Urgent : Boundary layer meshing problem
Hi, I need a help to understand the boundary layer meshing in COMSOL. I have an axisymmetric model of a simple cylinder of diameter radius 6 mm. For the penetration depth of 0.14 mm at the outside...
View Article2D Flow past moving cylinder
Hi, I'm trying to develop a 2D model inspired from a model library (Flow past stationary circular cylinder). I want to define the displacement of the cylinder in y-axis with sinusoidal force...
View Articlehow to read 3d graph..
I have attached the screenshot of a pressure graph.please let me know what the x,y and z axis represents.
View Articlesurface plasmon resonance on channel waveguides
hi, I m working on spr based channel waveguides for biomedical application. can anyone pls tell me the tutorial links of modelling spr in comsol as i couldnt get any.
View Articlesurface plasmon resonance on channel waveguides
hi, im working on SPR based channel waveguides for biomedical applications using comsol 4.2 a. can anyone pls suggest me any tutorial links of spr using comsol since i couldnt find any.
View Articlesinusoidal function
Dear all I have to use a sinusoidal function [e,g X0+(X1*(cos*(w*t)))]. Where and how can I write it? rgds Anup
View ArticleSetting pressure point constraint in closed fluid mechanics problem
Hi My problem involves a closed sphere filled with magnetic fluid put near a rectangular bar magnet. Physically when this is done there is a pressure build up in the fluid because of the magnetic body...
View ArticleImporting dxf files created in autoCAD into Comsol 4.0a
Hi I am trying to import dxf files created in autoCAD into Comsol as to create a 2d model. I am having problems when it comes to anything circular. Square or rectangular objects are fine, but when the...
View ArticleConvergence problem of contact mechanics
Hello, Following the earlier discussions on implementing an algebraic equation into a structural mechanics model, I fortunately got away with writing out explicitly an analytical solution. Thanks a lot...
View ArticleDefine Young's Modulus as a piecewise function dependent on strain
I'd like to define a new material with a nonlinear Young's modulus as a piecewise function dependent on strain. I've defined the piecewise function under Global Definitions, but I'm confused as to what...
View ArticleWhy does my parametric sweep slow down?
When doing nested parametric sweeps, they start off fast but slow down to a crawl eventually. What am I doing wrong here? Is there a faster way of doing this? Seems it has little to do with my computer...
View ArticleExciting batch mode while keeping parametric results
Hello all, I am faced with a problem. I launched a batch calculation on a file where I forgot to remove one study step. The first one is parametric and had finished without trouble. The second one is...
View ArticleHow to Use Solutions from Previous Study as Initial Conditions
I'm trying to perform two RF simulations on the same model, but with two different sets of material definitions. The goal is to run a simulation on the first model and then use that solution as the...
View Articleusing comsol multphysics to add structural mechanics
i'd like to add the Stress and strain tensor equations and others into the comsol multiphysics plane strain (this is hopes of including gauss's law -which i can already do- to make the piezoelectric...
View ArticleBoundary conditions of one domain embedded in another domain
Hello I have two domains, one is rectangle(domain 1) and another is ellipsoid void (domain 2) embedded in rectangular domain in 2D axisymmetric. I am doing transport of diluted species. My ICs are that...
View Articleidentifying domains automatically
Hi, I have a complicated geometry containing several hundred domains and I would like to be able to identify each domain given a point in it. Does anyone know how to do this? In Comsol 3.5 I would have...
View ArticleVersion 4.3a
I just download the version 4.3a which previous version is 4.3 Now I having difficulty on open the file took about a hour to loaded. the problem is extended to saving the file. I wait for very long to...
View ArticleJoule Heating + Skin effect
Hi to all, I want to simulate the group effect of skin effect and Joule heating in a conductor. So I built a simple model of a conducting block and used Magnetic and Electric Fields (mef) and Heat...
View ArticleCan I use beam module in structural mechanics to analyze plastic problems in...
Hellow, Can I use beam module in structural mechanics to analyze plastic problems in a beam? I have tried to use the variable Young's modulus to simulate nolinear stretch, but I don't know how to...
View ArticleRadition pattern
Dear Fellows, I simulated dipole antenna and calculate the normalized electric field in the gap of the antenna (near field). Now I want to plot the radiation pattern. Can you tell me where I can find...
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