Performing mathematical operations on the data exported from COMSOL
Hello, I have completed a simulation on Microwave Imaging in COMSOL and have exported the Normalized Electric and Magnetic field. As further processing steps I need to perform Integration, gradient,...
View ArticleVery simple semiconductor simulation
Hi! I'm trying to learn Comsol, but it seems have run into a wall. I've looked thoroughly through the semiconductor_diode model as well as the MOSFET model (in the showroom). However, as I implement...
View ArticleCOMSOL Releases COMSOL Multiphysics version 4.3a
We at COMSOL are proud to introduce version 4.3a of COMSOL Multiphysics to the COMSOL community See: www.comsol.com/products/4.3a/ This introduces: * LiveLink™ for Excel® * LiveLink™ for Solid Edge® *...
View ArticleSimulation of the magnetic fied
Hi, I have one physical NdFeB magnet and I need to simulate this magnet in Comsol 4.2a, but I dont know exactly how to do it. I know these parameters of the magnet: Remanence Br = 1380 mT Coercivity...
View ArticleHow do I move the location of Legends in a Line Graph?
It is by default in the upper right corner, how do I move the location of the Legend? I am using COMSOL 4.3
View ArticleParallel computing MatLab Comsol
Hi, I am using Comsol 4.3 with Livelink for Matlab. I run an optimization code in Matlab where i call Comsol to perform frequency response simulations. Now i would like to start two parallel frequency...
View ArticleFinding ratio of two variables of two different domains
Hi every one I have two domains . I have to find the ratio of two variables. For example Variable 1 at domain 1 and variable 2 at domain 2. Now I need the ratio of Variable 1 and variable 2. Further I...
View Articleinterference between two waveguides
Hi, I am a COMSOL beginner. I want to see the interference between two waveguides. It is simple. There are two waveguides. And laser inputs are on the end of the waveguides. So I need two inputs. By...
View ArticleCOMSOL License Error -15, 570
Dear COMSOL team, We purchased a 64 bit COMSOL 4.3 verson of software along with a server license. After installing the software on a Linux (Debian 6 Squeeze) based system. We are encountring the...
View ArticleImplementation of an Initial temperature field using a previously obtained...
Dear all; I found that Comsol allows a simple equation for the initial temperature field such as T=sin(xy). But, I can not find how to implement some complicated temperature field as an initial...
View ArticleSeperating geometry
I have a very simple model a cube inside a cube, but I cannot apply different materials on them. I want to seperate two cubes so that I can apply two different materials to them.
View ArticlePoblem with simulation
Hello all I build a solar collector whith COMSOL 4.3 by using Heat transfert in fluid. The model run well but whe I want to increase the air gap between the glass and the pipe the temperature of the...
View Article1D plot of some points
Hi everybody, I have one problem in my model: I want to plot(1D POINT PLOT) the temperature of some points but if that point is not a node i don't know how to select it.. The geometry and the points i...
View ArticleProblems with boundary condition
Hi! We've tried to solve a problem. Here it is: It has a system of two concentric pipes. An opaque liquid enters to the inner pipe with entrance velocity and temperature known. The space between the...
View ArticleUpdate 1 for COMSOL Multiphysics 4.3a is now available!
Hello, We are pleased to announce the release of Update 1 for version 4.3a of COMSOL Multiphysics. For subscription license holders, access the product update at:...
View ArticleHow to redeuce memory requirement during comsol simulation
I am new to comsol. I recently built a simple 3D model in comsol. Oops - it used way much more memory than I expected. I used to build models with millions of nodes and never had any issues. But now...
View ArticleError: At least two vertices are needed!
Hi, I have just finished the Geometry part but when I want to go to the Material and define them, I see this error. In my model I used circles, difference, and polygons. I am not sure which part went...
View ArticleComsol 4.0
Yesterday I got a copy of the trial version of Comsol 4.0 at an on-campus workshop, with all the modules. My very first impression after spending all of maybe three hours with it: It's going to take...
View ArticleUnknown 'lm' variables with Diode Example using COMSOL 4.2
I am attempting to replicate the Semiconductor Diode 4.1 Model file found at this address:www.comsol.com/showroom/documentation/model/114/ by starting from a new COMSOL file and essentially applying...
View ArticleEvaluate total force acting on a body
Hi everybody! I made a simulation of a rigid 3d body moving inside a fluid at constant velocity. I used the Stationary Laminar Flow study. Everything works fine, but now how i can find the total force...
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