Issue importing ipt files from Inventor with the CAD module
Hi, I can't seem to import a simple IPT cad file (that has a helix built in) from inventor, the import module gives me an error back saying: Not a valid ENTITY type for this operation - Detail:...
View Articleerror: The object 'Type: Save Point Geometry Tag: geom1' is not contained in...
Hi all- I have been working on a model for some time, and just trying to optimize the solver settings. I saved the model today, and then opened it up again to work on it, and now get this error for any...
View ArticleFuel tank simulation
Hi, I have a project about fuel tank simulation. The thing that I try is similar to the sloshing tank example. However, since the fuel tanks are closed [ :) ] I need to limit the deforming mesh. Has...
View Articlespecifying varing coefficient - interpolation function
Hi all, I would like to specify varing htc via interpolation function and apply it to a heat flux boundary condition. I am attaching a sample file. - Model: 2D-axisymetric (i.e.cylinder, mm), heat...
View ArticleImporting a file from AutoCAD to COMSOL
I have created a 3D building model on AutoCAD and wish to import it to COMSOL for CFD analysis. Can I know the process for importing?
View Articlea question of memoy
Hi! I have one question about memory！ My computer have 90G Memory and 12 CPU，when compute the case，maxium 12G used，still have 78G memory is not occupied，my version is 4.3, win7 64bit；how can i fully...
View ArticleProblems with results of simulation in a range of frecuencies and a specific...
I am tried to simulate the microwaves propagation in a waveguide transition of rectangular to circular. The problem is the following: when I perform the simulation in a range of frecuency, the obtained...
View ArticleScattering boundary conditons for non-normal incident (using weak-contribution)
Hi all, I'm wondering, if it possible to use the scattering boundary conditions in the RF module to make a boundary transparent for a plane wave with a known wave-vector (which is different from the...
View ArticlePML does not work during wavelength sweep
I was simulating the scattering from a nanodisk by normal incidence. With a spherical PML, the scattering field should be basically symmetric below and above the disk plane. It is indeed so when I...
View ArticleSaving Error
I was runnig a COMSOL simulation with a Parametic Sweep (so it was a very large file). After it finished runnig, I clicked save, COMSOL closed and the following error popped up: OMP: ERROR #134: Cannot...
View Articlesimulation of electric and magnetic field
I have to simulate for effect of electric and magnetic field. Magnetic field is being produced by 2 permanent magnets (bar magnets) and electric field is being produced by current carrying conductor. I...
View Articleconverting a 3d dwg file to a COMSOL compatible file
Sir... I was trying to open 3D dwg file in Autodesk Inventor for exporting it to COMSOL. But, I am not able to get my whole drawing in the inventor part mode. Can I know what is the reason for that?...
View ArticleVelocity of solution
Hi, Since it depends what speed calculations? I created two identical geometry. One in 2D it is counted in minutes. Second in 3D it is counted for 30 minutes to 1 hour. It is possible to calculate the...
View ArticleUse 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 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...
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