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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

52 questions
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You have loaded library /tmp/... which might have disabled stack guard

During the installation from an .iso I have this error Java HotSpot(TM) 64-Bit Server VM warning: You have loaded library /tmp/setup.4871/lib/glnxa64/gcc/libgcc_s.so which might have disabled stack guard. The VM will try to fix the stack guard…
Alpha
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How to import java.security.AccessController in COMSOL?

When I try to run my COMSOL script from my App GUI, I receive an 'AccessControlException' when trying to load an .STL file from my local hard drive. AccessControlException: Security preference 'File system access' does not allow 'read' access to…
avgJoe
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Abbreviating long object chain (java)

First of all I would like to share that I've started working with java and object oriented programming very recently so forgive me if this is a stupid question but I cannot find a clear answer elsewhere. I'm working on a template for a Comsol model…
F Rooyackers
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UnsatisfiedLinkError in Eclipse when running the COMSOL Java API

I created a Java project to automate simulations in COMSOL Multiphysics. However, whenever I try to run the code, I'm hit with the following error. java.lang.UnsatisfiedLinkError:…
Marco Wolf
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COMSOL Schrödinger Equation

I want to solve the Schrödinger equation in COMSOL with some specified boundary conditions. As an ODE the schrödinger equations reads (in 1D): af''(x) + b(x)f(x) = Ef(x), where E is an unknown constant that will be determined by the boundary…
user13514
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How will Comsol use the expression "0 10^range(2, 0.1, 7.5)"?

I am facing an issue with the range function. How will the following expression be used?
SUGANTH
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Problem running COMSOL in a cluster with SLURM

I am trying to upload this job via a .sh script to a cluster with SLURM, using the COMSOL software: #!/bin/bash #SBATCH --job-name=my_work #SBATCH --nodes=1 #SBATCH --ntasks-per-node=20 #SBATCH --mem=20G #SBATCH…
Raamses Díaz
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Reflecting 4d symmetric data

I've found out that there is no example of how to reflect symmetric 4d data, which can be very useful when 3d simulations wants to be performed using a symmetric plane to reduce calculations(e.g. ANSYS, COMSOL, etc). This example shows a data file…
Desperate Morty
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Defining temporal resolution in Comsol post-processing

I have a time dependent heat conduction simulation and need to plot the average temperature of some area over time. However, the exported table data apparently uses only a few data points and interpolates in between. More specifically, I have some…
PatrickKF
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Warning when adding Brownian force in COMSOL Multiphysics

I want to add a Brownian Force to my COMSOL simulation. Unfortunately, I get the warning shown below and I do not understand how to get rid of it. I am unsure what "second-order wall extrapolation" means. Moreover, I cannot find the "Wall accuracy…
Timo Jakumeit
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How to remove excess volume when building a COMSOL geometry

I'm having problems removing the blue colored volumes from my COMSOL geometry. I want to remove them in a way that the resulting pipe system doesn't have any holes in it. Another way to put it: I want to cut off the "excess pipe". I have tried all…
Timo Jakumeit
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Differential evolution in parallel in Python

I am looking for a differential evolution algorithm (hopefully the one from Scipy) I could use in an unorthodox way. I would like that for each generation, the DE gives me all the child members of the new generation in advance and that I evaluate…
Gael
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How to use version control with COMSOL Application builder?

I have built multiple apps using the COMSOL Application Builder, but have so far not had a good way of keeping track of my code changes. Is it possible to use GIT or another version control system with the COMSOL Application Builder, and if so,…
avgJoe
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How to stop EXCEL asking: "Are you sure you want to install this customization?"

Whenever I open EXCEL, Microsoft Office Customization Installer asks me to if I want to install a specific customization (COMSOL). How can I stop this? Screenshot Thanks!
Kutadgubilig
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Comsol 2 parameters

I have faced with following problem. I'm solving Boltzmann equation in Comsol using Reduced Field study, thus I vary a field in my program. Moreover I need to vary electron density at the same time. After calculations, I have a results. Derived…
Sergei
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