DC magnetic state of ferrite
Hi!! could anyone please guide me about how to find the DC magnetic state of ferrite in Comsol's RF module.sorry for a vague question but i am pretty new to COMSOL as well as electromagnetics domain so...
View ArticleIs it possible to create a "memory" of a varible?
Hi, I want to be able to define a stress point in space that comsol should remember until a certain condition and then it should change to a new stress point memory. It is a time dependent problem....
View ArticleCALCULATE HEAT PRODUCED AFTER HAVING RESULTS
Hello, I have a plate that vibrates and I have friction in one point.In my results I can see the stress in this point,the strain,displacement,frictional force,sliding velocity .I want to calculate the...
View ArticleThermoelectric Effect
Hello, I'm working on Thermoelectric Generator and I would like to have a basic model with the equations used in COMSOL, Could anyone who worked in this field, please help. With Regards . Pheba
View Articleconvert imported *.stl into solid
I am importing a rather complex geometry into COMSOL from Solid Works. After some tinkering with the import controls, I managed to import the object but I do not think COMSOL recognizes it as a solid....
View Articlemagnetization problem
Can any one let me know what is problem , i am not getting magnetization in the coil , i excited primary coil with the 319 v and want to see magnetization in the coil , i am not able to get the...
View ArticleHow to define a metal in the Eigenfrequency analysis?
Hi, I want to define a metal material (i.e. Ag or Au) in the RF Eigenfrequency analysis. I may defiene by typing in the Drude model, but how can I connect the omega in my equations to the readable...
View ArticleB of H / H of B curves
Hi everyone; I searched and it seems nobody asked it before. In the AC/DC module, in either MF/MEF, there is an option to use a constitutive relation of HB-curve, which gives us |H|=f(|B|). Is there a...
View ArticleNot convergent when the mesh is dense, why?
Dear all, Convergence problem is kinda mysterious... This time convergence is nor reached when the mesh is dense. I would say perhaps too dense in some region. Some coarser mesh leads to convergence....
View ArticleCurvature from surface
Hello everyone! I need to evaluate the curvature of a surface. My problem is the following: 1. I have a semisphere (x,y,z where z is the elevation and (0,0,0) is located on the inner center of the...
View ArticleCAD import Module has stopped working
tried to import solidworks file ( no solidworks in my computer) then the import module crashed following info is presented COMSOL CAD IMPORT MODULE HAS STOPPED WORKING Problem signature: Problem Event...
View ArticleGeometry problem "unknown geometry -Tag:null"
Hello! I have done a Chemical Reaction engineering simulation and have synchronized it with a geometry. The fist model I did was too large, so I wanted to create a new one. I have done this by buildung...
View ArticleModelUtil.connect(solverHost, solverPort);
Hi everyone, I try to compair the results of two solvers running in parallel on two different comsol-servers. Therefor I try to establish a link from my Java-API to two comsol server. But only one...
View ArticleHelp...Which Iterative solver settings for 3D RF module with periodic...
Hi All, Can somebody help me with my solver settings confusion. I'm trying to setup a 3D RF module simulation with around 250.000 elements only with periodic boundary condition. I read that I should...
View ArticleWhy does my parametric sweep slow down?
When doing nested parametric sweeps, they start off fast but slow down to a crawl eventually. What am I doing wrong here? Is there a faster way of doing this? Seems it has little to do with my computer...
View Article"Use space coordinates as arguments" check bock - Interpolation Functions
Dear support-team, recently I updated my Comsol from 4.2a to 4.3a. In my models I use the interpolation functions. In the 4.2a version there was a check box "Use space coordinates as arguments" which...
View ArticleVoltage source in AC
Hi. i'm studing an inductor to analyze inductance and resistence od the model. I use electrical circuit and i work with AC frequency of about 20kHz and i have some questions: 1)Vsrc in voltage source...
View ArticleHeat source
Hi all, I have a model composed of three layers, three different materials. How could I insert a triangular power profile(as heat source) in the second domain. Example of power profile ( t=0s P=0w;...
View ArticleLumped port
Hi, Do i have to use some particular dimension when i use a lumped port? I mean do i have to use a particular hport an wport ratio? Thanks Nicola
View ArticleDependence of Electric field on mesh size in RF modeling
We would like to model our laser in an RF module, solving for electrical field strength, to see the optical field distribution as a function of layer thicknesses, however we kept seeing unexplainable...
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