Add 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 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 ArticleMerging 2 models
I have a Comsol Model of a Maxwell Coil and a model of Helmhotlz coil with defined geometries. Now I want to make a simulation in which I can place these 2 coils together and simulate their magnetic...
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...
View ArticleVariable synchronous reluctance machine vs synchronous reluctance machine
I have a question regarding the design and the phenomenon of a variable synchronous reluctance machine (VSRM). When designing the rotor, is there a difference between this machine and the synchronous...
View ArticlePDE coefficient form, can coefficients be variable dependent?
Hello, I would like to solve an equation with the PDE interface in Comsol 4.2a. I use coefficient form and wonder if the coefficients can be dependent on the same varaible the equation is solving for?...
View ArticleTransient simulation output doesn't match input
Hi I'm simulating a 2mm radius magnetic loop excited by a transient current and surrounded by a 10cm air sphere, in time dependent study. I've interpolated a gaussian current input from several points...
View ArticleVideo tutorial permanent magnet
Hi everyone! I need calculate permanent magnet field. I am absolute beginner. I can draw geometry but i can not assign material. Could you send me video tutorial step by step demonstrates how to assign...
View ArticleTime varying change in parameter values
Hi. Is there a simple way to define a parameter that varies to known values with time. For example, I have data representing the change in hydraulic head in a well during a pumping test. The hydraulic...
View ArticleCOMSOL models for indirect X-ray imaging
Hi Is anyone aware of COMSOL models that deal with indirect X-ray imaging (i.e. scintillator/phosphor materials that convert X-rays into visible light, e.g. CsI, GADOX..)? I’ve been searching this...
View ArticleCOMSOL models for indirect X-ray imaging
Hi Is anyone aware of COMSOL models that deal with indirect X-ray imaging (i.e. scintillator/phosphor materials that convert X-rays into visible light, e.g. CsI, GADOX..)? I’ve been searching this...
View ArticleEuler-Euler Method
I want to use Euler-Euler Method for the simulation of fluidised bed. I have three phases in my problems, one is gas, the others are wood phase and sand phase. I see that the number of phases defined...
View ArticleALE + Coefficient PDE form problem
Hi all, I want to model a mixture of two fluids, as one of them gets evaporated. I have all the equations for mass balance, and defined a PDE Coefficient form with Neumann boundary condition over the...
View Articleimporting 2D mesh in comsol ?
Dear All, I am using a geometry imported from CAD and i d like to select a single face and transform it to get only to work in 2D. Basically i d like to solve it in 2D. How can i do to import geometry...
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