Artigos de revistas: "Comsol Multiphysics"

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Palchikovskiy, Vadim, e Sergei Beloborodov. "On the Correct Generation of a Single Sound Mode in a Duct with Flow in COMSOL Multiphysics". E3S Web of Conferences 446 (2023): 01003. http://dx.doi.org/10.1051/e3sconf/202344601003.

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The paper considers the statement of a single-mode sound generation in a duct with flow in the COMSOL Multiphysics finite element analysis software. Verification of the COMSOL Multiphysics solution is based on a comparison with the analytical solution of a single-mode propagation in an annular duct with uniform flow. The verified statement of a single-mode generation in COMSOL Multiphysics is then used to predict the noise of a JT15D turbofan engine in the far field. The results of computations are compared with JT15D static test data and known numerical simulation results.

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SUKUVIHAR, Sanal, e Masanori HASHIGUCHI. "J031024 Multiphysics simulation of nano actuator with COMSOL Multiphysics". Proceedings of Mechanical Engineering Congress, Japan 2011 (2011): _J031024–1—_J031024–5. http://dx.doi.org/10.1299/jsmemecj.2011._j031024-1.

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Мелконов, Г. Л., e І. В. Мелконова. "Oсобливості моделювання механічних процесів за допомогою методу скінченних елементів в програмному середовищі COMSOL Multiphysics". ВІСНИК СХІДНОУКРАЇНСЬКОГО НАЦІОНАЛЬНОГО УНІВЕРСИТЕТУ імені Володимира Даля, n.º 4(260) (10 de março de 2020): 50–54. http://dx.doi.org/10.33216/1998-7927-2020-260-4-50-54.

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У статті наводиться огляд проблем, що зустрічаються при моделюванні механічних процесів. Так само проведено аналіз застосування модуля «Механіка конструкцій» в програмному середовищі COMSOL Multiphysics для вирішення механічних завдань на прикладі моделі яка представляє собою тонкий металевий лист, який вдавлюється в штамп за допомогою пуансона. При прокаті листового металу явище деформації – є важливим етапом в технологічному процесі. Тому в роботі показана можливість застосування моделювання механічних процесів, як можливість проводити експериментальні дослідження за допомогою COMSOL Multiphysics. Також в роботі поведено аналіз літературних джерел, в яких розглядається питання моделювання механічних і фізичних процесів не тільки в програмному середовищі COMSOL Multiphysics., але і в інших програмних продуктах.

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Adam, Tijjani, e U. Hashim. "COMSOL Multiphysics Simulation in Biomedical Engineering". Advanced Materials Research 832 (novembro de 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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Sirotkin, Vyacheslav V., Dmitriy A. Pigalev, Ivan V. Bol'shikh e Semyon S. Chernyaev. "Application of specialized software for calculation of magnetic field in the turns of switched reluctance motors stator windings". Modern Transportation Systems and Technologies 8, n.º 4 (24 de dezembro de 2022): 58–73. http://dx.doi.org/10.17816/transsyst20228458-73.

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Background: The article describes the process of occurrence of additional losses in the extreme turns of the copper stator windings, based on physical laws. The causes of the skin effect in the stator windings of a switched reluctance motor (SRM) are presented, an assessment of the skin effect influence degree on additional losses in the SRM of medium and high power. 2D-model of the SRM sector in COMSOL Multiphysics software package is created to specify distribution of magnetic field in the SRM stator windings and to quantify the amount of additional losses. А comparison of the magnetic field distribution of the SRM configuration 12/8 obtained in the FEMM program and the SRM magnetic field distribution built in COMSOL Multiphysics software package is presented to assess the reliability of the results. Aim: Calculation of the magnetic field distribution in the turns of the stator winding by building a phased 2D-model of the SRM sector (pole division) in COMSOL Multiphysics software package to quantify the amount of additional losses caused by eddy currents in the windings. Methods: COMSOL Multiphysics software package is used to build 2D-sector of the SRM. To obtain results on the distribution of electromagnetic fields within the simulated area, finite element methods (FEM) are used to estimate income adjustments, the results are compared with calculations in the FEMM program. Results: The patterns of the magnetic field distribution of the SRM obtained in COMSOL Multiphysics software package and in FEMM program confirm the presence of a skin-effect in the extreme turns of the stator winding. It can reduce the energy efficiency of the SRM and cause local overheating of the winding turns. As a result of the simulation, the picture of the magnetic field distribution of the SRM obtained in the FEMM program is similar to the picture of the magnetic field distribution of the SRM obtained in COMSOL Multiphysics software package. Ratio error of the values of the magnetic induction of different parts of the SRM is 37 %. It is acceptable and it indicates the correctness of computer modeling in COMSOL Multiphysics software package. Conclusion: The patterns of the magnetic field distribution SRM in COMSOL Multiphysics software package and in the FEMM program confirm the presence of the skin-effect in the extreme turns of the stator winding, which will allow further research in the field of determining the numerical values of additional losses using 2D-model, and proceed from 2D-model to 3D-model of the SRM.

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Sumit, Rahul Shukla e A. K. Sinha. "Finite element method coupled with TLBO for shape control optimization of piezoelectric bimorph in COMSOL Multiphysics". SIMULATION 97, n.º 9 (6 de julho de 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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VERKHOTUROVA, IRINA VLADIMIROVNA. "SIMULATION OF BODY FLOW WITH A SEPARATED LIQUID FLOW IN A COMSOL MULTIPHYSICS ENVIRONMENT". Messenger AmSU, n.º 93 (2021): 34–37. http://dx.doi.org/10.22250/jasu.93.7.

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The article presents the results of using the COMSOL Multiphysics environment to perform one of the laboratory works of the Aerodynamics module of the Hydrogas and Aerodynamics discipline. In the COMSOL Multiphysics environment, it is proposed to simulate the process of a laminar flow of a viscous incompressible fluid around bodies of various geometric shapes, which allows you to visually visualize the boundary layer, its separation from the surface of the streamlined body.

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Ibrokhimov, Abdulfatto, Khikmatilla Djumaev, Bakhtigul Artikova e Farkhod Abdukadirov. "Numerical study of particle motion in a two-dimensional channel with complex geometry". BIO Web of Conferences 84 (2024): 05037. http://dx.doi.org/10.1051/bioconf/20248405037.

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The article presents a study of the SST turbulence model in the Comsol Multiphysics software package for the problem of a two-dimensional channel with complex geometry. In this work, the finite element method is used for the numerical implementation of the turbulence equations. The implementation of the Comsol Multiphysics 6.1 software package showed good convergence, stability and high accuracy of the SST turbulence model.

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M ziou, Nassima, Hani Benguesmia e 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, n.º 1 (30 de junho de 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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Su, Rui, Yiming Zhang, Dong Zhang e Junxia Gao. "Simulation Analysis Based on COMSOL Helicopter Time-domain Aeromagnetic Method". Journal of Physics: Conference Series 2636, n.º 1 (1 de novembro de 2023): 012033. http://dx.doi.org/10.1088/1742-6596/2636/1/012033.

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Abstract This paper takes the time-domain aeromagnetic system as the research object and uses the finite element software COMSOL Multiphysics 6.0 to establish the three-dimensional system model. By comparing the COMSOL Multiphysics forward simulation solution with the one-dimensional numerical solution, it verifies that the COMSOL software meets the simulation accuracy requirements of the three-dimensional time-domain aeromagnetic method, and focuses on the analysis of the transient response at different flight altitudes is also analyzed. Based on the analysis of this paper, a set of aeromagnetic parameters with high detection capability is determined for engineering practice, and a test of the system is completed.

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González-García, Raúl, Rumen I. Tsonchev, Miguel A. Ruiz-Cabrera, Alicia Grajales-Lagunes, José J. Villa-Hernández e Daniel Alaniz-Lumbreras. "A Linearized Analytical Solution Of PDE Heat Transfer In A Solid Material Excited By Light With Radiant Thermal Losses". South Florida Journal of Development 3, n.º 1 (18 de janeiro de 2022): 458–75. http://dx.doi.org/10.46932/sfjdv3n1-035.

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A method to linearize partial differential equations (PDEs) of heat diffusion and its initial with boundary conditions in a wide interval of temperature is presented. Thus, an analytical solution of the heat conduction problem was achieved in a virtual experiment performed in a lead wall with an ideally established configuration. For other arrangements where an analytical solution is not possible, simple standard programs can be used as an alternative to solve the linearized partial differential equations obtained with the proposed method. A sophisticated computer program as the standard gold method of COMSOL Multiphysics® was used for the evaluation of error of procedure. It was validated that the relative error of the analytical solution, in comparison to the digital simulation with COMSOL Multiphysics, can be found without the need to own and use the COMSOL Multiphysics program. For our configuration, the error is 1.16 % and focuses on the initial part of the process.

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Wu, Jianwen, Zhen Meng, Xingcheng Zhang, Wei Mi e Yuepeng Yan. "Capacitive Angle Sensor Research Using COMSOL Multiphysics". Applied Sciences 13, n.º 5 (24 de fevereiro de 2023): 2937. http://dx.doi.org/10.3390/app13052937.

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This paper presents a method of simulating a capacitive sensor using COMSOL Multiphysics. A petal-form sensitive electrode structure applied to a capacitive angle sensor was simulated using COMSOL software; the angle was calculated using sines and cosines with capacitance value to fill in the simulation of the capacitive angle sensor. First, according to the construction principle of the sensor structure, a GeoGebra graphing calculator with theoretical analysis and expression of function was used to obtain the two-dimensional structure of the target petal-form sensitive structure. Second, the holistic structural model was completed by importing it into COMSOL Multiphysics and setting the electrical and mechanical rotation parameters, which realized the simulation of the rotation process. Finally, because errors were found, the structure design was improved by introducing an angle between the partition domain, and the simulation errors were reduced. The resulting curves and calculated angles were consistent with the theory; the simulation results showed that the maximum angle difference value was 0.0175° and the minimum angle difference value was 0.0018° of a single cycle structure.

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Dudarev, Aleksandr S. "Calculation of Thermal Fields when Drilling Small-Sized Holes in Carbon Fiber Reinforced Plastic". E3S Web of Conferences 398 (2023): 01036. http://dx.doi.org/10.1051/e3sconf/202339801036.

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The Purpose of the paper. The study of thermal physics of the process of drilling polymer composite materials based on the capabilities of the engineering package Comsol Multiphysics. Determination of the values of temperatures arising in the cutting zone when drilling with a cutting tool in polymer composite materials, namely, in carbon fiber. Establishment of the depth of heat propagation inside the workpiece from the edge of the formed hole of the polymer composite material. In this work, the Fourier heat equations are used. Numerical simulation of the drilling process wascarried out in the engineering package COMSOL Multiphysics. A technique for modeling thermal effects during drilling of carbon fiber reinforced plastics in the Comsol Multiphysics environment has been developed. As a result of computer calculation, temperature fields were obtained at the edge of the carbon fiber reinforced plastic hole. The study of the thermal state of carbon plastics has been carried out. On the basis of the conducted research, it was revealed that the temperature during drilling of carbon fiber reaches 650 K. The distance over which heat spreads from the edges of the hole into the workpiece for carbon fiber is 3 mm. The developed technique for modeling the thermal impact of cutting polymer composite materials in the COMSOL Multiphysics environment can significantly simplify complex analytical calculations, help to avoid overheating of the part during drilling, which improves the quality of processing.

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Kolomeytsev, Andrey, Pavel Baranov e 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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Gorbynov, V. A., D. O. Fomichev, A. R. Masev e E. V. Kraynov. "Assessment of feasibility of using COMSOL software for modeling thermalhydraulic processes in WWER reactors". Vestnik IGEU 2 (30 de abril de 2024): 15–23. http://dx.doi.org/10.17588/2072-2672.2024.2.015-023.

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Thermophysical modeling software packages are widely used for modeling various thermohydraulic processes including modeling nuclear reactor fuel element. Verification of such calculations is possible only if we compare the results obtained in different packages (cross-verification) due to the extreme complexity or impossibility to carry out analytical calculations or experiments. It seems relevant to carry out cross-verification of calculations of WWER reactor fuel elements in COMSOL Multiphysics software package using another popular ANSYS software package. Models of fuel elements for the analysis of thermohydraulic processes are developed using thermophysical modeling packages ANSYS Fluent and COMSOL Multiphysics for cross-verification of calculation results in the latter. Modeling of temperature fields is carried out based on the heat conduction equation with an internal heat source. The authors have considered several formulations of problems: with fuel element cladding and without it and the central hole in the fuel. Models of fuel elements of the WWER-1000 reactor have been designed for three formulations of problems with different designs in ANSYS Fluent and COMSOL Multiphysics software packages. Temperature fields have been determined using the finite element method. The results of the calculations of the fuel core maximum temperature are presented and compared for two software packages. The maximum relative deviation of the temperatures obtained is 0,97 %. A comparison of the temperature calculations results obtained using models developed in two packages shows that the relative deviation of the values corresponds to the error of the measuring instruments. It confirms that COMSOL Multiphysics can be successfully used to simulate processes in WWER reactors along with ANSYS Fluent.

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Mozafari, B., M. Fahs, B. Ataie-Ashtiani, C. T. Simmons e 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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Yu, Xiaoming, Zhaoxin Guo e Haowei Yi. "Design of TaCu alloy coating for orthopaedic materials and study on dissolution behavior of copper ions". Journal of Physics: Conference Series 2459, n.º 1 (1 de março de 2023): 012012. http://dx.doi.org/10.1088/1742-6596/2459/1/012012.

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Abstract In this study, tantalum copper (TaCu) alloy coating was designed and fabricated by the chemical vapor deposition (CVD) method, while the process was explored through COMSOL Multiphysics software. The influence of deposition temperature on coating quality was studied in combination with our previous work. In addition, the galvanic corrosion behavior of TaCu coating in Hank’s solution was simulated through this software. The COMSOL Multiphysical software can be used to simulate the process that TaCu coated on the surface of titanium(Ti) alloy substrate by chemical vapor deposition. The deposition quality was affected by the direction of the deposition airflow. Cu ion dissolution makes the coating thickness decrease uniformly, Cu ion dissolution accelerates due to galvanic corrosion, and the antibacterial ability of the coating can be improved due to Cu ion dissolution.

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Ozana, Stepan, Martin Pies e Radovan Hajovsky. "Using MATLAB and COMSOL Multiphysics for Optimization of the Model of Underground Thermal Processes at Old Mining Dumps". Applied Mechanics and Materials 548-549 (abril de 2014): 571–78. http://dx.doi.org/10.4028/www.scientific.net/amm.548-549.571.

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The paper deals with the use of MATLAB and COMSOL Multiphysics environments for solution of optimization problem regarding underground thermal processes occurring at the old mining dumps affected by subsurface endogenous fires. It gives the description of measurement system and physical setup of the experimental borehole used to provide the real measured data for the model with the aim of its verification. The optimization problem is defined and solved by proposed computational technique that uses both MATLAB and COMSOL Multiphysics with the LiveLink tool that integrates these environments. Results of the optimization help to evaluate the total or relative heat power of the mass within mining dump.

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Ariffin, Shahrul A. B., U. Hashim e Tijjani Adam. "Designing Microchannels Separator Mask for Lithography Process". Advanced Materials Research 795 (setembro de 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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Xie, Jing, Yi-An Cui, Yijian Luo, Lijuan Zhang e Hang Chen. "Electrical Resistivity Tomography for Urban Underground Space by COMSOL Multiphysics". Journal of Physics: Conference Series 2651, n.º 1 (1 de dezembro de 2023): 012017. http://dx.doi.org/10.1088/1742-6596/2651/1/012017.

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Abstract The development and utilization of urban underground space are of great significance to urban sustainable development. Geophysical methods have the characteristics of non-destructive detection, and electrical resistivity tomography has an obvious response to underground resistivity structure and can be used in urban underground space exploration. In this paper, COMSOL Multiphysics is used to realize the finite-element simulation of geoelectric models, and electrical resistivity tomography is used to explore resistivity anomalies of karst and fault models in urban underground environments. The results show that electrical resistivity tomography can identify karst and fault distribution effectively, and COMSOL Multiphysics promises to be a powerful tool for exploring urban underground space.

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Madaliev, Murodil, Mavlonbek Usmonov, Jamshidbek Otajonov, Inomjan Bilolov, Zamira Otakhanova, Khurshida Rajabova e Sharabiddin Israilov. "The effect of slip on the development of flow separation due to a bump in a channel based on a two-fluid turbulence model". E3S Web of Conferences 508 (2024): 06003. http://dx.doi.org/10.1051/e3sconf/202450806003.

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In the paper, two-fluid turbulence model simulations were used to calculate the flow of a statistically two-dimensional turbulent boundary layer over a hump. In this work, the finite element method is used for the numerical implementation of the turbulence equations. Galerkin least squares (GLS) stabilization was used to stabilize the discretized equations. The results of the two fluid models were compared with experimental measurements by Matai, R., Durbin P. A. and the SST turbulence model which exists in the Comsol Multiphysics software package. The implementation of the Comsol Multiphysics software package showed the stability and good accuracy of the two-fluid turbulence model than the SST turbulence model.

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Li, Yuteng, Bici Jiang, Tao Fan, Lei Liu, Xiaochao Tian e Zhe Fang. "Forward Modeling of Ground Penetrating Radar (GPR) Data with The COMSOL RF Module". Journal of Physics: Conference Series 2651, n.º 1 (1 de dezembro de 2023): 012047. http://dx.doi.org/10.1088/1742-6596/2651/1/012047.

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Abstract COMSOL Multiphysics is one of the most popular multi-physics numerical calculation software. The forward modeling of GPR is realized based on COMSOL RF module, and the layered strata are simulated and verified by using Rake wavelet with center frequency of 400 MHz. The results show that the numerical simulation method of GPR established by COMSOL RF module has high calculation accuracy, which is helpful to study the propagation law of electromagnetic waves.

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Dragan, Razvan Gabriel, Ileana Constanta Rosca, Diana Cazangiu e Alexandru Stefan Leonte. "Thermal Response for a Reinforced Concrete Slab Analyzed with Active Infrared Thermography and Comsol Multiphysics". Applied Mechanics and Materials 760 (maio de 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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Cadena, A. F., J. S. Mendoza e H. F. Ibáñez. "COMSOL modeling of the lightning-generated electric field distribution in a chain of insulators of a 115 kV power transmission line". Journal of Physics: Conference Series 2135, n.º 1 (1 de dezembro de 2021): 012006. http://dx.doi.org/10.1088/1742-6596/2135/1/012006.

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Abstract The transmission lines installed in our city, to the outskirts of it and in the rest of the national territory produce a level of emissions of electric field, these levels vary depending on the physical disposition of the drivers, the distance between spans, the voltage level of the line, among others. These values must respect the exposure limits for individuals, as stipulated in Article 14 of RETIE. In this work will be developed a study of distribution of the electric field along a chain of insulators standard of tempered glass of a transmission line of 115 kV with the aid of the software COMSOL Multiphysics, to the impact of an atmospheric discharge on the storage cable with the help of ATPDraw software, taking into account variations in the value of the earthing resistance of the structure. With the electric field distribution values obtained by means of simulations carried out in the COMSOL Multiphysics software, comparisons are made of the magnitude of the obtained field, taking as a reference the stable state of the system without condition of pollutants. Initially a simulation of a transmission line of 115 kV is performed in the ATPDraw software, analyzing the lightning impulse generated on the guard cable, at different values of grounding resistance, to determine the waveform and reached value of overvoltage in the insulator chain. Then the overvoltage signal obtained with the help of ATPDraw software is recreated in the COMSOL Multiphysics software, to be able to visualize the distribution and behavior of the electric field along the chain, taking into account the different factors involved in the process, pollutants such as salinity, themes such as travelling waves etc. and thus determine possible line isolation failures by comparing the values achieved by simulating in COMSOL Multiphysics with respect to the CFO of the insulator chain.

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OCILKA, Matúš, e Dobroslav KOVÁČ. "SIMULATION MODEL OF INDUCTION HEATING IN COMSOL MULTIPHYSICS". Acta Electrotechnica et Informatica 15, n.º 1 (1 de março de 2015): 29–33. http://dx.doi.org/10.15546/aeei-2015-0005.

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Digieneni, Yousuo, Igbani Sunday e Oyazimo Clevis Ekiokeowei. "A study of the Effect of the Weight of a Fixed-Bed Adsorption Column for Removal of Ferrous Iron (Fe2+) in Groundwater using Activated Carbon". International Journal of Engineering and Modern Technology 8, n.º 4 (23 de agosto de 2023): 33–38. http://dx.doi.org/10.56201/ijemt.v8.no4.2022.pg33.38.

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The study involves the simulation of a fixed-bed adsorption column with COMSOL Multiphysics software. The bed of the Adsorption column was filled with only activated carbon to absorb the ferrous Iron. The equilibrium and dynamic model equations of the Langmuir adsorption isotherm and fixed-bed adsorption column were used and inputted into the COMSOL Multiphysics software. Line graphs and 2D surface plots were generated from the software after the simulation. Simulated result showed that increase in the weight of the bed could increase the bed performance and indicated that about 28 days’ operative performance of the bed could be achieved for a bed weight of 1500kg and particle size of 0.001m.

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Veselova, Elena, Anna Maslovskaya e Alexander Chebotarev. "Size-Dependent Switching in Thin Ferroelectric Films: Mathematical Aspects and Finite Element Simulation". Computation 11, n.º 1 (15 de janeiro de 2023): 14. http://dx.doi.org/10.3390/computation11010014.

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The paper is devoted to the theoretical analysis and numerical implementation of a mathematical model of a nonlinear reaction–diffusion system on the COMSOL Multiphysics platform. The applied problem of the computer simulation of polarization switching in thin ferroelectric films is considered. The model is based on the Landau–Ginzburg–Devonshire–Khalatnikov thermodynamic approach and formalized as an initial-boundary value problem for a semilinear parabolic partial differential equation. The theoretical foundations of the model were explained. The user interface design application was developed with COMSOL Multiphysics. A series of computational experiments was performed to study the ferroelectric hysteresis and temperature dependences of polarization on the example of a ferroelectric barium titanate film.

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Zaiton, A. M., F. Jasman e W. H. W. Hassan. "Application of COMSOL Multiphysics for Fiber Beam Profiling". Journal of Telecommunication, Electronic and Computer Engineering (JTEC) 15, n.º 4 (30 de dezembro de 2023): 7–11. http://dx.doi.org/10.54554/jtec.2023.15.04.002.

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Fiber optic beam profiling is essential across scientific and engineering realms, demanding precise characterization of light beams for optimized system performance, accurate alignment, and efficient resource utilization. This study employs COMSOL Multiphysics to comprehensively analyze single-mode and multimode fiber beam profiles, encompassing diverse parameters such as wavelengths and modal distributions. The investigation of beam profiles is based on 850nm, 1310nm and 1550nm wavelengths; with three different modes (1, 5, and 20). COMSOL Multiphysics enhances beam profiling by providing precise numerical techniques, multiphysics modeling, and flexible parameter analysis. Its user-friendly interface facilitates efficient research, while validation and innovative possibilities underscore its value in photonics advancements. The research addresses the need for advanced profiling techniques, offering a robust methodology that captures intricate modal interactions and boundary conditions. Key findings include distinctive beam waist evolution, mode distribution patterns, and beam shaping behaviors, impacting data transmission, medical procedures, and manufacturing. By integrating computational power, this study advances our understanding of photonics, providing practical insights for future fiber optic technologies and their broader implications.

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Verkhoturova, Irina Vladimirovna. "COMSOL MULTIPHYSICS IN AERODINAMICS LABORATORY WORKSHOP". Messenger AmSU, n.º 101 (2023): 75–77. http://dx.doi.org/10.22250/20730268_2023_101_75.

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Яворський, Н. Б., e Н. А. Андрущак. "Моделювання дисперсійних співвідношень пористих композиційних матеріалів на підставі коміркових мікрорівневих структурних моделей". Scientific Bulletin of UNFU 30, n.º 1 (27 de fevereiro de 2020): 142–51. http://dx.doi.org/10.36930/40300125.

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Описано розроблений авторами набір засобів та алгоритмів їх використання для синтезу дисперсійних характеристик мікрорівневих коміркових моделей пористих композиційних матеріалів за допомогою використання інженерної системи числового аналізу COMSOL Multiphysics. Структуру композитів описано комірковими моделями, що будуються у вигляді тривимірних матриць комірок-вокселів. За достатньо великої дискретизації такі моделі дають змогу досліджувати будь-які структурні неоднорідності компонентів композиту. Розроблено засоби та алгоритм синтезу мікрорівневих структурних моделей та їх експорту в промислові інженерні системи числового аналізу методом скінченних елементів. Підсистема експорту базується на форматі даних NASTRAN, що забезпечує високий рівень інтеграції з майже всіма сучасними системами інженерних розрахунків, зокрема, таких, як COMSOL Multiphysics. На підставі моделі системи COMSOL, для дослідження електромагнітних хвиль у частотній області, розроблено алгоритм синтезу дисперсійних співвідношень для елементарних об'ємів композитів із перпендикулярними сторонами, що містять періодичні структури з довільною симетрією. Частковим випадком таких об'ємів є мікрорівневі моделі пористих композитів. Такий підхід дає змогу єдиним чином досліджувати багато складних структур, що становить наукову новизну та практичну цінність. Отримані результати добре узгоджуються з контрольними прикладами.

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Alkaabi, Ahmed K., e Jeffrey C. King. "Benchmarking COMSOL Multiphysics Single-Subchannel Thermal-Hydraulic Analysis of a TRIGA Reactor with RELAP5 Results and Experimental Data". Science and Technology of Nuclear Installations 2019 (20 de agosto de 2019): 1–14. http://dx.doi.org/10.1155/2019/4375782.

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COMSOL Multiphysics has been used to conduct thermal-hydraulic analysis in multiple nuclear applications. The aim of this study is to benchmark the prediction accuracy of COMSOL Multiphysics in performing thermal-hydraulic analysis of TRIGA (Training, Research, Isotopes, General Atomics) reactors such as the Geological Survey TRIGA Reactor (GSTR) by comparing its predictions with RELAP5 (a widely used code in nuclear thermal-hydraulic analysis) results and experimental data. The GSTR type is Mark I with a full thermal power of 1 MW, and it resides at the Denver Federal Center (DFC) in Colorado. The numerical investigation of the present work is carried out by developing single-subchannel thermal-hydraulic models of the GSTR utilizing RELAP5 and COMSOL codes. The models estimate the temperatures (fuel, outer clad, and coolant) and water flow patterns in the core as well as fuel element powers at which void starts to form within the coolant subchannels. Then, these models’ predictions are quantitatively evaluated and compared with the measured data.

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Ndoumbe, Jean, Emeric Tchamdjio Nkouetcha e Jean Gabriel Ologo Emboueme. "FEM Analysis of the Electric Field and Potential of Various Types of Insulators under Uniform Pollution". International Journal of Research and Review 10, n.º 8 (1 de setembro de 2023): 1061–68. http://dx.doi.org/10.52403/ijrr.202308134.

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This work aims to present an analysis of the behaviour of the electric field and the potential for three different types of insulators, the glass, the porcelain and the polymeric. Since pollution is an important factor for their insulation performance and reliability in high-voltage systems, it is essential to understand how a uniform pollution layer could influence the distribution of the field and the electric potential for each of these insulators. For this purpose, COMSOL Multiphysics was used to study these distributions in both clean and polluted conditions, using the finite element method. The results show that the uniform pollution layer reduces the distribution of the electric field of insulator. Keywords: COMSOL Multiphysics; electric field; finite element method; glass insulator; porcelain insulator; silicone insulator; uniform pollution

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Asmi, Ade, Jouvan Chandra Pratama Putra e Ismail Abdul Rahman. "Simulation of Room Airflow Using Comsol Multiphysics Software". Applied Mechanics and Materials 465-466 (dezembro de 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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Saurabh, Siddharth, M. Khalid Hossain, Sadhna Singh, Suneet Kumar Agnihotri e D. P. Samajdar. "Optical performance analysis of InP nanostructures for photovoltaic applications". RSC Advances 13, n.º 15 (2023): 9878–91. http://dx.doi.org/10.1039/d3ra00039g.

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The optical performance of different indium phosphide (InP) nanostructures are investigated using Wave Optics Module of COMSOL Multiphysics. Our results indicate that InP based nanostructures outperform silicon based nanostructures.

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Sidi Omar, Siti Fadzillah Nurain, Norhafizah Burham e Anees Abdul Aziz. "Simulation of Heat Transfer Response on Single Leg Themoelectric Materials Behaviour". Materials Science Forum 1055 (4 de março de 2022): 69–75. http://dx.doi.org/10.4028/p-48369p.

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Heat transfer simulation in Bi2Te3, Ca2FeMoO6, and SrTiO3 solid module single-leg had been investigated using COMSOL Multiphysics package. The software COMSOL Multiphysics was used to investigate the temperature distribution, electrical potential distribution, power output, and current vs temperature throughout the length of the sample for Bi2Te3, Ca2FeMoO6, and SrTiO3 which one of these three materials was showing potential as TE materials. The simulation showed that the perovskite material Ca2FeMoO6 and SrTiO3 had shown a net temperature difference across lengths of +191.943°C and +7.54°C while Bi2Te3 showed a net temperature difference of -60°C. Next, in electrical potential distribution across the length, Ca2FeMoO6 and SrTiO3 produced a higher voltage of 170mV and 160mV, while Bi2Te3 produced 49mV. The values of the power output for the three materials were calculated with 0.7A input current. It was found that Ca2FeMoO6, SrTiO3, and Bi2Te3 generated 119mW, 113mW, and 34mW in the simulation. The simulation results revealed that the Bi2Te3 is a p-type thermoelectric element and has the potential use in cooling due to Peltier cooling effect. However, Ca2FeMoO6 and SrTiO3 are n-type thermoelectric elements with a heating effect. The simulation and investigation of TE material using COMSOL Multiphysics showed more potentials and helped to explore, predicted and evaluated the conditions for other new TE materials.

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Samadinasab, Sajad, Farhad Namdari e Mohammad Bakhshipor. "The Influence of Moisture and Temperature on the Behavior of Soil Resistivity in Earthing Design Using Finite Element Method". Indonesian Journal of Electrical Engineering and Computer Science 2, n.º 1 (1 de abril de 2016): 11. http://dx.doi.org/10.11591/ijeecs.v2.i1.pp11-22.

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<p>Protection of equipment, safety of persons and continuity of power supply are the main objectives of the grounding system. For its accurate design, it is essential to determine the potential distribution on the earth surface and the equivalent resistance of the system. The knowledge of such parameters allows checking the security offered by the grounding system when there is a failure in the power systems.A new method to design an earthing systems using Finite Element Method (FEM) is presented in this article.In this approach, the influence of the moisture and temperature on the behavior of soil resistivity are considered in EARTHING system DESIGN. The earthing system is considered to be a rod electrode and a plate type electrode buried vertically in the ground.The resistance of the system which is a very important factor in the design process is calculated using Finite Element Method. Finite Element Method is used to estimate the solution of the partial differential equation that governs the system behavior. COMSOL Multiphysics 4.4 which is one of the packages that work with the FEM is used as a tool in this design.Finally the values of the resistance obtained by COMSOL Multiphysics are compared with the proven analytical formula values for the ground resistance, in order to prove the work done with COMSOL Multiphysics.</p>

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Cristea, Bogdan Ionuț, Daniel Ghiculescu e Dumitru Mnerie. "Thermal and Mechanical Influence of Ultrasonically Aided Electrical Discharge Machining on Co-Cr Alloys". Advanced Materials Research 1157 (fevereiro de 2020): 93–107. http://dx.doi.org/10.4028/www.scientific.net/amr.1157.93.

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The paper reviews machining of CoCr alloys by electric discharge machining and ultrasonic aided discharge machining. The removal mechanism is discussed, modeled with Comsol Multiphysics and validated using experimental data.

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Mukhanov, Bakhyt K., Zhanar Zh Omirbekova, Azamat K. Usenov e Waldemar Wójcik. "Simulating In-Situ Leaching Process Using Comsol Multiphysics". International Journal of Electronics and Telecommunications 60, n.º 3 (28 de outubro de 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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Amar, Abdelhamid, Bouchaïb Radi e Abdelkhalak El Hami. "Optimization based on electro-thermo-mechanical modeling of the high electron mobility transistor (HEMT)". International Journal for Simulation and Multidisciplinary Design Optimization 13 (2022): 2. http://dx.doi.org/10.1051/smdo/2021035.

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The electro-thermomechanical modeling study of the High Electron Mobility Transistor (HEMT) has been presented, all the necessary equations are detailed and coupled. This proposed modeling by the finite element method using the Comsol multiphysics software, allowed to study the multiphysics behaviour of the transistor and to observe the different degradations in the structure of the component. Then, an optimization study is necessary to avoid failures in the transistor. In this work, we have used the Covariance Matrix Adaptation-Evolution Strategy (CMA-ES) method to solve the optimization problem, but it requires a very important computing time. Therefore, we proposed the kriging assisted CMA-ES method (KA-CMA-ES), it is an integration of the kriging metamodel in the CMA-ES method, it allows us to solve the problem of optimization and overcome the constraint of calculation time. All these methods are well detailed in this paper. The coupling of the finite element model developed on Comsol Multiphysics and the KA-CMA-ES method on Matlab software, allowed to optimize the multiphysics behaviour of the transistors. We made a comparison between the results of the numerical simulations of the initial state and the optimal state of the component. It was found that the proposed KA-CMA-ES method is efficient in solving optimization problems.

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Мелконов, Г. Л. "Використання модуля «композитні матеріали» у програмному комплексі COMSOL multiphysics". Вісник Східноукраїнського національного університету імені Володимира Даля, n.º 3(273) (15 de maio de 2022): 12–16. http://dx.doi.org/10.33216/1998-7927-2022-273-3-12-16.

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У роботі проаналізовано питання що до використання композитних матеріалів в різних галузях промисловості. Широке використання композитних матеріалів пов’язано з можливістю формувати електричні та механічні характеристики таких матеріалів шляхом підбору їх якісного і кількісного складу, форми частинок компонентів, геометрії взаємного розміщення (зв’язності) компонентів. В залежності від зв’язності компонентів можливі три основних ефекти взаємодії їх властивостей: ефект суми, ефект комбінації та ефект добутку, що дозволяє не лише підсилювати або послаблювати у композитному матеріалі властивості його компонентів, але і отримувати принципово нові властивості, яких не мають компоненти композиту. Однак розрахунок таких структур є складною задачею, яка вимагає дуже високої кваліфікації розробника і великих затрат часу та обчислювальних ресурсів. Тому дана робота напрямлена на вирішення важливої технічної проблеми за допомогою використання сучасного програмного комплексу COMSOL Multiphysics, та створення адаптованого до інженерного використання системного підходу до розробки композитних компонентів для різних галузей промисловості. У статті розглядаються питання запровадження використаннямодуля «Композитні матеріали» для розрахунку складних інженерних задач. Пропонується алгоритм розрахунку композитних матеріалів в програмному комплексі COMSOL Multiphysics та впровадження цього алгоритму для розрахунку різних типів задач. При використанні модуля «Композитні матеріали» використовуввючи спільно з іншими модулями програмного забезпечення COMSOL у розрахункових моделях э можливысть врахувувати процеси теплопередачі, електромагнетизму, гідродинаміки та акустики, все це можна зробити в єдиному середовищі для чисельного моделювання. В роботі показана можливість використання інтерфейсу різних інтерфейсів, в тому числі і інтерфейсу Shell, що розширюються за допомогою моделі матеріалу Layered Linear Elastic Material, яка обчислює властивості гомогенізованого матеріалу всього композиту та вирішує лише для серединної площини.

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Just, Krzysztof, Paweł Piskur e Mariusz Żokowski. "Dynamic Analysis of the Tubular Linear Actuator With Permanent Magnets". Scientific Journal of Polish Naval Academy 216, n.º 1 (1 de março de 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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Wesam Al-Mufti, M., U. Hashim e Tijjani Adam. "The State of the Arts: Simulation of Nanostructures Using COMSOL Multiphysics". Advanced Materials Research 832 (novembro de 2013): 206–11. http://dx.doi.org/10.4028/www.scientific.net/amr.832.206.

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Currently, Computer simulation has become an essential part of nanotechnology and engineering and science. Digital analysis of components, in particular, is important when developing new products or optimizing designs. Today a broad spectrum of options for simulation is available; researchers use everything from basic programming languages to various high-level packages implementing advanced methods. Though each of these techniques has its own unique attributes, they all share a common concern. Hence, the paper present a COMSOL simulation on nanostructures, the past and recent development nanostructures design and simulation for nanogap, nonporous, nanowires and carbon Nanotube. Keywords; Nanostructures. COMSOL Multiphysics, Nanowire, Nanogap, Nanotechnology.

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Warsito, I. F., H. Widyaputera, E. Supriyanto, J. Pusppanathan, M. A. A. Taib e 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 (13 de novembro de 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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Muhammad Abu Bakar Sidik, Djulil Amri, Muhammad Irfan Jambak, Dinda Sintia Dewi, Rizda Fitri Kurnia, Gina Rizky Lestari e Mohd Hafizi Ahmad. "Comsol Multiphysics Application For Estimating Ozone Concentration In A Chamber With Plane Electrodes". Jurnal Rekayasa Elektro Sriwijaya 3, n.º 2 (31 de maio de 2022): 209–14. http://dx.doi.org/10.36706/jres.v3i2.50.

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Berbagai kajian dan penelitian telah dilakukan terhadap pembangkitan plasma ozon menggunakan Metode Dielectric Barrier Discharge (DBD) dengan kondisi plasma non termal. Metode DBD memiliki berbagai keunggulan seperti distribusi medan listrik yang seragam pada penghalang dielektrik dalam menghasilkan plasma. Dalam studi ini, aplikasi COMSOL Multiphysics digunakan untuk melakukan pemeriksaan plasma ozon dari Ozone Chamber - yang terdiri dari elektroda plat aluminium berlubang dengan salah satu elektroda konfigurasi berlubang yang dipisahkan oleh dielektrik kaca tunggal. Perangkat lunak COMSOL Multiphysics memiliki Modul Plasma yang mencakup parameter elektrostatis, difusi drift, dan transportasi spesies berat untuk menghasilkan pelepasan pada O2 murni dengan keluaran konsentrasi ozon plasma. Dari hasil analisis simulasi diperoleh konsentrasi ozon tertinggi sebesar 3710,476 ppm pada tegangan masukan 8 kV dan konsentrasi terendah sebesar 3682,598 pada tegangan masukan 5 kV. Hal tersebut menunjukkan bahwa tegangan yang diberikan pada elektroda memiliki korelasi linier dengan konsentrasi ozon yang dihasilkan.

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Li, Gen, Chenggong Wang, Minghui Jiang, Lin Li e Ruiqi Wang. "Numerical Simulation of Deterioration Process in Reinforced Concrete Based on COMSOL Multiphysics". Journal of Physics: Conference Series 2736, n.º 1 (1 de março de 2024): 012006. http://dx.doi.org/10.1088/1742-6596/2736/1/012006.

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Abstract Reinforced concrete is deteriorated by chloride attack and dry-wet cycles to suffer serious durability problems. Reinforced concrete degradation typically occurs in two distinct stages: initially through chloride erosion, followed by the electrochemical corrosion of rebars. In this research, COMSOL Multiphysics was employed to model how various crack widths impact the degradation of reinforced concrete. Findings indicated that the deterioration process of reinforced concrete could be better simulated by COMSOL Multiphysics, and the degradation of reinforced concrete was significantly influenced by crack widths. As crack widths widen, chloride diffusion accelerated, leading to a rise in the corrosion current density of rebars. Notably, a crack width increased from 0.1 mm to 0.4 mm resulted in a 227.53% higher corrosion current density in rebars after 150 days of exposure. This study provides a theoretical basis for predicting reinforced concrete deterioration in the future.

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Li, A., e S. L. Butler. "Forward modeling of magnetotellurics using Comsol Multiphysics". Applied Computing and Geosciences 12 (dezembro de 2021): 100073. http://dx.doi.org/10.1016/j.acags.2021.100073.

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Belov, A. V., O. V. Kopchenov, A. O. Skachkov e D. E. Ushakov. "Solid-state explosion simulation in COMSOL Multiphysics". Multiphase Systems 14, n.º 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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Hashim, U., M. Wesam Al-Mufti e Tijjani Adam. "Current Trend in Simulation: A Study Simulation of Poly-Silicon Nanowire Using COMSOL Multiphysics". Advanced Materials Research 795 (setembro de 2013): 669–73. http://dx.doi.org/10.4028/www.scientific.net/amr.795.669.

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Poly-Silicon nanowire (Poly-Si-NW) simulations are very important field of nanotechnology and nanostructures; in this paper presented review in general nanowire and it applications such as thermoelectric device (TED) has potential applications in areas such as chip level cooling/ energy harvesting and many more applications in this field .COMSOL multiphysics is one of programmers using for nanotechnology and nanowires simulation, hence in this review paper, COMSOL simulation with different types of materials using for nanowire and other structures. Also In this work, we explore the effect of the electrical contact resistance on the performance of a TED. COMSOL simulations are performed on Poly-SiNW to investigate such effects on its cooling performance. Intrinsically, Poly-SiNW individually without the unwanted parasitic effect has excellent cooling power density. However, the cooling effect is undermined with the contribution of the electrical contact resistance.

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Yuan, Li Tao, Ming Li Sun, Liang Dao Tang e Guang Ming Cheng. "Simulation Analysis of Linear Electric Motor of the Moving Coil Type". Key Engineering Materials 522 (agosto de 2012): 520–23. http://dx.doi.org/10.4028/www.scientific.net/kem.522.520.

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This paper shows how the circular motion of Linear Electric Motor of the Moving Coil Type. The force on the coils can be calculated with COMSOL Multiphysics either using the method of virtual displacement or using the Lorentz force expression.

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Thilmany, Jean. "Multiphysics: All at Once". Mechanical Engineering 132, n.º 02 (1 de fevereiro de 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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