Hi Ivar pleasse help
Good day. I apologize for the intrusion. Would you be so kind and answer this question: As in COMSOL 4.4 can view field line electric and magnetic field? Thank you very much. Goodbye.
View Articlehow to run a java .class file with command line arguments from the console
Hello, How can I pass (command line) arguments to a .class file when starting it from the console? The public static void main(String[]) method of my class parses its arguments to set parameters of the...
View ArticleMagnetic Field Input/Response
Hi, I would like to run a simulation where I give Comsol a pulsed gradient magnetic field and a conductive material, and then have Comsol return the induced magnetic field from the eddy currents in the...
View ArticleA question about exporting data
Hi, I meet a problem when I want to export the postprocessing data from COMSOL V4.1. In V3.5a, I can define the number of x, y, z points in the 'export postprocesing data' panel as the first figure...
View Article2D axisymmetric numeric port settings
Dear all, I am trying to model EM wave propagation through a tapered step-index fiber. Because of the large size of my geometry and the symmetry of the problem I use the 2D axisymmetric settings. My...
View ArticleFluid structure interaction
Hi all! I have some problems simulating a "Fluid structure interaction". I start from this model www.comsol.com/showroom/documentation/model/361/ . I have tosimulate the mitral valve of te heart so l...
View ArticleWhat is the out-of-plane thickness for?
I have a very simple system as depicted in the picture, I wish to simulate Joule heating of a Pt heater sitting on a SiN membrane. The thickness of the Pt heater will be 20 nm and the SiN membrane will...
View Articleidentity pair,assembly and port
My name is Guanjun Wang, a Chinese undergraduate student, recently, I had encountered a problem about the identity pair. Using the assembly between two unions and creating a identity pair which...
View ArticleMeshing problem
Hi everyone! I am using Comsol 3.5a and cannot figure it out, how to mesh this attached model ... I tried everthing from free mesh predefined mesh sizes (all of them) to boundary layer mesh but I'm...
View Articledielectric heat up in capacitor
I am modeling the dielectric heat up in parallel plate capacitor using microwave heating. I have watched all the relevant videos available and tried a lot of possible ways to change my model, but it...
View Articleplasma module: rate coefficient
Hi plasma model DC Discharge have 5 example three of them :1- argon- dbd-1d 2-dpd-flow -control 3-plasma- display- panel in these example there is a value in Modeling Instructions (Locate the Kinetics...
View ArticleRF module : refractive index
Hello dear. I'm a student of physics. The topic of my thesis is about Optical Filters. I use the COMSOL Multiphysics v. 4.3 for simulation. So I work with RF module. I have designed an array of Optical...
View ArticleExtracting time-dependent data from 2D axisymmetric plot
Hi all, I created a 2D axisymmetric conjugate heat transfer model in 4.3a, and it's time dependent. It's a sphere being heated by moving fluid around its geometry. The output has the temperature...
View Articlehoe do draw a soild cylinder in terms of slices -comsol4.3 version
Hai, I like to know how do draw a solid cylinder in to no of slices in linear direction.please let me know this ,hereby I attached the image of cylinder which one need exactly. regards, N.Kumar
View ArticleUDF file
Hi I am the new user of COMSOL simulation. I want to simulate fluid flow with velocity is function of time as below: V = 0.1m/sec for 0<= t <=5 msec V = 0 m/sec for 6 <= t <=200msec Can...
View Articleicons in the right click menu under linux
Hi, I just installed Comsol on ubuntu 13.04, and the icons don't show up when you right click on a node in the Model tab. I found a command in the instalation guide, but it doesn't...
View ArticlePlane Wave Radiation in Transient Analysis
Hello Dear Friends, I want to simulate a simple model via transient analysis. My model is similar to "porous_absorber.mph" (4.3b). My model is more simple. Fundamental difference between two models is...
View ArticleConvergence problem with Comsol 4.3b
Hi Everyone When I run the model in the 4.3a, it can work very well. The convergence firstly is about 1e4 to 1e5. When the comsol software is updated from 4.3a to 4.3b, the convergence becomes 8e8 and...
View ArticleCavity Resonator
Hi all, I try to simulate a simple case of rectangular cavity resonator. I've found the resonance frequency analyticaly and by using eigenfrequency method that is published in COMSOL model gallery...
View ArticleIntegral Boundary Condition - Problem
For the sake of simplicity, I'll use an example of stationary heat transfer in a 2D geometry. My goal was to create a boundary condition such that the total flow of a boundary in the z-direction had a...
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