Current in Induction heating (Peak or RMS)?
Hello, When solving using the Induction Heating solver, can anybody confirm if the "Current Excitation" in the "Coil Group Domain" is peak or RMS? I have a suspicion that the value to be specified is...
View Articlecome across such a problem
I use the PDEs module to make simulation of my model, but I just encountered with a few problems of which is undifined value in the stiffness matrix. I make sure that I have already defined all the...
View Articlegeometric parameter sweep
Greetings everyone, I'm running some stationary simulations using the MEMS module. I would like to make a parametric sweep for a certain geometric variable. The problem is that when changing this...
View ArticleJava heap space
My question is regarding the error with a particle tracing simulation in a magnetic field. Simulation is time dependent and has a step of 1e-6 seconds to 1 second, the mesh is around of 1 600 000...
View Articlecone-jet mode in electrostatic field
Hi, Here is my problem. I want to simulate a electrohydrodynamic (EHD) phenomenone , a nozzle with full water (or electrolyte) in a electrostatic field, the the water is polarized and deformed the...
View ArticleMatrix has zero on diagonals
Hi everyone, I am trying to simulate a flow through a channel with porous media on one side. However, I keep getting the error matrix has zero on diagonals. Attached is my file. Can anyone help here?...
View ArticleGaussia Heat Pulse in spatial and Temporal Domain
Hi All, I am trying to develop a model where I use Gaussian pulse in time and space domain as heat pulse. I am doing it in 2D, where my geometry is a simple rectangle with certain length 'x' and height...
View ArticleCOMSOL 4.3 Update 2 now available
Dear COMSOL users, A new software update is now available, version 4.3 Update 2: http://www.comsol.com/support/updates/comsol43p2/ We recommend everybody to update now. This update corrects several...
View ArticleObstacle Problem
Hi all I wonder anybody has tried to solve the obstacle(one or double) in comsol? Here is a description of obstacle problem http://en.wikipedia.org/wiki/Obstacle_problem Best, Reza
View ArticleSubset of results with same dimensionality
It seems that all of the methods of defining user datasets return data in at least one less dimension than the results generated by the model, e.g. cut planes, iso-surface, and parameterized surfaces...
View Articledifferential equations with few variables in Comsol 4.2
Hi for all! I'm trying to simulate the heat and mass transfer process in wood during drying. I need to investigate the distribution of temperature T and moisture content U in the wood during the drying...
View ArticleQuality factor for piezo device in 4.3
Hi all- I'm trying to calculate the quality factor for a piezo mems device in 4.3, using the piezo physics interface. Whenever I try to calculate it, I get an error saying that it's unable to calculate...
View ArticleHow to solve a general PDE without any physical meaning?
I am a learner for COMSOL. I am trying to solve a general PDE without any physical meaning. If anyone could help me on this or show me any tutorial, I will appreciate it very much.
View ArticleNew Book on Chemical Engineering Computing Available
Hi there, I just want to share with all of you that a new book about chemical engineering computing has recently been released. Written by Bruce Finlayson, it's the second edition of his book...
View ArticlePolysilicon vs. P-Silicon
Hello everybody I have a question regarding materials in Material browser. Is P-silicon (Polycristalline) equal to polysilicon? Because we have polysilicon too so I am not sure which on I should...
View Articlestructural mechanics in comsol 4.2
Hello sir/madam, Can i do electromechanical analysis in 4.2 version for cantilever beam type structures
View ArticleImporting the solved Soltion
Hi, I have solved a solution for a 3D object, I'm going to import this solution for another solver so that I could be able to use the results for the solution 1 and save running time. Is there anybody...
View ArticleElectric Field Simulation Problem
Hi, I am trying to create a plot of electric field, but i failed to do it. I created a simple model of column, and I used the physics of "Magnetic and Electric Fields". I defined a electrical potential...
View ArticleResonance frequency of a piezoelectric cube
Hello, I am trying to find the resonance frequency of a piezoelectric cube, using the Piezoelectric Devices physics of COMSOL 4.0. The edge of the cube is 500e-9m long, and its material is Zync Oxide....
View ArticleIs it real to simulate Full Lightning Impulse 1,2/50 us in Comsol 4.0?
Hi I simulate electric fields in high-voltage switchgear. In my models I use AC/DC Module Electrostatics (es). If the electrode is under high potential, the boundary condition for that electrode will...
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