Using saved solution Comsol v4.1
hi, I want to use the saved solution for the initialization of the second one. for example I solve my problem with a given boundary condition and I want to increase the boundary value for the next...
View ArticleCoupled magnetic and solid-mechanics simulation
I have a question about coupling a magnetic study to a solid mechanics study. I attach to this email a simple model to explain my question. In the model you can find a permanent magnet with a round...
View ArticleCluster job that shows speed-up when using multiple nodes
Hi, I would be highly interested if someone could post an mph model file that they have shown to see speed-up when distributed across multiple nodes. I am having difficulty seeing any speed up for a...
View Articlecomsol software
Hai sir, i'm studying final yr electronics and instrumentation dept... i do my project based on 6 axis torque force sensor using comsol software.. so please give your opinion and suggestions....
View ArticleImport geometry from Matlab into Comsol
Hello, First of all, I want to emphasize that I am a beginner with Comsol. I am trying to import a geometry generated with Matlab into Comsol in order to study the wave propagation in this geometry. My...
View ArticleSector symmetry on a 1/5 3D electro motor
Hi All, i have a 3D model that shows only 1/5 of whole motor. It has 3 phase and 5 pool pairs. i'm using rotary machinery modul 3D. if i disabled all continuity BC on the outer slice surface, it...
View Articleelectromagntic propagation through three layers
hello I am student on electronic and I am trying to simulate with comsol on rf module , in summarize my work is to simulate the sun light propagation through three layers bonded to each other and I had...
View ArticleStraw Poll: Who would like to see the model gallery documentation overhauled???
Hello all, I thought I'd post this here to get the community opinions before suggesting it to support. If I want to learn how to use an aspect of Comsol I work through example models and I visit the...
View ArticleQuestions of the modelling of a light bulb using Heat Transfer Module
Dear all: Now I am trying to carry out some simulations using heat transfer module. To start with, I downloaded the "free convection in a light bulb" model, which can be obtained from:...
View ArticlePropagation loss in SAW devices
Hello! I use Comsol for SAW device simulations and design some time domain models for SAW delay line. Results (impulse responses) are rather good. Now I want to introduce propagation losses in my...
View Articleparticle size and geometric constraint of channel
Hi, I designed a microfluidic channel with gaps at 10 um. Of course, particles with diameter at 1 um can go through this gap, but particles with diameter of 15 um still can go through this gap, which...
View ArticleClassic PDE Helmholtz Equation
I am trying to use the 3D Classic PDE for Helmholtz Equation for diffusion through a cylinder. I have not used Comsol much before, and I am a little confused on the Sub-domain/boundary conditions. The...
View Articleerror message when define interpolating function in matlab (other function...
Hello everybody, whenever I define an interpolation function in matlab with model.func.create('int1', 'Interpolation'); I get an error message (see below) - but if I write instead...
View ArticleMAKING STRIATIONS IN A SOLID CYLINDER
how do i make striations in a solid cylinder? I know it should be possible but some how cannot figure out how?
View ArticleWhere are weak contributions added in the governing equations?
When adding weak contributions to a particular physics, where are the weak contributions added in terms of the governing equations? Is it always on the left or right hand sides, or is it added...
View ArticleTry converting to triangular mesh on these faces
Dear sir, While meshing my model, only one domain didn't get meshed. And the error shown for a face which is not meshed is "Try converting to triangular mesh on these faces". And, I was not able to...
View ArticleUndefined Value Found
I was runing a 2D model and came up with this error.. anyone can help me?? Undefined value found. - Detail: Undefined value found in the equation residual vector. .There are 912 degrees of freedom...
View ArticleUndefined Value Found
I was runing a 2D model and came up with this error.. anyone can help me?? Undefined value found. - Detail: Undefined value found in the equation residual vector. .There are 912 degrees of freedom...
View ArticleProblem Modeling Capacitive Cantilever Sensor
Hi, I want to find out the pull-in voltage of a capacitive cantilever sensor. To do so I did the following: I chose to do the 2D model first to get an idea, then I added Moving Mesh (ale), solid...
View ArticleWhich solver type to use for coupled K-Epsilon and pipe flow model?
I have a heat exchanger model that I am solving with the CFD and pipe flow modules. I am unsure of which type of solver I should use. I have looked at the COMSOL example model 'heat exchanger plate'...
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