Attributes for each region, integration over region
Greetings, I am new to Comsol and tried to see if a similar discussion has been carried out before without luck. I have a magnetostatic model with several regions (windings). I need to connect...
View ArticlePrincipal stress 2d vs 3d
Hi everyone, I have the same model made in 2d and 3d. First and second pricipal stresses are similiar in both models. But third principal stress in 2d are unrealistically high, however in 3d have value...
View Articlevibrating rod
Hi, I have a coil and inside a rod. The rod vibrate with a given frequency. Knows somebody how could this in Comsol ? In help are some materials about vibrating membrane but I don't know exactly to...
View ArticleRelative Tolerance
Hi I have done some simulations and the intial values used are the default ones. I was wondering when does initial values are important? Is it important to set the relative tolerance for a problem...
View ArticleJoule heating
Hello, I am trying to study the joule heating by applying a current density to a material (simple block). I know how to do this by applying a ground and potential boundaries to the block (making a...
View Articlemechanical vibrations
Hi, What kind of Module are used in Comsol to study mechanical vibrations ? Thanks, CR
View ArticleUsing data from comsol in matlab simulink
Hi, I am trying to use elecromagnetic fields calculated in comsol in my simulink program, I have been using comsol 3.5 before, and just used fem export and S-function in matlab to to this. But I have...
View Articleabout error in value getting
Dear all , I am doing simulation on inductive coupling , taking two coils , one with six turns , another with single turn , I am exiciting my coil by voltage at 320 V , and i am observing the flux and...
View ArticleExtracting absorbed power
Hi all! I am currently doing a 2D model where I have an incoming power, and then I have absorption within the material. As a result, I have the value of the intensity everywhere, but I don't know how...
View Articletemperature control in heat transfer
Hello, I am modelling a heat transfer problem, and the details are: when the temperature increases to 315K, heating is stopped; however, when temperature drops belows 310K, heating restarted. If the...
View Articlehow to over come error ''Single Matrix''
Hi All gentlemen, during my solving an error notic is coming and terminating my computation. the message is show bellow Feature: stationary1(sol1/s1) Error: Single Matrix. Could anyone may give some...
View ArticleAdding a second y-axis to a plot
Perhaps I've over looked something, but I can't figure out how add a second y-axis to a plot. I'm specifically interested in adding a right hand axis. I've got a plot of two variables and would like to...
View ArticleHow to justify the internal heat generation in comsol???
hi every one, i am using comsol 4.1. i want to give a internal heat generation on rectangle..how can justify internal heat generation in comsol any one help me?? thanking you, parma
View ArticleUrgent research problem: How to solve PDE systems( 2 PDEs 2 unknown u1,u2...
1.Each PDE is composed of u1,u2. How to set up the coupling process? 2. The spatial dependence for this problem can be reduced to 1D. du/dx But it is a 2D rectangle. The laplcian operator will also...
View Articlehow to understand the code of comsol in matlab editor.
how can i understand the code of programme that is developed with the help of COMSOL and saved as m file and now it is obtained in COMSOL MATLAB editor. how to get to know the curve it shows belongs to...
View ArticleNo eigenpair solution selected
I am getting this error message - "No eigenpair solution selected " when I hit compute. Can someone please help me solve it. Thanks, Rohan
View ArticleSwitched reluctance motor - rotor and stator deformation - How?
Hi. I am building a 2D model in which I would like to showcase how the stator and especially the rotor of a switched reluctance motor deforms because of the radial and tangential magnetic force on the...
View ArticleMotion due to a magnetic field
Hello everyone, I am pretty new to COMSOL so this might be a simple question to answer. I want to 2D simulate the attraction between a magnet and an iron bead which are located in air (see attachment...
View ArticleBoundary condition T parameter
Firstly: I have created a 'Heat Flux' boundary condition that varies due to an external temperature. My model is a 1D model of heat transfer in solids. In the field labelled 'External temperature' I...
View ArticleModeling aluminum plate heating
Hi. I am lost and need some help. I need to modeling the following case: The heating suffer by an aluminum plate that it is illuminated by a lamp formed by a matrix of 7x7 leds with a total power of 49...
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