PDE and ODE implementation
Dear all, I am quite new in COMSOL world and I would like to ask some help for my problem. I am trying to implement the model described in the paper which I attached here, and I would know if someone...
View ArticleComsol v4.3.0.233 crashes
Hi, Today, after restarting my machine I opened several applications and I was logged out from my desktop session. After checking one by one, I get to see it was comsol that was giving problems. I've...
View Articlesphere in elastic medium
Hi All. I'm trying to impose some pressure on a spherical boundary (it is a very simple model) but I don't understand why Comsol is telling there is something wrong with it! I have added the elastic...
View ArticleLivelink for Matlab material definition issue
Hello, My problem is the following: I am defining a RF model: [...] model.physics().create('rfw1', 'ElectromagneticWaves', 'geom1'); model.study().create('study1'); s1 = model.study('study1');...
View Articlerestraining normal velocity vector in a curved surface
Hi all, I'm trying to emulate a two phase flow with the laminar single phase module, but I could not find a way to restrict the normal velocity from flowing through a curved surface. It's like a slip...
View ArticleAntenna far field postprocessing
Dear All, I am modelling VHF/UHF directive antennas in 3D and I am specifically interested in the far field patterns of the antennas. I notice that the far field postprocessing is extremely time...
View ArticleHi: need help on electro-rotation studies
Hi I work on electro-rotation studies through dielectrophoresis(DEP). Problem involves lot of variables, however I would like to know a way to obtain rotational simulation due to DEP? Currently we got...
View ArticleMoving mesh 2D
Hello, I am trying to simulate the moving boundary for a 2D geometry. I started with a simple 2D geometry where 1 boundary is moving in the x-direction and 1 boundary in y-direction, but because the...
View ArticleConstrain
Hello, I want to define a variable and ask COMSOL to stop running when this variable exceed from a special amount or when it doesn't change with time more. Thanks a lot in advance. Saeed
View ArticleDiffusion through Teslin Paper
I am having trouble creating a model. I am trying to create a model that can determine whether or not chemical solutions will diffuse through a porous Teslin paper test strip. I want the chemicals to...
View ArticleHow to define variable regard to time dependent steps?
Hello All I'm running a time dependent AC/DC model, The conductivity of material must be changed regards to voltage differences on two coordinate in each step . I wonder How can I define a variable or...
View ArticleSimualtion of Electrospraying using comsol
Hello How to find surface charge density during electrospraying?How to couple laminar two phase flow with electrostatics? Thanks Alok
View ArticleDeformation in a Tire
Hi everyone, I am currently trying to model a tire going over a ledge and examining the stresses and deformation caused by the impact of the ledge with the tire. I am applying applying 5000 N of force...
View Article1D plot
Hi I simulate the waveguide with mode analyses(2D) in x and y direction, now i want to plot 1D plot in z direction according to x and y how can i do that?
View ArticleGetting capacitance from Impedance/admittance
Good day! I am modeling an impedance/capacitance sensor. I have a static model and the results are very promising, now Im trying to expand my model and model a frequency domain study: the voltage...
View ArticleStep function
Very simple question, but I can't find out how to do it. I have a external temperature, "Temperature 1", which is 100 C. After 330 seconds I would like it to drop 80 degrees to 20 degrees. I should be...
View ArticleState Space Export
Hi , i have build a simple cantilever beam model using time depented model. after defining the points of forces and parameters, i want to export the model to matlb (State Space Matrices) so i could...
View Articlephotonic crystal fiber
Hi , I am an electronic engineer doing master degree research about raman amplificaion by using photonic crystal fiber, I want to calculate the confinement lose by using PML around my fiber strucrutre,...
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