3D 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 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 ArticlePartial cut plane
Hello, 1) I have a 3D geometry. It is a pipe and I would like to do 2D cut plane. In my case I want to do partially. It means that I do not want to cut for all diameter (between boundaries) of pipe but...
View ArticleVacuum properties
Hi, While doing eigenfrequency analysis on rf module of a cylinder, if the geometry consists of only a cylinder, the cylinder is assumed to be standing is vacuum. Can I change the surrounding medium to...
View Articleoutlet as inlet (interpolation function)
Good morning, I'm trying simulare a laminar flow and the transport of a diluted specie (c) in a 3D model. I would like create a loop in which the concentration at the outlet at the previous step became...
View Articleinverse initializing model
Hi my Dear Friends, I have a constant amount of liquid between a sphere and a flat plate in axisymmetric geometry. I want to insert some specific volume of liquid in comsol and find the height that it...
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 ArticleHelp for Modal analysis of a nonuniform beam using COMSOL
Hello,everyone. I want to do modal analysis of composite blade using COMSOL. The blade will be represented as a series of beam element. My question is how to use COMSOL to build nonuniform beam,...
View ArticleCan someone help me understand this error?
I need help understanding the cause of the following error: "Failed to compute elastoplastic strain variables" I have received this error numerous times in a few different structural models where I am...
View ArticleMass transfer in membrane
I have succesfully developed a 2d model for the simulation of diffusion+reaction through a membrane. Now I want to do the same thing with a 3d model. I developed a model but it doesn't work and I...
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 ArticleNVIDIA driver 305.93 causing erratic behavior
COMSOL was working great until I got a Tesla NVIDIA GPU. After installing the driver NVIDIA 305.93 I started getting erratic behavior when mouse clicking on the graphics. When I click to highlight a...
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 ArticleDifferent boundary conditions for dependent variables in PDE mode...
Hi all, I'm trying to solve a system of 4 PDEs on a rectangular box. My problem concerns the implementation of the boundary conditions. If I name my dependent variables, say u, v, w and p, then I want...
View Articleproblems with axial baffled stirred mixer mesh
good morning, I contact you because I have problems with the meshing of axial agitation tank which throws me the following error Problem setting up multigrid. Failed to build feature 'Boundary Layers...
View ArticleError in Sweep - Invalid Property Value
Hello community, I have a problem with a file that was running fine without parametric sweep. I tried to implement the parameter sweep, but it seems I run into troubles. Here is the error message :...
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 ArticleHow 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 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...
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