Contact Pairs in Solid Mechanics
Hello, I'm implementing a model about a sphere of a linear elastic material being squeezed between two plates (lower plate rigid, upper plate moving downwards). To consider the deformation of the...
View ArticleEditing Heat source equation in 4.1
Hello, I have to heat a solid 5mm diameter sample using laser. I was succefull in siulating a source at the surface and ged a good temperature distribution. But I would like to include another term....
View ArticleHow to set the time step dt to a specific value when calculating for...
Hello everybody, I am now simulating a transient problem using Electric current mode but I do not know how to set up the time step dt to a specific value. Anybody have experiences about this, please...
View ArticleCan I do Cluster Computing in Trial Version of 4.3a
I have been trying to do cluster computing after adding a parametric sweep successfully in trial version of 4.3a. The advanced study options is selected and in the job configurations, i could not find...
View ArticleWhich Physics to choose?
Hello Friends, I am trying to apply voltage and wish to check the conductivity in the dielectric material, which physics should i choose??? Thanks in advance
View ArticleMoving laser
I'm a simulation a moving laser though a zinc pill, the problem is that i can't move the surface with the heat flux, the thing is that if i use a Parametric sweep Comsol will compute one point and...
View ArticleDoubt about transitorial analysis
Greetings! I have a doubt about transitorial analysis. Let me explain: I´ve been looking for tutorials about the subject and I found one of CFD concerning a cylinder, I leave the link so you can check...
View ArticleHow to apply AC voltage on two capacitor plates.
Dear All Hope you will be fine. I am beginer in the comsol, i want to model the electric field in two parallel plate capacitor by applying AC voltage to it and to see the electric field. I don't know...
View Articlewhere can i find the error message in the help documents of comsol4.1?
Dear all, An error occured saying that undefined value found! where can i find the relevant explanation for this error? Regards Song
View Articleintensity in acoustic
Re: Hi when you start with COMSOL try to use only 1 physics at the time, test yourmodel physics by physics, once you have got the 3 fundamental physics working alone (with fixed values for the...
View ArticleConductive Media DC model with incorrect result after changing boundary...
Hello COMSOL Community, I´m working on a 3D Conductive Media DC model of a probe which is used for geoelectrical measurements. The probe consists of a 4 electrodes array. At the outer electrodes...
View ArticleOut-of-core MUMPS
Hi, I have a question related to the "out-of-core" option. Suppose I have 32GB of RAM available, which is the best approach to use to solve a strongly coupled problem with around 2 millions DoF? 1)...
View ArticleDerivative with respect to parametric sweep Variable
Hello, I am having troubles to get a derivative of a Variable which does not directly depend on a sweep parameter. For Example: Variable: A1=intop1(rmm.Az)/Surface Now I define a sweep parameter called...
View ArticleBreakdown voltage of parallel capacitor.
Hi there. I am designing a simulation of the breakdown voltage of a parallel capacitor. So what I'm trying to figure out is, how the easiest way to to this is. For starters I guess it could be...
View ArticleError: Parameter lists gives empty sweep
Hello, I would like to know the reasoning behind this error in return of a monotonously incresing series of frequencies. Examples: a) 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 90,...
View ArticleConjugate heat transfer pipe flow
Hello, I am trying to simulate a very simple laminar flow inside a pipe problem with a constant temperature at the walls. I have a cylinder made of water(liquid), and where one part is kept at a...
View ArticleMotion due to a magnetic field
Hello everyone, I am pretty new to COMSOL so this might be a simple question to answer. I want to 2D simulate the attraction between a magnet and an iron bead which are located in air (see attachment...
View ArticleError:-18, COMSOL with MATLAB
Dear COMSOL Experts, When I run my own created model using COMSOL LIVELINK with MATLAB, COMSOL with MATLAB window shows an error:-18. After all the commands in the function scripts are executed, it...
View Articlefrequency-dependent material - with coupled physics
Hi, In the RF module, I have two EMW physics (emw1, emw2) with user-defined frequencies, f1 and f2, which are fully coupled and solved simultaneously in the frequency domain. So for example,...
View Articlemagnetic field -problem with mesh in a frequency domain study
Hello, I have some convergence problem in my 3D study. I build a geophisycal magnetotelluric model, a stratified earth (layers at different electrical conductivity ). I will measure the impadance at...
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