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Questions tagged [comsol]

COMSOL Multiphysics is a finite element program used in engineering and physics. It incorporates combineable modules for different areas of physics (e.g. structural mechanics, thermodynamics, acoustics). It also has an API that is compatible with Java and supports LiveLink for MATLAB.

COMSOL Multiphysics is a commercial finite element program used in engineering and physics. It incorporates combineable modules for different areas of physics (e.g. structural mechanics, thermodynamics, acoustics). It also has an API that is compatible with Java and supports LiveLink for MATLAB and several more programs.

COMSOL offers 24h support for users with a registered software licence. They also offer to look at your model files and give concrete feedback.

Resources

COMSOL Homepage
COMSOL Support Center

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How can I add Interface boundary condition between two domains(geometry) in COMSOL?

Please see the attached image/problem[Interface coupled problem statement] below. It has two domains with two PDEs coupled at the interface. I have no problem solving two coupled PDEs for a single geometry, but for two different geometry, I am not…
Anadi
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How can I give time varying temperature dependent heat source term in COMSOL Multiphysics?

The conditions are as follows: 0
Prakash Singh
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Comsol: Infinite Element Domain module

I want to simulate a 2D heat transfer process in the subsurface on a region which is infinite on the r-direction. So, as you know, the very basic way to model this is to draw a geometry that is very long in the r direction. I have done this, and the…
Mohammad
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Error: NoClassDefFoundError When Using Eclipse To Run COMSOL Model

I am trying to use Eclipse to run a COMSOL model and I have read the guide from programming reference manual. However, Eclipse always report the error as follows, Exception in thread "main" java.lang.NoClassDefFoundError:…
Jonas Lionel
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COMSOL: Diffusion in Transport of Diluted Species Produces Unphysical Results

I am simulating Transport of Diluted Species inside a pipe segment in COMSOL Multiphysics. I have specified an initial concentration which produces a concentration distribution around a slice through the pipe at t=0. Moreover, I have a point probe a…
Timo Jakumeit
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Periodical structure and non-periodic element

Is it possible to make a geometry in Comsol that combines a periodically repeating structure and one non-periodic element? Like in this figure:
svetik0t
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Comsol Multiphysics Research Papers

I am currently attempting to model the absorption of Carbon Dioxide by different solutions. I found this paper that does this. They used Comsol Multiphysics but show almost no images of them modeling things in Comsol. They only show the differential…
Tariq S.
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COMSOL coil group which crosses the modeling plane more than once

I'm trying to model a system in the magnetic field, 2D-axisymmetric environment, with current loops which pass the modeling place both once and more than once. I've read here that the solution should be to mark the coils which pass through the plane…
hopper19
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Simscape, COMSOL compatibility in simulating electromagnetic range of inductive charging

I am currently trying to use Simscape to design and simulate the electrical circuit and COMSOL Multiphysics to simulate the electromagnetic interaction between coils. What I'm not certain of is whether or not we can successfully link the two…
thanh thai
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upper limit Of Dependent Variable comsol

Hello I'm trying to solve a 3D problem with several PDE's attached and I need to define an upper limit for my variables, I know that in comsol it is possible to define lower limits, but I can't find any way to define the upper limits. This is…
Leonardo Alves
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How to get comsol license file and trial passcode for downloading comsol multiphysics

Is there any way to find the comsol license and trial passcode free or paid. And Is there any to download comsol Multiphysics for mac os X
MannaICT13
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STEP to STL script stops after 478 itterations with runtime error 91?

I have encountered a very odd error. When I run my STEP to STL conversion VBA script, it runs flawlessly for 478 itterations and then stops with the following message: Run-time error '91': Object variable or With block variable not set the…
avgJoe
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Matlab Simscape vs Simulink vs PDE-Toolbox/Ansys/Comsol

I found a Matlab Simscape example simulating a dynamic linkage. Additionally there's also a Simulink blockdiagramm included and I know how Simulink works/solves the underlying mathematical model. But I don't know if Simscape is just an Animation of…
avermaet
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Comsol resistive heating coil simulation

I have a resistive coil from a MEMS. The only data I have to simulate the resistive heating is the input voltage which I can use between 0.5V to 20V and the material of the coil(GOLD). I am getting error like [Failed to find a solution. System…
Hiril Patel
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Eigenvalue as coefficient in time-dependent PDE in COMSOL

I'm solving an eigenvalue problem in COMSOL. And after this, I'd like to use the eigenvalue as a coefficient in different physics. Thus, does anybody know what name stands for eigenvalue in Coefficient Form PDE in an eigenvalue study COMSOL? I…
James Flash
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