Problem with multislice view
Hi, I'm new in COMSOL and RF modeling so I started with building existing models from model gallery by following given instructions. At the moment I'm simulating model Biconical Antenna. The results...
View Articlecapacitance of a parallel plate capacitor
These are the steps for my capacitor simulation 1. set two solid blocks (dimensions (25x1x20) ) 1 distance away from each other. 2. set a solid box (65x43x60) to surround the plates of the capacitor....
View Articlefluid structure interaction
Hi , I'm facing a problem with FSI module . for the model in micro fluids library ( obstacle in fluid ) the dimensions are in microns , when increase the dimensions in Cm ( only scaling the model ) ,...
View Articledouble parametric sweep in comsol 4.2a
Hi All, I was wondering if it is possible to define to parametric sweep solvers under one study? for example changing the velocity and temperature at the same time. thanks ASAL
View ArticleContact 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 ArticleStep function
Very simple question, but I can't find out how to do it. I have a external temperature, "Temperature 1", which is 100 C. After 330 seconds I would like it to drop 80 degrees to 20 degrees. I should be...
View ArticleHow to use deformed mesh ?
Hi, I want to simulate two physics sequentially: the first one is solid mechanics and the second one is electrostatic. My geometry is simply two parallel plates and want to sweep of the force and get...
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