Use of LiveLink for uploading 3d dwg file into COMSOL 4.3a
Can anybody help me about how to upload 3d dwg file in COMSOL 4.3a, please??
View ArticleAbsolute pressure sensor
I'm working on simulation of absolute pressure sensor. I want to know that when i compute the result for stress it shows the total stress. I want the longitudinal and transverse both stress at...
View Articleelectrostatic force cause displacement in parallel plate capacitor in COMSOL
Hi, I have been designed a parallel-plate capacitor in COMSOL. Where one plate is connect to voltage of 10V and other one is connected to GND. and a air box is around the parallel plate capacitor. As I...
View ArticleUndefined value found in the stiffness matrix, requested mesh quality cannot...
Dear All, I am simulating a sphere flowing in a microchannel with solid traps (2D for simplification). Automatic re-meshing is activated. Two scenarios are considered: Scenario 1, the sphere will...
View ArticleDifference between two modules in comsol
What is the difference between module " Structural mechanics--->Poroelasticity(poro)" and module "Fluid flow---->Porous Media and Surface Flow"? Anybody knows? I was gonna implement solid liquid...
View ArticleSome questions about one example in model library
I am redoing the example of "Terzaghi Compaction", and I have some questions or confusions: 1) In the "Darcy's law----> storage model" section after part "Definition", we just need to set K as K_s,...
View ArticleWhat physic need for SQUEEZED-FILM DAMPING MODELS FOR MEMS in COMSOL
Hi all, I am working on SQUEEZED-FILM DAMPING MODELS FOR MEMS in COMSOL. Where one of the plate(1) is fixed and other plate(2) is movable when applying pressure. Whole structure should be inside the...
View Articlequestion on Poroelasticity module
I am doing example of Biot poroelasticity with poroelasticity module, in the "Poroelasticity---------->poroelasticity material 1", why fluid properties should come from "fluid", but the porous...
View ArticlePhase calculation related error due to incorrect boundary conditions?
I am trying to simulate a metal insulator metal fishnet structure which in infinite in the yz plane and the TE polarized wave propagates in the z direction. I have applied PEC on the planes (xy planes)...
View Articlejava exception error in using postcrossplot code.....
Hi I am working in windows xp os and with Comsol 3.5a with matlab R2008b I am exporting model file form comsol to matlab as fem and is saved in fem file in workspace. when iam using postcrossplot in...
View ArticleCFD - Surface roughness
Hey guys I really need your help on this one! I was wondering if any of you could tell me about the default settings of surface roughness's in COMSOL? All I've found about it in the documentation is...
View ArticleModeling a balloon to plug an opening
I would like to model a balloon used to plug the opening of an oddly shaped container. Ideally, the balloon would start uninflated, expand due to pressure and fill in the hole it is plugging. My...
View ArticleHelp with moving in Comsol.
Hello Mr. Ivar. I am writing to you because you helped me to solve most of my problems. Therefore, I would like to learn if you have any experience with choice Physic Manager Builder. And one more...
View ArticleLicensed number of users already reached.
Dear sir, I am from IIT Madras and I am using an institute license. While opening the heat transfer module in COMSOL, it is saying "Licensed number of users already reached.". Can I know what the...
View ArticleFrequency domain with two input variables
Dear all If I add a external force on one end of a silicon beam while let the other end fixed, is it possible to put a constant voltage across this beam in frequency domain simulation? It seems...
View Articlegive specific values for every mesh point of a boundary as boundary condition
hey everybody, is it possibly to give different values for all points of the mesh on the boundary, respectively? for example, just a vector containing as many values as i have boundary mesh points, or...
View Articlesloshing tank problem with FSI
Hi all, I have seen the sloshing tank problem. I want to do same problem with fluid structure interaction that means interaction between fluid and container. fluid exerts a pressure on the wall on the...
View Articleinitial value set-up
Hi, I have a 2D simulation running from T=0 to T=100. First, I run the simulation from T=0 to T= 50. Then I want to use the solution at T=50 plus some value changes in specific domain as the initial...
View Articleself-intersection
Dear all, I'm trying to mesh a more or less complex structure and right now, I always receive the error message that self-intersection is not supported. Can anyone explain this error message nearer to...
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