constraining the range of dependent variables
Hello, I have implemented an axisymmetric drift-diffusion equation using the equation-based modeling interface in COMSOL 4.3 (incorporating the necessary terms due to the curvilinear coordinates). I...
View ArticlePerforming 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 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 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 ArticleMeshing
Hello, I"m looking for good tutorials for showing the method of "user controlled mesh". I cannot find any good tutorial in COMSOL. Please let me know. Thanks.
View ArticleBoundary condition coordinate system in 3D CFD model
Hi Folks, I would like to change the coordinate system for the velocity of a sliding wall boundary condition in a 3D CFD model (in COMSOL 4.3). Thanks, Tim
View ArticleMagnetic field
Does anybody know how to write this expression on comsol ( ∇/B/^2 )? I meant expression that replace "the gradient of the magnetic field norm square". Thank you
View ArticleHow to turn bézier curves into surface
Hi, is it possible to turn a bézier curve into a surface which can be extruded? Thank you for your help. Sandra
View ArticleStructure with 2D and a 1D truss...
Hello all, I am trying to implement this (see attachment). I guess it should be relatively easy, and for sure lots of people know how to do it :). After "spending" quite a lot of time, I decide to...
View ArticleCoupling transient EM and HD calculations
Hello, I am trying to perform 2D-axi transient calculation of time harmonic magnetic field impact on liquid metal. Generally I need to solve Induction eq., derive induced EM (Lorenz) force...
View Articleextracting data from comsol to matlab through mphinterp
Hello, I have implemented the mphinterp function but when I want to extract results for different parameters something goes wrong. My typical comsolfiles look something like this: - In the Study...
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 ArticlePlease help me find how to achieve this function.
It seems to be a simple problem but I can't figure out how to make it. Description: a 2d transient model of a square is built, the left, bottom, and right side is thermal insulation and the top side is...
View ArticleDefining wires in 3d models
I am trying to simulate a process that includes flow, electrostatics and mass conservation. The model is simply a rectangular. One edge is grounded and the opposite includes 59 wires. The grounded edge...
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