How to use parametric sweep by loading parameter values?
Hi, I have several parameters to add in study settings, as below: parameter: a1 a2 a3 a4 a5 first set: 1 3 4 5 7 second set: 2 1 3 6 4 ...etc. There are many sets, so I don't want to key in step by...
View Article3D induction heating meodelling
Hello, I'm a beginner on Comsol and I'm trying to produce a 3d induction heating model. I did a 2d previously and I was able to run it without problems. But on the 3d I have the following error message...
View ArticleHow to run!
Dear users, I just installed the Comsol 4.3 trial version on my mac (OSX) , but I am not able to run it. I don't have any application form file to run the software ! what could be the problem. any...
View ArticleAdding artificial diffusion/stabilization to PDE
Hi folks, can anyone point me to an example or model in the library where stabilization is added to a PDE. I've seen in the forum someone saying "transport problem" example, but it was in V3.5a, and I...
View Articlecreating a new material
Hi All, I want to make a portion of my model out of a particular material which isn't included in the built in library. How can I create a new material and add it to the library? Many thanks, B
View ArticleHow to fix the error "Out of memory in stationary solver."
hi ! I'm Lam, I construct a model.when i play function 'compute' in STUDY and see error "Out of memory in stationary solver." please show me how to fix it. thank you for comment.
View Articleheat sink on top of thermally resistive layer
does anybody now if it is possible to make a system like in the attached file, i.e. some structure with a heat source and a boundary with a heat sink, which is supposed to be a resistive layer at the...
View ArticleBasic electrostatic: FEM vs my interpretation
Hi everybody, I am confused by a very simple electrostatic problem illustrated in the attached drawing. My model (2D) consists in a first circle (1) defining the limits of the computation domain. A...
View ArticleModelling different time scale processes
Hello, I m trying to simulate an EKR process, I have flow of ions and need to model the water equilibrium for minimaly realistic results. I want to model water equilibrium as fast (instantaneus)...
View ArticleIs there any way to debug in COMSOL? I mean, to solve step by step
Hello, I think this is interesting. It would be very useful for me if there would be a way to run a model step by step. I am working in Time Dependent, with PDE equations, and I cannot find the mistake...
View ArticleGenerating mechanical waves in a tissue phantom having different shear moduli
I have been trying to simulate mechanical waves in a phantom tissue, having some different tissue properties such as shear modulus, using COMSOL. When I used poroelasticity waves under Acoustic Module,...
View ArticleField behind metal shield
Dear Users I want to model the following simple case. Within vacuum, a 2D body carries a surface charge. Next to it is a metal body. I want to obtain the quality of the field direction behind the...
View ArticleExternal functions : passing (variables and) unknown functions
Dear all, I'm actually using Livelink for MATLAB in order to solve a 2D time-dependant PDE in coefficient form, which is supposed to return a function u(t,x,y) One of the coefficients might depend on...
View Articleswitching between results
A very easy and quick question is there an easier way of switching through all the results of say a frequency sweep. http://i.imgur.com/U1yVh.gif this is what I do now and its soooooo tedious... ps it...
View ArticleHow do you know which resonant frequency of the cantilever is the proper one?
Hi, everyone. I'm quite confused. It's a rectangular beam,with one end fixed. Then I do the eigenfrequency study. When I apply different mesh method to the beam, for example, first I use Free...
View ArticleEigenvalue Calculations In RF Module With Perfectly Matched Layers: Radiation...
Hi everyone, I have one part general info that maybe others will find helpful, and one part question. Here goes: I've been trying to compute the eigenvalues of dielectric GaAs disk structures (embedded...
View ArticleSinusoidal Stress Time Dependent Study
I have been attempting to model a simple 5mm cube fixed on one side and with a sinusoidal time dependent stress on the opposite side. This should produce a propagating shear wave. I want to do this in...
View Articlewrong number of function arguments
Hello, I keep getting the same error for my analytical function "Wrong number of function arguments Number of arguments expected: 3" But as far as I can tell, I have defined 3 arguments in my...
View ArticleDirect influcence over automatic time-stepping?
Hi everyone, I'm wondering if it is possible to have a model influence the time-stepping algorithm directly? I know that certain things will cause time-stepping issues and I would like to 'inform' the...
View ArticleDimension of a exported data array
I have two model, and I need to graph with matlab the difference. I plot with 1D graph a first model, and export the graph; then i plot with 1D graph the second model, and export the graph. My problem...
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