the 1512L outdoor insulator used by the Algerian company of electricity and gas (SONELGAZ). This model is under different conductivity, applied voltage, position of clean layer and width of clean layer. The computer simulations are carried out by using the COMSOL multiphysics software. This paper describes how Comsol Multiphysics have been used for modeling of the insulator using electrostatic 2D simulations in the AC/DC module. Numerical results showed a good agreement.

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Kolomeytsev, Andrey, Pavel Baranov, and Ivan Zatonov. "The Fluxgate Magnetometer Simulation in Comsol Multiphysics." MATEC Web of Conferences 155 (2018): 01005. http://dx.doi.org/10.1051/matecconf/201815501005.

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This article describes the fluxgate magnetometer simulation in Comsol Multiphysics software package. The simulation results coincide with the experiment described earlier. Decomposition of the output signal by the Fourier coefficients shows a frequency doubling.

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Ariffin, Shahrul A. B., U. Hashim, and Tijjani Adam. "Designing Microchannels Separator Mask for Lithography Process." Advanced Materials Research 795 (September 2013): 563–67. http://dx.doi.org/10.4028/www.scientific.net/amr.795.563.

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Recently microfluidic has drawn attention from fellow research because of their unique properties and behavior in biotechnology, biomedical, micro and nanotechnology. Microfluidic is a combination from several components that consists from Microhannel, micromixer, microchamber, concentrator, separation and valve but component of microfluidic will be conduct in simulation is microfluidic separation and microchannel. This paper will elaborate more about design of microchannel separator by using COMSOL Multiphysics 3.5 software and base on the result from the COMSOL Multiphysics 3.5, we can create a detail design in the autoCAD software and lastly, as the result for this paper is an actual fabrication mask will be reveal for further fabrication process.

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Sumit, Rahul Shukla, and A. K. Sinha. "Finite element method coupled with TLBO for shape control optimization of piezoelectric bimorph in COMSOL Multiphysics." SIMULATION 97, no. 9 (July 6, 2021): 635–44. http://dx.doi.org/10.1177/00375497211025640.

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Finite element methods (FEMs) are more advantageous for analyzing complex geometry and structures than analytical methods. Local search optimization techniques are suitable for the unimodal problem because final result depends on the starting point. On the other hand, to optimize the parameters of multi-minima/maxima problems, global optimization-based FEM is used. Unfortunately, global optimization solvers are not present in, COMSOL Multiphysics, a versatile tool for solving varieties of problems using FEM. Teaching–learning-based optimization (TLBO) is a global optimization technique and does not require any algorithm-specific parameter. In this paper, FEM is coupled with TLBO algorithms in COMSOL Multiphysics for solving the global optimization problem. The TLBO algorithm is implemented in COMSOL Multiphysics using the JAVA application programming interface and tested with the standard benchmark functions. The solutions of the standard benchmark problem in COMSOL Multiphysics are in close agreement with the results presented in literature. Furthermore, the optimization procedure thus established is used for the optimization of actuator voltage for piezoelectric bimorphs to achieve the desired shapes. The FEM-based TLBO method is compared with two optimization methods present in COMSOL Multiphysics for a shape control problem; (i) method of moving asymptotes (MMA) and (ii) Bound Optimization BY Quadratic Approximation (BOBYQA). The root mean square error shows that the FEM-based TLBO algorithm converges to a global minimum and gives the same result (19.3 nm) at multiple runs, whereas MMA and BOBYQA trapped in local minimum and gave different results for different starting points.

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Thilmany, Jean. "Multiphysics: All at Once." Mechanical Engineering 132, no. 02 (February 1, 2010): 39–41. http://dx.doi.org/10.1115/1.2010-feb-5.

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This study presents an overview of multiphysics software, whose implementation simulate physical phenomena in tandem to depict real-life behavior on a virtual prototype. In order to give engineers access to multiphysics packages, many vendors’ focus now is on speeding the applications and making them intuitive to use. Multiphysics software analysis is helping to reduce feedback noise in hearing aids made by Widex of Copenhagen, Denmark. Engineers at hearing aid maker Widex use Comsol multiphysics software to simulate vibrations within the ear, and thus to reduce hearing-aid noise and feedback. Meanwhile, engineers at steelmaker ArcelorMittal of Luxembourg City, Luxembourg, turned to multiphysics modeling to help them find the most corrosion-resistant steel possible. Developers of multiphysics software say they are addressing the reality that physical phenomena do not operate singly in nature. They believe that solving for multiple phenomena can make simulations more realistic. And they are designing software packages to be easier to use and more accessible, to put them into the hands of more engineers.

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Khan, K. I., M. A. Kazhmaganbetova, and T. N. Zaichenko. "Conceptual model of software to develop acoustic emission diagnostic system." Proceedings of Tomsk State University of Control Systems and Radioelectronics 23, no. 4 (December 25, 2020): 51–56. http://dx.doi.org/10.21293/1818-0442-2020-23-4-51-56.

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A generalized diagram of an acoustic emission diagnostic system is presented and a set of programs for its design is proposed. The propagation of an acoustic wave simulation is carried out by COMSOL Multiphysics in plane case under various conditions and the coincidence of the results with the COSMOS / M modelling system results is shown.

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Just, Krzysztof, Paweł Piskur, and Mariusz Żokowski. "Dynamic Analysis of the Tubular Linear Actuator With Permanent Magnets." Scientific Journal of Polish Naval Academy 216, no. 1 (March 1, 2019): 5–15. http://dx.doi.org/10.2478/sjpna-2019-0001.

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Abstract In this paper a results of a transient analysis of the linear actuator is presented. The linear actuator consist of the three cylindrical unmovable coils surrounded by a soft ferromagnetic case, a runner made from sequence of ferromagnetic and permanent magnet rings. The model of the linear actuator was implemented into two software: the Comsol Multiphysics and the Matlab-Simulink. Both environments are commonly used in simulation analysis, but the first one uses Finite Element Method (FEM) and the second one uses Ordinary Differential Equations (ODE). Moreover, the dynamic model was analysed in Matlab-Simulink software with value of electromagnetic phenomena implemented from Comsol Multiphysics. Comparison was made due to the time needed for calculation, accuracy of the simulation model as well as the as utility for further optimization process.

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Mozafari, B., M. Fahs, B. Ataie-Ashtiani, C. T. Simmons, and Rafic Younes. "On the use of COMSOL Multiphysics for seawater intrusion in fractured coastal aquifers." E3S Web of Conferences 54 (2018): 00020. http://dx.doi.org/10.1051/e3sconf/20185400020.

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COMSOL Multiphysics is a comprehensive simulation software environment for a wide range of applications. COMSOL has an interactive interface that facilitates the modeling procedure and allows an easy coupling of different physical processes. The Subsurface Flow module extends the COMSOL modeling environment to applications related to fluid flow in saturated and variably saturated porous media. COMSOL is increasingly used in the investigation of geophysical, hydrogeological and environmental phenomena. The main goal of this work is to explore the ability of COMSOL for simulating seawater intrusion (SWI) in fractured coastal aquifers. Numerical modeling of such a problem is of high interest as fractured/karstic coastal aquifers are widespread and processes of SWI in the presence of fractures remains poorly understood. We set up a COSMOL model for the popular Henry problem. The accuracy of COMSOL is highlighted by comparison against the semianalytical solutions for simple homogeneous aquifers. For fractured aquifers, the performance of COSMOL is evaluated by comparison against an in-house finite element model based on the discrete fracture model and against the results of existing works. Given its versatility and flexibility, COMSOL shows promise as a tool for SWI in coastal aquifers.

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Mukhanov, Bakhyt K., Zhanar Zh Omirbekova, Azamat K. Usenov, and Waldemar Wójcik. "Simulating In-Situ Leaching Process Using Comsol Multiphysics." International Journal of Electronics and Telecommunications 60, no. 3 (October 28, 2014): 213–17. http://dx.doi.org/10.2478/eletel-2014-0026.

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Abstract The paper deals with simulation of in-situ uranium leaching technological process, collecting data for forecasting and leaching process control. It provides numerical simulation of uranium in-situ leaching (ISL) using Comsol Multiphysics software package application. Previous studies evaluated main hydrodynamic characteristics of wells and reservoirs, such as the coefficient of resistance and the saturation recovery; while this paper is concerned with determining the changes in process variables in the wells during operation.

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Istardi, Didi, and Andy Triwinarko. "Induction Heating Process Design Using COMSOL® Multiphysics Software." TELKOMNIKA (Telecommunication Computing Electronics and Control) 9, no. 2 (August 1, 2011): 327. http://dx.doi.org/10.12928/telkomnika.v9i2.704.

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Piacsek, Andrew A., and Ralph T. Muehleisen. "Using COMSOL multiphysics software to investigate advanced acoustic problems." Journal of the Acoustical Society of America 130, no. 4 (October 2011): 2363. http://dx.doi.org/10.1121/1.3654468.

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Dragan, Razvan Gabriel, Ileana Constanta Rosca, Diana Cazangiu, and Alexandru Stefan Leonte. "Thermal Response for a Reinforced Concrete Slab Analyzed with Active Infrared Thermography and Comsol Multiphysics." Applied Mechanics and Materials 760 (May 2015): 627–32. http://dx.doi.org/10.4028/www.scientific.net/amm.760.627.

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This paper presents a non-destructive technique (NDT) using active infrared thermography and FEM analyses with Comsol Multiphysics software applied for thermal distribution detection through reinforced concrete. For this work a reinforced concrete slab was created having a parallelepiped shape, the length and the width of 400 mm and the thickness of 50 mm. The concrete slab was reinforced using a rebar mesh of 18 mm diameter. The experimental installation consisted of an electrical heating source and a steel frame for fixing the slab and for the thermal distribution analyses an infrared camera was used. The same type of material and conditions like in the laboratory was used for the FEM analyses in Comsol Multiphysiscs to compare with the experimental part. A concrete slab without steel was used to determine the difference between the simple concrete and reinforced concrete in the heat transfer process.

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Warsito, I. F., H. Widyaputera, E. Supriyanto, J. Pusppanathan, M. A. A. Taib, and M. F. M. Yasir. "Simulation of 500 MHz Electromagnetic Interference Effect on Electrical Equipment with Various RF Grids and Enclosures." International Journal on Robotics, Automation and Sciences 1 (November 13, 2019): 21–27. http://dx.doi.org/10.33093/ijoras.2019.1.3.

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This paper presents the modelling and simulation of a protection system for equipment in the oil and gas industry with various RF grids and enclosures against 500 MHz electromagnetic interference (EMI). COMSOL Multiphysics®Modelling software was used in this study. Electric and magnetic fields distributions were determined by using the Generalized Minimal Residual Method (GMRES) which was integrated into COMSOL Multiphysics® Modelling software. Simulation results indicated that larger RF grid size contributed to the higher electric and magnetic field on equipment. Furthermore, without RF grid, electric and magnetic fields on the equipment were increased significantly (up to 100x). The maximum electric and magnetic fields were found to be near resonance enclosure size (299 mm for 500 MHz frequency source). The results showed that the presence of the RF grid for the EMI protection system was essential.

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Lao, Zhen Hua. "Effects of Fractured-Vuggy Porous Media Geometrical Configuration on Oil and Gas Reservoir Pressure Force Field." Applied Mechanics and Materials 700 (December 2014): 587–91. http://dx.doi.org/10.4028/www.scientific.net/amm.700.587.

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According to the Darcy - Stokes equations of fractured-vuggy porous medium, using COMSOL Multiphysics software, we calculated several typical conceptual model pressure field distribution, analyzed the influence of fractured-vuggy porous medium internal vug and fractured geometric configuration on the pressure field in the model.

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N, Divya, Jyothi V, and Rajesh Kumar B. "Design & Simulation of MEMS Accelerometer Using COMSOL Multiphysics Software." International Journal of Engineering Trends and Technology 20, no. 5 (February 25, 2015): 244–47. http://dx.doi.org/10.14445/22315381/ijett-v20p247.

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Sun, Yu Xin, Jing Xin Liu, and Qi Rong Sun. "Simulation of Laser-Induced Thermoelastic Behavior in Metal Plates." Advanced Materials Research 748 (August 2013): 327–30. http://dx.doi.org/10.4028/www.scientific.net/amr.748.327.

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In this paper, the thermoelastic behavior of Al plate induced by laser pulse is simulated using the commercial software COMSOL Multiphysics. In the simulation, the heat transfer in combination with phase change is considered. The variation of the temperature and stress fields along the thickness direction is obtained and analyzed.

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Nazrin Ismail, Muhamad, Noriah Yusoff, Nor Hayati Saad, and Amirul Abd Rashid. "Design and Simulation of MEMS Moisture Sensor Using COMSOL Multiphysics Software." International Journal of Engineering & Technology 7, no. 4.26 (November 30, 2018): 141. http://dx.doi.org/10.14419/ijet.v7i4.26.22155.

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Micro-electro-mechanical system (MEMS) is a hybrid technology that combines electronic, electric and mechanical technology in a micron-size system. This allowed for higher performance and multifunction devices fabricated at much lighter weight and cost effective. One of the major application of MEMS is in sensor devices area. This paper highlight the simulation study of a typical moisture sensor fabricated from Tungsten Interdigitated (IDE) MEMS device. Using COMSOL Multiphysics software, the moisture sensor was modelled based on the current material and physical dimension and layout. The model then go through validation proses to its sensitivity performance against the experimental result. Subsequently, the optimization on sensor sensitivity was carried out by varying the model parameters including the sensor physical dimension, working temperature and humidity. The simulation result suggest that the sensor sensitivity is highly correlated to the electrode distance value. The average sensitivity of the sensor improved to ~48% better when the distance between reduced to 50% from 6 micron to 3 micron tested at temperature between 25 ̊ C to 45 ̊ C. This information is valuable as the input to the sensor designer in finalizing the MEMS physical layout in producing highly sensitive moisture sensor devices.

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von Schenck, Henrik, Ulrik Kautsky, Björn Gylling, Elena Abarca, and Jorge Molinero. "Advancing the Modelling Environment for the Safety Assessment of the Swedish LILW Repository at Forsmark." MRS Proceedings 1744 (2015): 223–28. http://dx.doi.org/10.1557/opl.2015.348.

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ABSTRACTAn extension of the Swedish final repository for short-lived radioactive waste (SFR) is planned and a safety assessment has been performed as part of the licensing process. Within this work, steps have been taken to advance the modelling environment to better integrate its individual parts. It is desirable that an integrating modelling environment provides the framework to set up and solve a consistent hierarchy of models on different scales. As a consequence, the consistent connection between software tools and models needs to be considered, related to the full assessment domain. It should also be possible to include the associated geometry and material descriptions, minimizing simplifications of conceptual understanding.The usefulness of the analysis software Comsol Multiphysics as component of an integrating modelling environment has been tested. Here, we present two examples of hierarchical models. Consistent properties and boundary conditions have been extracted form regional hydrogeology and surface hydrology models when setting up repository scale models. CAD models of the repository have been imported into the analysis software, representing tunnel systems and storage vaults with engineered structures and barriers. Data from geographic information systems such as digital elevation models and geological formations have been also directly implemented into model geometries.The repository scale hydrology models have provided a basis for further developments focussed on the modelling of coupled processes. An interface between Comsol Multiphysics and the geochemical simulator Phreeqc has been developed to support reactive solute transport studies. An important test case concerns radionuclide transport in a 3D, near-surface model of a catchment area. The dynamic surface hydrology has been simulated with MIKE SHE and connected to Comsol Multiphysics and Phreeqc for detailed hydro-geo-chemical modelling of radionuclide migration through soils and sediments.

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Meitei, Sorokhaibam Nilakanta, Kunal Borah, and Saibal Chatterjee. "Modelling of Acoustic Wave Propagation Due to Partial Discharge and Its Detection and Localization in an Oil-Filled Distribution Transformer." Frequenz 74, no. 1-2 (January 28, 2020): 73–81. http://dx.doi.org/10.1515/freq-2019-0050.

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AbstractPartial discharge (PD) is the main cause of the insulation decay and hence periodical testing of the insulation condition of a distribution transformer is necessary. This paper presents a model of PD acoustic wave propagation, detection, and localization in an oil-filled distribution transformer using finite element method supported by COMSOL Multiphysics software. Using an acoustic module and AC/DC module of COMSOL Multiphysics software, oil filled distribution transformer, and the acoustic piezoelectric sensor are simulated to analyze and detect the PD inside the transformer. PD is numerically simulated in the transformer windings, core, and oil ducts that produce acoustic wave signal. The distribution of the acoustic pressure wave inside the model transformer is analyzed first. Next, the acoustic piezoelectric sensors are modelled at four different locations of the model transformer to detect the pressure acoustic wave signal induced due to PD in the transformer. Finally, using an artificial neural network (ANN), the localization, and identification of PD in various parts of the transformer have been analyzed. The results obtained for location and detection are quite encouraging.

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Sadeghi, H., and M. Habibi. "Designing a compact, portable and high efficiency reactor." Modern Physics Letters A 34, no. 26 (August 30, 2019): 1950207. http://dx.doi.org/10.1142/s0217732319502079.

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In this paper, in order to produce high-energy neutrons, the design of a compact, portable and high efficiency reactor based on a plasma focus device is investigated. The COMSOL Multiphysics software was used to investigate and optimize 16 plasma focus devices with different stored energies for producing neutrons. To keep the fission reactor at the subcritical condition, fuel assembly containing a specific combination of fission fuel of [Formula: see text]U – [Formula: see text]Pu was used. As a result of energetic neutrons produced in the plasma focus device, no radioactive waste remained in the reactor. In addition, an efficient gas cooling system that absorbed and transferred heat was designed using the COMSOL Multiphysics software. The absorbed heat was transferred to the thermo-photo-voltaic converter, and thus electricity was generated with an efficiency of about 40%. Electrical and thermal energies are calculated in each shot for every plasma focus device. Finally, we showed that high frequency plasma focus devices had a high potential to produce energy.

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Mazloum, Shawki, Sary Awad, Youssef Abou Msallem, Nadine Allam, Khaled Loubar, and Mohand Tazerout. "Modeling of a pyrolysis batch reactor using COMSOL Multiphysics." MATEC Web of Conferences 261 (2019): 04003. http://dx.doi.org/10.1051/matecconf/201926104003.

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Plastic Pyrolysis is a thermal degradation process; it offers an important alternative energy. The aim of this study is to model a batch reactor to be used for plastic pyrolysis. Consequently, four experiments with different heating and cooling cycles are done using an empty pyrolysis batch reactor and four temperatures are measured at different locations on the reactor. On the other hand, the empty reactor is modeled and several simulations are done, using COMSOL Multiphysics software, under the same experimental conditions. By comparing the temperatures obtained from simulation to those measured experimentally, it is noticed that the results are very close with a maximum error of 4%, hence the model is validated.

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Hasnul Hadi, Nur Amira, Arshad Ahmad, and Olagoke Oladokun. "Modelling pressure distribution in sonicated ethanol solution using COMSOL simulation." E3S Web of Conferences 90 (2019): 02003. http://dx.doi.org/10.1051/e3sconf/20199002003.

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Ultrasound application has been reported to assist chemical processes as a result of various physiochemical effects during acoustic cavitation phenomena in a liquid. In this study, acoustic pressure distribution in ethanol solution induced by ultrasonic waves in a sonoreactor was investigated using COMSOL Multiphysics software. The variations of acoustic pressure distribution in ethanol liquid were investigated through a single-phase incompressible model developed by varying the frequency of an ultrasonic transducer. The simulation in COMSOL Multiphysics shows that the acoustic wave emitted from the bottom of the sonoreactor generated multiple layers of high acoustic pressure distribution. The fluctuating pressure magnitude along the sonoreactor shows that constructive interference produced high acoustic pressure region whereas destructive interference resulted in low acoustic pressure. Meanwhile, the distance over sound wave can travel before attenuation occurs is much further at 60 kHz. These results support the theory that wave attenuation is strongly frequency dependent.

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Egorova, Oksana, Victor Kosushkin, and Leo Kozhitov. "Model of Nano-Metal Electroplating Process in Trapezoid Profile Groove." Condensed Matter 4, no. 1 (February 21, 2019): 26. http://dx.doi.org/10.3390/condmat4010026.

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The principle of the electrodeposition method is to immerse the coated products in a water electrolyte solution, the main components of which are salts or other soluble compounds—metal coatings. The software COMSOL Multiphysics was allowed to perform a simulation of the processes of electrodeposition of the metals copper and silver in the groove of the trapezoidal profile.

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Liu, Y. C., Y. C. Huang, Yun Jhe Tang, and Tzu Hsuan Lei. "Evaluations of Absorption Materials Applied in the Noise Reduction: Experiment and Simulation." Materials Science Forum 947 (March 2019): 125–29. http://dx.doi.org/10.4028/www.scientific.net/msf.947.125.

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This article presents a finite element simulation method for airflow resistance of material to predict the influence of absorption material applied to compressor box. To obtain the real airflow resistance, a measurement system based on the standard ASTM C522-03 was systematically built up and carefully verified. Furthermore, commercial finite element software, COMSOL Multiphysics, was adopted to create the model and execute the simulation with and without absorption material. Results showed that airflow resistance increases with the thickness and the density of the material. This system is quite stable and suited to any material. With the aid of COMSOL Multiphysics simulations, the performance of noise with and without absorption material can be analyzed and compared with experimental results. There was good agreement between experimental and simulation results. Based on absorption material of 15,278 Pa.s/m3 airflow resistance, the noise level outside the compressor box obtained from experiment was around 10 dBA higher than that obtained from simulation.

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Zhapbasbayev, U. K., and A. D. Kudaibergen. "Modeling of heat transfer in a fuel pellet based on uranium dioxide and ceramics (beryllium oxide)." Kompleksnoe Ispolʹzovanie Mineralʹnogo syrʹâ/Complex Use of Mineral Resources/Mineraldik Shikisattardy Keshendi Paidalanu 318, no. 3 (September 12, 2021): 81–89. http://dx.doi.org/10.31643/2021/6445.31.

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The results of heat transfer mathematical model calculations in the “UO2-BeO” pellet are presented. The fuel pellet consists of uranium dioxide (UO2) and beryllium oxide (BeO) ceramics. Modeling of heat transfer was carried out by a system of generalized heat conduction equations with variable thermophysical properties. The calculated data of the temperature field in the fuel pellet were obtained using the COMSOL Multiphysics software code. The results of temperature calculations were compared with the data of other authors. The agreement of the calculated data shows the mathematical model and the COMSOL Multiphysics code algorithms correctness. Various arrangements of beryllium oxide ceramics BeO in a fuel pellet are considered. The arrangement of the BeO ceramics in the centre of the fuel pellet showed a noticeable decrease in temperature in the energy release zone. Calculations have shown that the composite fuel “UO2-BeO” is the most effective for regulating the thermal regime of fuel elements.

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Belov, A. V., O. V. Kopchenov, A. O. Skachkov, and D. E. Ushakov. "Solid-state explosion simulation in COMSOL Multiphysics." Multiphase Systems 14, no. 4 (2019): 253–61. http://dx.doi.org/10.21662/mfs2019.4.032.

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In this work, the propagation of blast waves in a rock mass caused by a short-term load is considered. Such loads are typical in the construction of tunnels and other excavations using blasting. For modeling by the finite element method, the cross-platform software COMSOL Multiphysics 5.4 was used. The explosion is reproduced in a steel tank whose steel grade is EN 1.7220 4CrMo4. The medium in the tank has the properties of granite rock (Young’s modulus E = 50 GPa, Poisson’s ratio ν = 2/7, Density ρ = 2700 kg/m3 ). The sphere is also a body having the properties of granite. Set to clarify the geometry of the explosion and the area where the mesh is indicated. The tank has dimensions: 10.39 m in length and diameter 2.9 m. The wall thickness of the tank is 0.01 m. To model the explosion, the Solid Mechanics interface was used, located in the Structural Mechanics branch, based on solving equations of motion together with a model for solid material. Results such as displacement, stress, and strain are calculated. The force per unit volume (Fv) is specified by the normal pressure in the sphere. Also, the tensile strength was calculated for this steel grade: upon reaching a certain pressure in the tank (7.26 MPa), the simulation stops, and the system notifies at what point in time the destruction occurred. A Time Dependent Study is used. Seconds are used as a unit of time. The task is calculated from 0 seconds (initial moment of time) to 0.003 seconds (final moment of time) with a construction step of 0.00005.

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Потапов, Леонид, Leonid Potapov, Татьяна Сморудова, and Tatyana Smorudova. "Modeling of the bidirectional transaction motion generator with selfexcitation." Bulletin of Bryansk state technical university 2015, no. 1 (March 31, 2015): 41–45. http://dx.doi.org/10.12737/22747.

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Offered design of the bi-directional transaction motion generator with self-excitation without constant magnet. By means of COMSOL Multiphysics software is organized research of the distribution by magnetic flap under different positions rolling magnetic core, is brought model of the offered generator in program Electronics Workbench with determination of the voltages and current in load and winding of the generator.

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Tao, Shu Lang, Gui Lan Yu, and Zong Jian Yao. "Flexural Wave Propagation Characteristics of Lattice Sandwich Plates." Advanced Materials Research 753-755 (August 2013): 857–60. http://dx.doi.org/10.4028/www.scientific.net/amr.753-755.857.

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This paper is aimed to study flexural wave propagation characteristics of lattice sandwich plates. Based on Blochs theorem, band structure of flexural wave propagation in the plate is obtained by commercial finite element software Comsol Multiphysics. Meanwhile, frequency response is obtained and its maximum attenuation is exactly corresponding to the band gaps. Finally, effects of lattice pattern on band gaps are introduced.

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MATYUKHIN, S. I., D. O. MALYI, A. S. VISHNYAKOV, E. Yu ORLOV, and V. I. KAZAKOV. "THERMAL RESISTANCE OF POWER SEMICONDUCTOR MODULES OF SOLDERED CONSTRUCTION." Fundamental and Applied Problems of Engineering and Technology 5 (2020): 122–30. http://dx.doi.org/10.33979/2073-7408-2020-343-5-122-130.

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The heat transfer processes in power semiconductor modules of soldered construction are studied using the methods of computer simulation in Comsol Multiphysics software. The problem of the thermal resistance of such modules is solved. The factors showing the main effect on the thermal resistance of the modules are studied. A mathematical model allowing engineering calculations of this resistance is developed.

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Reddy, Gujji Murali Mohan, Alan B. Seitenfuss, Débora de Oliveira Medeiros, Luca Meacci, Milton Assunção, and Michael Vynnycky. "A Compact FEM Implementation for Parabolic Integro-Differential Equations in 2D." Algorithms 13, no. 10 (September 24, 2020): 242. http://dx.doi.org/10.3390/a13100242.

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Although two-dimensional (2D) parabolic integro-differential equations (PIDEs) arise in many physical contexts, there is no generally available software that is able to solve them numerically. To remedy this situation, in this article, we provide a compact implementation for solving 2D PIDEs using the finite element method (FEM) on unstructured grids. Piecewise linear finite element spaces on triangles are used for the space discretization, whereas the time discretization is based on the backward-Euler and the Crank–Nicolson methods. The quadrature rules for discretizing the Volterra integral term are chosen so as to be consistent with the time-stepping schemes; a more efficient version of the implementation that uses a vectorization technique in the assembly process is also presented. The compactness of the approach is demonstrated using the software Matrix Laboratory (MATLAB). The efficiency is demonstrated via a numerical example on an L-shaped domain, for which a comparison is possible against the commercially available finite element software COMSOL Multiphysics. Moreover, further consideration indicates that COMSOL Multiphysics cannot be directly applied to 2D PIDEs containing more complex kernels in the Volterra integral term, whereas our method can. Consequently, the subroutines we present constitute a valuable open and validated resource for solving more general 2D PIDEs.

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Dudarev, A. S., and E. Kh Gumarov. "Study of thermophysics during diamond drilling of fibreglass and carbon fibre-reinforced polymer composites." Proceedings of Irkutsk State Technical University 25, no. 3 (July 6, 2021): 290–99. http://dx.doi.org/10.21285/1814-3520-2021-3-290-299.

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This paper examines thermophysics of the drilling process of polymeric composite materials, such as carbon-fibre-reinforced plastics (CFRP) and fibreglass by tubular diamond drill bits. Features of the COMSOL Multiphysics engineering software package were used. We employed Fourier heat equations, which express the intensity of heat gain by a mobile source in a moving coordinate system. The research was performed using the proprietary method of modelling spatial thermal action upon drilling polymer composite materials (fibreglass and carbon-fibre-reinforced plastics) in the COMSOL Multiphysics software environment. A tubular diamond drill bit with a diameter of 10 mm with two slots was chosen as a model cutting tool. Solid plates with a thickness of 5.5 mm made of layered fibrous polymer composite materials (fibreglass, carbon-fibre-reinforced plastic) were used as a preform. As a result of computer calculations, we obtained temperature fields of fibreglass and carbon-fibre-reinforced plastic during diamond drilling with a tubular tool. When studying the thermal behaviour of fibreglass and carbon-fibre-reinforced plastics, maximum temperature fields were located. The study revealed that the temperature reaches 413.6 and 448.7 K during CFRP and fibreglass drilling, respectively. It was shown that the distance of heat transfer from the edge of the hole into the preform was 6.42 and 6.40 mm for CFRP and fibreglass, respectively. A method of modelling the thermal effects when cutting polymer composite materials developed in the COMSOL Multiphysics environment allows complex analytical calculations of temperatures induced by drilling to be simplified. In addition, its use prevents overheating of a preform during drilling, allows assessing the depth of heat distribution inside the preform from the edge of the formed hole in different polymer composite materials. These measures increase the machining quality of polymer composite materials.

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Savitsky, I. V., and V. A. Voytenko. "Studying a grinding method of sapphire pipes using two grinders." Proceedings of Irkutsk State Technical University 25, no. 3 (July 6, 2021): 320–31. http://dx.doi.org/10.21285/1814-3520-2021-3-320-331.

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This paper examines the thermophysics of a drilling process of polymeric composite materials such as carbonfibre-reinforced plastics (CFRP) and fibreglass by tubular diamond drill bits. Features of the COMSOL Multiphysics engineering software package were used. We employed Fourier heat equations, which express the intensity of heat gain by a mobile source in a moving coordinate system. The research was performed using the proprietary method of modelling spatial thermal action upon drilling polymer composite materials (fibreglass and carbon-fibre-reinforced plastics) in the COMSOL Multiphysics software environment. A tubular diamond drill bit with a diameter of 10 mm with two slots was chosen as a model cutting tool. Solid plates with a thickness of 5.5 mm made of layered fibrous polymer composite materials (fibreglass, carbon-fibre-reinforced plastic) were used as a preform. As a result of computer calculations, we obtained temperature fields of fibreglass and carbon-fibre-reinforced plastic during diamond drilling with the tubular tool. When studying the thermal behaviour of fibreglass and carbon-fibre-reinforced plastics, maximum temperature fields were located. The study revealed that the temperature reaches 413.6 K and 448.7 K during CFRP and fibreglass drilling, respectively. It was shown that the distance of heat transfer from the edge of the hole into the preform was 6.42 and 6.40 mm for CFRP and fibreglass, respectively. A method of modelling the thermal effects when cutting polymer composite materials developed in the COMSOL Multiphysics environment allows complex analytical calculations of temperatures induced by drilling to be simplified. In addition, it helps avoid overheating of a preform during drilling, allows the depth of heat distribution inside the preform from the edge of the formed hole in different polymer composite materials to be assessed. These measures lead to increasing the machining quality of polymer composite materials.

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Liu, Jin Hui, Hong Bin Liu, Yang Ju, Kai Pei Tian, Li Wang, Qin Gang Zhang, and Jiang Tao Zheng. "Temperature and Stress Fields of Reactive Powder Concrete under High Temperature." Applied Mechanics and Materials 174-177 (May 2012): 1193–98. http://dx.doi.org/10.4028/www.scientific.net/amm.174-177.1193.

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The temperature and stress fields of reactive powder concrete under high temperature are investigated using finite element analysis software COMSOL MULTIPHYSICS. In this simulation, the influence of variation of thermal parameters with temperature on the temperature and stress distribution is taken into account. The temperature and stress distribution are obtained. And the variation rule of numerical results shows very good agreement with the experimental data.

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Gosiewski, Zdzisław, and Piotr Kłoskowski. "Static Model of a Rail Launcher." Solid State Phenomena 147-149 (January 2009): 456–61. http://dx.doi.org/10.4028/www.scientific.net/ssp.147-149.456.

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The paper presents the analytic and simulation model of the rail launcher in a static state. The force acting on the projectile and the magnetic flux density were investigated. The mathematical description of the force acting on the projectile was derived. The simulation model was build with help of the COMSOL Multiphysics software. The computer simulation results were compared with the results obtained in the analytic way.

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Hashim, Ahmed A., Khalil I. Mahmoud, and Hussein M. Ridha. "Geometry and shape optimization of piezoelectric cantilever energy harvester using COMSOL multiphysics software." International Review of Applied Sciences and Engineering 12, no. 2 (May 29, 2021): 103–10. http://dx.doi.org/10.1556/1848.2021.00170.

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AbstractIn embedded systems that necessarily require a steady source of power and (or) attaches to a sensor(s), there are opportunities to mix small batteries to supply such power. The aim of this research is to optimize the geometry and shape of piezoelectric cantilevers to harvest more power. Several piezoelectric cantilever geometries with various shapes (rectangular, triangular, circular, and trapezoidal cross section) are tested in COMSOL multiphysics simulator to find the best geometry that provides the highest accomplishable power. The most efficient geometry was found to be conferred by the trapezoidal, cross section cantilever. Next, another improvement method was applied to maximize the harvested power of the cantilever by modifying the shape of the trapezoidal cantilever structure through increasing the number of its faces. The results demonstrated that the highest output power (36 mW) was produced by the four faces, trapezoidal cross section design of cantilever.

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Liu, Jian Jun, and Wan Lin Chen. "Generational Technology of Computational Grid in Porous Media Based on Digital Image." Advanced Materials Research 524-527 (May 2012): 1429–34. http://dx.doi.org/10.4028/www.scientific.net/amr.524-527.1429.

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Based on digital imaging processing technology, a generational method of computational grid of porous media is developed for numerical simulation. Transformation of original microscopical image from grayscale into binary one and vector-graph are used for reconstructing a geometric model of porous media. Computational grid of porous media geometry model by COMSOL Multiphysics software can provide an effective way for the latter finite element analysis of porous media.

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Stawicki, Krzysztof, Beata Szuflitowska, and Marcin Ziolkowski. "Recent simulation results of the magnetic induction tomography forward problem." Archives of Electrical Engineering 65, no. 2 (June 1, 2016): 327–36. http://dx.doi.org/10.1515/aee-2016-0024.

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Abstract In this paper we present the results of simulations of the Magnetic Induction Tomography (MIT) forward problem. Two complementary calculation techniques have been implemented and coupled, namely: the finite element method (applied in commercial software Comsol Multiphysics) and the second, algebraic manipulations on basic relationships of electromagnetism in Matlab. The developed combination saves a lot of time and makes a better use of the available computer resources.

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Vuckovic-Mladenovic, Ana, and Slavoljub Aleksic. "Magnetic field determination for different block permanent magnet systems." Facta universitatis - series: Electronics and Energetics 23, no. 3 (2010): 259–72. http://dx.doi.org/10.2298/fuee1003259v.

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The paper presents magnetic field calculation of three characteristic permanent magnet systems, which component parts are block magnets homogeneously magnetized in arbitrary direction. Method used in this publication is based on a system of equivalent magnetic dipoles. The results obtained using this analytical method are compared with results obtained using COMSOL Multiphysics software. Magnetic field and magnetic flux density distributions of permanent magnet systems are also shown in the paper.

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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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Alvarado-Rolon, O., R. Natividad, R. Romero, L. Hurtado, and A. Ramírez-Serrano. "Modelling and Simulation of the Radiant Field in an Annular Heterogeneous Photoreactor Using a Four-Flux Model." International Journal of Photoenergy 2018 (2018): 1–16. http://dx.doi.org/10.1155/2018/1678385.

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This work focuses on modeling and simulating the absorption and scattering of radiation in a photocatalytic annular reactor. To achieve so, a model based on four fluxes (FFM) of radiation in cylindrical coordinates to describe the radiant field is assessed. This model allows calculating the local volumetric rate energy absorption (LVREA) profiles when the reaction space of the reactors is not a thin film. The obtained results were compared to radiation experimental data from other authors and with the results obtained by discrete ordinate method (DOM) carried out with the Heat Transfer Module of Comsol Multiphysics® 4.4. The FFM showed a good agreement with the results of Monte Carlo method (MC) and the six-flux model (SFM). Through this model, the LVREA is obtained, which is an important parameter to establish the reaction rate equation. In this study, the photocatalytic oxidation of benzyl alcohol to benzaldehyde was carried out, and the kinetic equation for this process was obtained. To perform the simulation, the commercial software COMSOL Multiphysics v. 4.4 was employed.

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Lanin, V. L., V. T. Pham, and A. I. Lappo. "Through-silicon-via formation of 3D electronic modules by laser radiation." Doklady BGUIR 19, no. 3 (June 2, 2021): 58–65. http://dx.doi.org/10.35596/1729-7648-2021-19-3-58-65.

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Laser heating is a promising method for through-silicon-via (TSV) formation in assembling highdensity 3D electronic modules due to its high specific energy and local heating ability. Using laser radiation for the formation of TSV makes it possible to reduce its diameter, indirectly increases the density of elements in 3D electrical modules. Laser system selection depends on the physical and mechanical properties of the processed materials and on the technical requirements for laserprocessing. The reflectivity of most materials increases with the laser wavelength. It was found that with an increase in the initial temperature of the substrate, the TSV taper becomes larger. Simulation was performed in COMSOL Multiphysics 5.6 to conduct thermal distribution during TSV laser formation. By modeling thermal fields in the COMSOL Multiphysics 5.6 software for laser processing of silicon substrates and experimental studies, the parameters of laser radiation have been optimized to obtain a minimum hole taper coefficient in the substrates of 3D electronic modules. The optimal duration of exposure to laser radiation with a wavelength of 10.64 microns is less than 2 s with holes taper 0.1–0.2.

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Nowbahari, Arian, Avisek Roy, Muhammad Nadeem Akram, and Luca Marchetti. "Analysis of an Approximated Model for the Depletion Region Width of Planar Junctionless Transistors." Electronics 8, no. 12 (December 1, 2019): 1436. http://dx.doi.org/10.3390/electronics8121436.

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In this paper, we investigate the accuracy of the approximated analytical model currently utilized, by many researchers, to describe the depletion region width in planar junctionless transistors (PJLT). The proposed analysis was supported by numerical simulations performed in COMSOL Multiphysics software. By comparing the numerical results and the approximated analytical model of the depletion region width, we calculated that the model introduces a maximum RMS error equal to 90 % of the donor concentration in the substrate. The maximum error is achieved when the gate voltage approaches the threshold voltage ( V t h ) or when it approaches the flat band voltage ( V F B ) of the transistor. From these results, we concluded that this model cannot be used to determine accurately the flat-band and the threshold voltage of the transistor, although it represents a straightforward method to estimate the depletion region width in PJLT. By using the approximated analytical model, we extracted an analytical formula, which describes the electron concentration at the ideal boundary of the depletion region. This formula approximates the numerical data extracted from COMSOL with a relative error lower than 1 % . The proposed formula is in our opinion, as useful as the formula of the approximated analytical model because it allows for estimating the position of the depletion region also when the drain and source terminals are not grounded. We concluded that the analytical formula proposed at the end of this work could be useful to determine the position of the depletion region boundary in numerical simulations and in graphical representations provided by COMSOL Multiphysics software.

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Martínez-Valle, Álvaro, José M. Martínez-Jiménez, Patrick Goes, Koen Faes, and Wim De Waele. "Multiphysics Fully-Coupled Modelling of the Electromagnetic Compression of Steel Tubes." Advanced Materials Research 214 (February 2011): 31–39. http://dx.doi.org/10.4028/www.scientific.net/amr.214.31.

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This paper presents the development process of a fully-coupled multiphysics finite-element model of electromagnetic tube compression, using the commercial software Comsol Multiphysics. The presence of a field concentrator inside the solenoid coil is numerically modelled. First, the results of free compression of a S235 steel tube are presented. Next, the joining process of a S235 steel tube with an internal workpiece of the same material is considered by inclusion of a contact algorithm in the model. Simulation results are compared with available experimental data. The application of the model to materials with a high resistivity, such as steel, enables to identify interesting phenomena and opens new possibilities for the industrial application of this high velocity forming technique.

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Adam, Tijjani, U. Hashim, Pei Ling Loew, and K. L. Foo. "Design of 3D Micromixer for Bio-Synthesis Using COMSOL Multiphysics Software Package." Advanced Science Letters 19, no. 12 (December 1, 2013): 3454–58. http://dx.doi.org/10.1166/asl.2013.5214.

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Dickinson, Edmund J. F., Henrik Ekström, and Ed Fontes. "COMSOL Multiphysics®: Finite element software for electrochemical analysis. A mini-review." Electrochemistry Communications 40 (March 2014): 71–74. http://dx.doi.org/10.1016/j.elecom.2013.12.020.

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Yuan, Ting, Ulrich Mescheder, Wolfgang Kronast, and Chang Long Wang. "Optimization of Deformation Shape of an Active Electro-Optical Focusing Device." Advanced Materials Research 291-294 (July 2011): 3116–20. http://dx.doi.org/10.4028/www.scientific.net/amr.291-294.3116.

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Severe deformation which was induced by internal (residual) stress was observed on the MOEMS focusing device without driving voltage. Based on beam suspended membrane, FEM software COMSOL Multiphysics was used to predict the deformation induced by internal stress, model parameters (beam width and length), boundary condition of the chip. Found the parameters which can make the membrane be relative flat initially. Expanded the model including ring shaped electrode, using COMSOL coupled fields(AC/DC-Electrostatics module, Structural Mechanics-Solid Mechanics module and Mathematics-Deformed Mesh-Moving Mesh module), found the inner radius of ring shaped electrode which can get perfect parabolic shape of membrane with large maximum relative deflection under driving voltage.

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Song, Rong Chang, Gui Lei Wang, Jun Bo Wang, Yue Yue Shen, and Chao Lv. "Design and Simulation of High Efficient MEMS Electrothermal Actuator." Key Engineering Materials 562-565 (July 2013): 504–8. http://dx.doi.org/10.4028/www.scientific.net/kem.562-565.504.

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The paper mainly designs an efficient MEMS electrothermal actuator, with lower voltage input but large displacement output. The calculation method of the actuator considers the convection and radiation besides heat conduction mentioned in most literatures. With the multiphysics simulation by the software Comsol of electrothermal bimorph actuator, the transient effects of thermal convection and thermal radiation on the actuator displacement and the response characteristics of an actuator with a separate heating layer were studied.

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Семакова, А. А., С. Н. Липницкая, К. Д. Мынбаев, Н. Л. Баженов, С. С. Кижаев, А. В. Черняев, Н. Д. Стоянов, and H. Lipsanen. "Экспериментальное исследование и моделирование спектральных характеристик светодиодных гетероструктур с активной областью из InAs." Письма в журнал технической физики 46, no. 3 (2020): 51. http://dx.doi.org/10.21883/pjtf.2020.03.48994.17987.

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Spectral characteristics of InAs-based light-emitting diode (LED) heterostructures for the mid-infrared spectral range were studied both experimentally and theoretically, with the use of MATLAB software, and also modeled in COMSOL Multiphysics®. By comparing the results of experiments, calculations and modeling, a pattern of the formation of emission spectra of heterostructures was obtained. The obtained results confirm the prospects for the use of modeling in the design of LED structures.

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Journal articles on the topic 'COMSOL MULTIPHYSICS SOFTWARE'

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