3D model with two crossing symmetry planes
Dear Comsol users, I'm doing simulations with a 3D model, which has two crossing symmetry planes (xz and yz). Therefore it would be enough to simulate just a quarter of it. Now I wonder how to set up...
View ArticleHow to access the exact solution (Mode analysis)
Hi everyone, For mode analysis, by setting the computation domain large enough (i.e. 8 lambda*8 lambda), the obtained results are varied as increasing mesh density, so I am just stuck are there any...
View ArticleSolid Mechanics and Cavity
Hi, The attached models are the simplified models of my problems. In the "1 Domain" model, I have shown the deformation of model. Since I want to measure the volume of cavity (inner hemisphere), I...
View Articlepost processing
Hello In the attached model you will find under <results>-<derived values>-<point evaluation>-<votages for beamformer> a selection of voltages measured at several points. I...
View ArticleHow to find out about the variable name phys.Solid.sl (in an error message)
I get an error message:"Tensor inner product failed. Tensor product must a least have rank equal to 2.""phys.Solid.sl:item.alpha" How can I find out where and how the variable...
View ArticleMultiphysics between semiconductor module and RF module
I tried to couple the semiconductor module and RF module for solar cell applications, with no luck. I am using the 4.4 version. I wonder when Comsol will release a version which allows the coupling of...
View Article1D plot group feature
Is there anyway to make a 1D plot group, with 2 line graphs (call them A and B) such that: line graph A uses the bottom x-axis and the left y-axis line graph B uses the top x-axis and the right y-axis...
View ArticleSyngas Combustion in a Round-Jet Burner with comsol 4.3
Hi everybody i want to reproduce the problem "Syngas Combustion in a Round-Jet Burner" with comsol 4.3, this problem has been solved with comsol 4.4, but ! I don't know how to couple reacting flow with...
View ArticleFSI - complete blockage of flow
My experience with the COMSOL FSI package is limited, so I would greatly appreciate any suggestions. I would like to build an FSI model with two-way boundary coupling in which an elastic solid serves...
View ArticleGeneral Projection and Quad mesh
Hi all, I was wondering whether there are methods to use the general projection even with a quad mesh. At the moment I got the following error: "projection coupling does not support this mesh type"....
View ArticleWhat can i do to import from inventor or solid work?
If one installed CAD import module, does it mean that one as installed inventor import module, even when it it checked during installation. If yes, why is it not initializing with my inventor 2010,...
View Articledisplaying plots from two models in one window
I have two similar models but with different input and I was trying to plot grepahs from this diffrent models in one window. Anybody know how to merge the results of two models in one graph. I was...
View ArticleNernst-Planck equation
Hey everyone, I am new in using the Comsol software (4.1). I want to model ionic behavior in a conical nanopore and need to solve the Nernst-Planck, Poisson and Navier Stokes equations. However I need...
View Articlespring between two surfaces
Hello everybody, I am trying to define a spring between two surfaces but I could not, is there is a way to use « thin elastic layer « to model such spring ? However I could not select the surfaces I...
View ArticleCrash on linux:...
Hello, I have a java application which can run in standalone mode as well. When running on Windows (either from the Desktop GUI or in standalone mode), or on Linux (from the Desktop GUI), it runs...
View ArticleDMFC fuel cell
How to give 0.5M methanol in 0.5M sulphuric acid as electrolyte with platinum as electrode as input.??
View ArticleCombine multiple study runs with different parameter values
Hi everybody, I am looking for a way how to loop a study and activate in each loop run different edge currents on different parts of the geometry. (physics: magnetic fields) At the end I would like to...
View ArticleHow to model multi domain system in Comsol 4.4 ??
I want to know how to model multi domain system. I want to model adsorption cycle which consists of evaporator, adsorption bed and condenser. How can I model these domains? Also the cycle is operating...
View ArticleError in geometry buildup when running a comsol model as an m-file within a...
Hello all, I've been working on this for a little whiles and I was wondering if anyone could perhaps shed some light on my issue for me. I have a model which I run on COMSOL with no issue. Yet I wish...
View ArticleThermal expansion of a fluid or gas - how to model ?
How is the intended method to calculate thermal expansion of fluids or gases? Someone asked this years ago, but no answer was registered. see www.comsol.com/community/forums/general/thread/10927/ I...
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