Using 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 ArticleEquilibrium condition for an identity pair
Hi. I am new in COMSOL and I am checking for the software abilities. Currently I am using the identity pair in a mass transfer model. The idea is a fluid flowing on the surface of a slab, which is...
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...
View ArticleGlobal parameters vs. Model/Definitions/Variables
It seems that the geometry can only be defined by global parameters while the rest of the modeling can also use variables. Is there a way to access the model variables in the geometry such as...
View ArticleCalculated initial values NOT the same as specified
I have seen this now in 2 simulations... The initial values specified in Initial Value Domain nodes are NOT the Initial Values the solver ouputs, either at t=0 of the solution nor when asking the "Get...
View Articleyield stress
Hi I'm trying to understand how can i define yield sterss for a bingham plastic material in COMSOL. The stress expression for this model is: shear stress = yield stress+m*(shear rate) Any comments on...
View ArticleCreating Geometric Entity from Iso Surface
Is there a way to create a geometric 3D entity from a region in the results that has a solved field value that is less than or equal to some constant? In this way I could conveniently do averages over...
View ArticleModeling an acoustic t-junction
Hello, I am currently trying to model an acoustic t-junction with the frequency domain acoustic pressure module. But while the 3D simulation gives me reasonable results I only get nonsense from the 2D...
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