integral
hi do you know if it possible to calculate this integral in comsol (attach file) ? thanks
View ArticleCoupled heat-transfer electomagnetic waves modeling on the nanoscale-...
Hi all, I'm hoping someone with experience in the heat transfer module can help me here. I'm modeling arrays of nano-structures on a substrate excited with normally-incident, linearly polarised light...
View Article2D TRANSIENT Heat Transfer Problem
Hi everyone, I am encountering an error in the time dependent situation - Failed to find consistent initial values, last time steps not converged. I have specified 'initial values' and the required...
View Articledefine many material
hi everybody. do you know how define many material in a script in using matlab with comsol ? thanks
View ArticleElectrical circuit around a beam.
I have a aluminium beam with a piezoelectric patch at its center. The beam is loaded by a harmonic force. I have modeled this and the loaded beam shows expected results both in terms of displacement...
View ArticleUsing a Gaussian Pulse
Hi everyone, I'm actuallay working on a modeling of a laser pulse which is heating a front of a material in order to determinate the diffusivity, my current issue is that i would like to model my heat...
View ArticleNusselt number calculation in comsol 4.2
Dear All, I simulated a simple laminar flow of a liquid metal inside a 1 inch tube of 0.5m length with a constant heat flux acting at its wall in comsol 4.2. I used both the mesh options i.e. the...
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 ArticlePDE 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...
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