COMSOL 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 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 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...
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 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 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...
View Articlevolume within a closed isosurface
Hello WIthin a 3D domain containing closed isosurfaces, is there a way to calculate the volume of material contained within each isosurface? Many thanks Dan
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 Articlestudy
sir, I worked with piezoelectric physics and frequency domain. I want to add damping coefficients. I don't know where to add in comsol library
View Articleheat transfer / convergence problem
Hi, I have a heat transfer problem where I am trying to solve movements and temperature in oil due to a submerged heat source. It seems that the convergence is a problem. There are several solvers...
View ArticleHow to plot the rms value of the electric field?
I am performing simulations of a three-phase cable in the interface electrostatic (es), and have an interest in obtaining the electric field distribution in the cable, as the simulation is time...
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