Helicoidal geometry
Hi everybody, I would like to know how to create an helix along a cone surface (3D)? I want an helix determinated according to the cone shape. Thanks
View ArticleCan shell unit link with solid unit directly?
I want to calculate the eigenfrequency of the sturcture below (in the attachment),but I am not sure whether the model I built is reasonable, can anybody help me check it ? (I use shell unit in above...
View ArticleSolving Time-Dependent Problems - mesh size?
Hi guys! I have a very quick question. Does the MESH SIZE have an influence on the time step when solving the time dependent problems? If so, does COMSOL have some automatic changing of the time step...
View ArticleMagnetic field resulting from a dipole
Can anyone help me with the following problem? I've implemented an electric point dipole somewhere in a sphere made of 4 layers, each with a different conductivity. I want to compute the electric...
View ArticleQuestion on Poroelasticity module
I am pretty interested in the poroelasticity interface and I am going to study the theory of it. Anyone has the derivation details of this part theory? for example, formular 6-1 6-2 in the help document.
View Articledielectric properties of ice
Hi, I am modelling ice between two nonparallel capacitor plates to model its dielectric properties variation at different frequencies. I am using sweeping the frequency in the stationary studies....
View Articlehow can we simulate the cycle of tidal
Hi everybody, i have the model of concrete cube Cm x 16 Cm, i have to simulate this model with condition of the tidal, that s mean : 6 h humidification and 6 h drying so the results of the fist step is...
View ArticleComplex permittivity in electric currents physics
This seems like a simple question but I can't find a clear answer in the documentation. I wish to solve for the electric field induced by a conductive particle surrounded by an insulating membrane in...
View ArticleTime consuming post processing
Hi, I'm modelling light interaction with nanoparticle in RF module in frequency domain. I've solved model and exported it to Matlab. Then I was going to do some post processing, like electric field...
View ArticleHeat Transfer in Soils
Hi, I am a comsol user and I want to have a 2d axisymmetric model. In my model, I have a soil sample that I put a steel bar in the soil. I want to heat the steel bar with a constant temperature 500(k)...
View ArticleAdd water & salt to 1 domain
i I would like to know how to add 2 or more materials to a specific geometry, because I add water to domain 1 (liquid) and KCl (liquid ) to domain 1 , the model generates and error that is shown in the...
View ArticleGetting data in MATLAB from COMSOL model
Hello, I am currently trying to read out solution data from a COMSOL model in MATLAB, but everytime I try to run the model in MATLBA I get an error message like this: Starting the COMSOL Multiphysics...
View ArticleConvergence of Solver with Hyperelasticity - Problems
Hello, I've modeled a cantilever beam composed of Magneto-Rheological Elastomers (MAE) that bends when subjected to a magnetic field. The MAE used in the model currently uses a linear elastic material...
View ArticleIs it possible to use Scilab instead of Matlab?
Hi, did anyone try to use the free available Software Scilab www.scilab.org for interfacing Comsol? Best regards, Stefan
View ArticleIdentity pair as port source in Comsol 4
Hi all Does anybody knows how to set "identiy pair" as "port" in Comsol 4.0a or 4.1? I am calculating the reflectance and transmittance in Comsol. Previously, I used Comsol 3.5a for this work (refer...
View ArticleJob option in Batch command
Hi all, I add trouble when using the batch command recently. I prepared one file with a parametric study (different amplitudes are used in a time dependent problem). I didn't try yet the -pname and...
View ArticleIs there a simple way to obtain the historic maximum of a variable?
The variable may increase and descrease as function of time. It is needed for coupling analysis, instead of output.
View ArticleWhich solver for time dependent : Electromagnetic Waves + Solid Mechanics
Dear all, I am faced with a tricky problem for me, on which I cannot find a solution in the documentation. My model is representing a polymer that, subjected to some laser beam, expands in illuminanted...
View Articlequestion about the memory
Hi to everyone, I would like to ask a question about the memory of comsol 4.3. When it formulates the mathematical problem comsol needs to construct some matrices which will result to one or two...
View ArticleHow to install Livelink for Excel?
Hello, I have license for Livelink for Excel and want to use it. I checked with te documentation and there are a lot of chapters starting with "With Livelink for Excel installed, you can do this and...
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