Moving mesh example
Hi, Is there any example of using moving mesh with a pdf guideline? I need to model a moving magnet next to a coil and calculate the induced voltage!
View Articlemoving user defined material library
Hi, How to move user defined material library from comsol 4.2a to comsol 4.3a? Regards, Susant
View ArticleEigenfrequency study with FSI interface in 4.3a
I attempted to use the FSI interface with the eigenfrequency study step using its default configuration under 'custom studies' in the model wizard. The study step indicates a warning, however, so I...
View ArticleMagnetic-structural coupled analysis, result not good
This is part of my thesis. I'm trying to simulate the magneto-structural coupled analysis on a magnetic gear. The attached file is a picture of my result. The cylinder consists of permanent magnets and...
View ArticleFinite Elements for Fluids P1+P1 P2+P1
Dear Comsol users, Comsol sets P1+P1 elements as default for laminar flow described by Navier-Stokes equations. As far as I know, theoretically, these elements are not good for such equations. Instead,...
View ArticleCluster-Computing with Comsol
Hi! Im am trying to configure Comsol 4.1 for parallel computing on a number of nodes (currently 3) on a Scientific Linux System using PBS. I found out i had to set up a mp-daemon on each of the nodes...
View ArticleConstrains and laminates
Hello, id like to simulate a laminate with around 5 isotropic laminated layers. These layers are in the form of a plate with a constant area load. The model is a laminate for photovoltaics with area...
View ArticleModel couplings: Integration vs. Summation over nodes
Hello, I am working with two modules Structural Mechanics and general form PDE as coupled. I need a model coupling to define an integration. When I choose "Summation over nodes", my model works fine,...
View ArticleGeneral Projection Bulk Temperature Example & Question
Dear all, The following model may prove useful to somebody (other than myself) who wishes to calculate the average of some scalar value as a function of axial distance. In this case it's the bulk fluid...
View Articleelectromechanics
Hi, Can anybody tell me how to apply vaccum of 70-mtorr around my model clamped-clamped beam resonator.Something like keeping my model inside a chamber of vaccum.
View Articlemodel eye and its saccades
Hi, I'm trying to model the eye and have it oscillate about it's axis with an angular velocity. However, when I use moving mesh to create movement, I can't seem to get it to rotate about it's axis (the...
View Articleinitial Values of Variables Solved For
Hi, I have someting to know. As you know, the initial condition set is as follows: initial Values of Variables Solved For Method: initial expression, Solution Solution: Zero, Solver1, Solver2 in...
View ArticleHow to solve a ODE or PDE equation?
Hi~ I try to use COMSOL to solve the mathematical problem. I have a PDE equation in attachment. How could I use COMSOL to solve it? Thank you~
View ArticleImpedance mismatch in quasistatic
Hello everybody! I need the help of people familiar with AC/DC and RF module. I am working with a 3D structure consisting of 2 pads, 100um*200um*0.2um, separated by a 1um slot line. The pad are shorted...
View ArticlePipe flow module / Falied to evluate variable Jacobian
I am working over a simple pipe flow problem, where I encountered with an Jacobial Error saying ; Failed to evaluate variable Jacobian. - Variable: mod1.nipfl.u3 - Geometry: 1 - Boundary: 7 10 13 I...
View ArticleTheory of Brinkman equation
I'm checking the theory of the Brinkman equation in the manual. There's a term I don't understand where stems from: 2/3nu(nabla u). I also checked the given references but this term is not metioned....
View ArticleLivelink for Matlab
Hi, I would like to create a simple model using API in Matlab. When I type the command "shell.feature.create('fc1', 'FixedConstraint') ", errors "Unkonwn feature ID#FixedConstraint" exsit. I have...
View Articlemodel coupling
Dear sir or madam, I have a problem about coupling of a laminar flow domain and thin film flow-shell domain, 3d case. I have to transfer the pressure on an edge to the whole surface,shown in the...
View Articleliquid loading
I'm a beginner level COMSOL user and new to this forum. So please excuse me if I happen to ask a really silly question. I've been trying to simulate the behaviour of a piezoelectric crystal upon...
View ArticleCavitation in thin films
Relating to this topic from 2011: www.comsol.com/community/forums/general/thread/22758 Are there already tools available within Comsol to investigate cavitation effects in thin fluid films (such as...
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