How to get final dimensions i.e. outer profile in COMSOL?
Dear friends i want a help in this part. Here, i'm explaining the full problem. # i got the co ordinates of a biological part from image analysis in MATLAB . I plotted those points in the COMSOL (...
View ArticleUnable to create mesh : Error Free Tetrahedral 1
Hi everybody, I am having this error when I try to mesh a 3D structure : The following features have problems : Features : Free Tetrahedral 1 I don't find a way to have more information about this...
View ArticleEuler-Euler Model: reached singularity
I am running a Euler-Euler model and get a singularity error about six seconds into a 12 second analysis. It appears that there is a high velocity flair at an inlet when the singularity occurs. I have...
View ArticleStrain localization
Hi everybody, If I press a soft block of material with elastic modulus of 60 MPa with a hard sphere, when would I have the strain localization? Does buckling means strain localization or a sign of...
View ArticlePlacing a finite element model into an electrical circuit in COMSOL 4.1
Hello, I have recently made the switch from COMSOL 3.5a to COMSOL 4.1, and I am currently unable to do things that I used to be able to do very easily, namely placing my 3-D model (drawn and defined in...
View Articlehelp internal parser error
Hi, it appears an error that says "internal parser error" when I write " 0.01[Pa·s] " in Global Definitions->Parameters. It has something to do with the viscosity units. Could anyone help me? Thanks...
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 Articlerf mems switch
can anybody upload a .mph file of rf mems switch ? i am new to Comsol. and ii want to study a movement of mems switch on this s/w.
View Articleabsorbing boundary condition for heat transfer problem
Hi, can I give a absorbing boundary condition for a transient heat transfer problem. This is to avoid the heat wave reflecting at the boundary and contributing to the temperature rise. Can someone help?
View ArticlePML Scaling factor in COMSOL 4.3
Hi, I am doing a 3D simulation with COMSOL 4.3 to find the field distribution and the mode of a waveguide where all the cladding, the core and the substrate have different refractive index. I have...
View Articlemagnetic forces direction in post-processing
Hi all, I have made a 2D simulation for the stress distribution due to magnetic forces in a synchronous reluctant machine, I want to show how the forces act on the boundaries of the stator teeth and...
View ArticleCOMSOL Failing at Simple DE?
I've encountered a very simple problem with COMSOL's eigenvalue solver and I was wondering if anyone else has had the same problem. I'm trying to solve the simplest DE imaginable. I'm trying to find...
View ArticleSwept mesh and Grid independent results
Hi, I want to know whether it is possible to swept a mesh along a direction that takes 90 degree turns (A square pulse in 3D). Also I am facing a problem with the mesh independent results. I am...
View ArticleConfine Modes
HI, I am doing a structure eigen-mode analysis. How can I only see the longitudinal mode and filter out other modes? Thank you
View ArticleWhat does it mean to have imaginary part for the force (AC/DC module)?
Hi, I am running a simulation to calculate the force between two conductors carrying AC current. I used MF with simple two circles of copper and surrounding of air. I set current density 200 in z...
View Articlesurface to surface radiation without surface
Hello, I work on a molten charge and i have some issues with radiation. Usually i use a surface to ambient radiation condition but it is not enough precise for my problem, i have to take into account...
View ArticleApplying time derivative as a dirchlet boundary condition
Hi, I need to apply the time derivative of a displacement created in a piezomaterial as the velocity for a fluid boundary..... Could someone please let me know as to how this can be handled in...
View Articlebatch file
Hey. How to use batch files. And where is possible to find documentation on this topic. Thank you.
View ArticleHow to save a solution
Hello , I have a question about how to save a Comsol solution. I did a model in Comsol 4.2 , after 31hs I got a solution , I saved the model but when I opened it again the solution was not there , so I...
View ArticleHeat Transfer in a bitumen tanker
I am trying to model a steel tanker filled with molten bitumen. The tanker is insulated and the bitumen is heated by two propane burners ( in form of U) located at the bottom. For the bitumen I have...
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