Stack Overflow
Stack Overflow

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
1
vote
1 answer

Simulation of effect of heated resistance on temperature distribution in laminar flow

I'm new to Comsol and I'm trying to simulate the effect of a metal heater resistance (gold) on a laminar cooling flow (water). I would like to get the stationary temperature distribution in the fluid due to the heating effect of the gold resistance.…
thylakoid12
  • 137
  • 1
  • 9
1
vote
2 answers

How I could make a temperature sweep in comsol?

I make a structure using Comsol then I want to make this structure subjected to a temperature variation ( T(begain)=25C then a temperature ramp (100 C/min) till T=250C and it lasts for 30 min then another temperature ramp (-100 C/min) till T=25C…
user355474
  • 11
  • 2
1
vote
1 answer

using stationary solution as the initial conditions in time dependent model

Is there a way to use the stationary solution obtained in Comsol 4.2 as the initial conditions in a time dependent model? I want to conduct a simulation to find a solution (u) and its first derivative (ux) using a 3D stationary model. Save this…
James Nimmo
  • 33
  • 1
  • 9
1
vote
0 answers

Comsol-Adding "eps" to avoid division by zero

I am confused by not being able to solve this equation in Comsol This is equation I mention: 1-2*sqrt(Lf/pi)*integrate((1)/sqrt(Lf^2-x^2)*(1+0.3*(1-x/Lf)/(1+Lf/0.1)),x,0,Lf) If I write it in ODE and run, Comsol will notice message error (division…
P.Nguyen
  • 11
  • 4
1
vote
1 answer

Why did I get a different result-plot between the two solutions?

> Hi, I'm using a sample problem to learn the comsol. I would like to let my case problem (left) 3D plot, be the same as the tutorial plot (right). My problem is that, instead of the right figure plot (that shows the resin-red color traveling from…
panos deemac
  • 101
  • 1
  • 12
0
votes
0 answers

Exception with " Could not initialize class org.openxmlformats.schemas.drawingml.x2006.main.ThemeDocument" in COMSOL

I use COMSOL to read and write excel as shown below: CsBinaryReader inputStream = openBinaryFileStreamReader(excelFilePath); workbook = new XSSFWorkbook(inputStream); org.apache.poi.ss.usermodel.Sheet firstSheet = workbook.getSheetAt(0); It…
Jake
  • 11
  • 3
0
votes
1 answer

Unsupported operation on virtual geometry while extruding 2D geometry to 3D geometry in COMSOL 5.2a

I have created a 2D waveguide system, and now I've realized that I need to modify the height of the waveguide as well. To achieve this, I attempted to extrude the existing 2D system into a 3D shape. However, I encountered an error message stating…
HPC
  • 1
0
votes
0 answers

how to show such an under-tension geometry using the initial radiuses of the leg and the fabric in COMSOL?

I am trying to model a leg wearing a sock. I want to simulate it as a cylinder (the leg) surrounded by another cylinder (the fabric) in contact with it. Before wearing the sock, its redius is smaller than the leg and after wearing, it increases…
Maede Nsi
  • 1
  • 1
0
votes
0 answers

fluid dynamics and comsol alternatives

I'm trying to do simulation in fluid-dynamics, particularly for free convection. I used to know comsol-multiphysics, but now I no longer have access. Are there comparable packages, if possible octave-compatible? Of course I also used the Google…
Cisfinite
  • 101
0
votes
0 answers

How to Solve Coupled Equaitons Using Weak Form of Comsol?

I want to solve a set of coupled equations using weak form of Comsol. Some tuitials are available for solve simple uncoupled equations using weak form in comsol, which doesn't seem to work for my case. The equations may look like this (just a…
HC6
  • 21
  • 1
0
votes
0 answers

MATLAB error handling of SIMULINK (sim) due to external component

My problem is that I am running a sweep study with some parameters. I change them in MATLAB and then run a simulation in MATLAB with the sim command. The simulation in SIMULINK contains an external software component from COMSOL with an FEM behind…
jommil
  • 21
  • 7
0
votes
0 answers

Solution of pure transport first order hyperbolic PDE with delay, using COMSOL Multiphysics

I am working on a project to solve a first order hyperbolic pure transport PDE with time delay using COMSOL multiphysics. Is it possible to do this using COMSOL? if yes, what physics to include? and how to include time delay in the process? the…
Haneen Araydah
  • 1
  • 1
0
votes
1 answer

How to export a Numpy array to Comsol?

I have a Python script that creates a numpy array. How should I save this Numpy array to disk so that it can be read by Comsol?
Ghislain Viguier
  • 342
  • 4
  • 12
0
votes
0 answers

matlab livelink in non-interactive mode on cluster

I am trying to run a comsol matlab livelink script on a cluster. I am trying to do this in non-interactive mode. In interactive mode, I just do "comsol mphserver matlab matlabscript -nodesktop -mlnosplash" and it works. I can't get it to work in…
Nick
  • 81
  • 1
  • 6
0
votes
1 answer

Mesh data in FEM format in Ansys Workbench

I am using Ansys workbench2020R2.I want to get mesh data of a deformed geometry in FEM format. Is there any way to get the mesh data in FEM format in Ansys workbench? Deformed geometry was created by applying time varying load.
Anonymous
  • 1
1
2
3 4