Microwave-Oven [RF-Modul]
Hi everybody, I want to simulate a simple heating process in a microwave oven, but not that simple like in the tutorial. I attached my file, to show, what I've built yet. I want to simulate a...
View Articlechange the directory of temporary file
Hi, have you guys noticed that as comsol is solving ,there will be a lot of temporary files showing in the directory ~/.comsol/v41/configuration/comsol/org.eclipse.osgi/bundles/. is there a way to...
View ArticleError saving file
Hello, My model is based on a geometry imported from a .stp file. I use stationary electric current physics. When it solves the problem, there is a message saying "error saving file" and the result...
View ArticleBoiling heat transfer
I am new to comsol. Which is the best interface to model boiling heat transfer in a horizontal pipe ? Thanks Vishwas
View ArticleGravity effect
Hi, Sorry for my newbie question. I'm trying to simulate 2D two-phase flow in porous media. I'm wondering whether COMSOL considers gravity effect when applying Two-Phase Darcy's Law physics. Thank you,...
View ArticleSet different mesh size and track moving boundary
Hello All, I am trying to simulate solidification and heat transfer at simplified 2-D level. There is a hot melt pool in the center of a thin metal film and the size of the melt pool changes as time...
View ArticleProblem with eigenfrequency in MEMS device
I am trying to model a PZT device in order to find the resonance frequency. For some reason I get different eigenfrequencies for the same structure when I add 0-thickness electrodes and also when I put...
View ArticleMaximum Number of Eigenvalues
Hello, I am looking at eigen frequencies in a simple beam. In the end I want the modal matrix and the corresponding eigen values. The error message I receive is that I can only solve for less than the...
View Articlefield of maximum temperatures over all time steps
Hello everybody, how do I get the field of maximum temperatures over all time steps in a transient heat transfer simulation (Comsol 3.5)? I am simulating a welding process using the heat transfer...
View ArticleRotating magnetic field in COMSOL 4.2a
Hi, I'm a new user, sorry for my english. I need help in COMSOL 4.2 for making a rotating magnetic field. This is the problem : I need to simulate a NDT (non destructive tesing) for search a defect in...
View ArticleBrownian forces evaluation problem
I am using the 4.3 version to calculate the Brownian forces on a 2D geometry. My model looks pretty much like the "Brownian Motion" model from the Comsol's Model Library. The solver converges and I...
View Articletemperature effect on SAW eigenfrequency analysis
Hi all, Now I want to analyse the temperature effect on SAW eigenfrequency analysis. There is a similar tutorial in comsol model library named saw_gas_sensor.mph. That simulation is done in room...
View ArticleHow to compute diffusive flux from transport of diluted species model
Hi, I have 2D axisymmetric model with a void embeded in the model. The initial gas concentration of the model is 35 mol/m^3, with zero gas concentration outer boundaries and zero gas concentration in...
View ArticleAnisotropic diffusion
hi, I have been going through 'Separation through the dialysis' and found that the diffusion process was chosen there is anisotropic diffusion for which diagonal matrix was selected. I am just...
View ArticleHow to set a radial polarized illumination ?
Hello, I am simulating a model and the source of the model is radial polarized illumination. However I do not how to set this incident light. I hope anyone who knows the answer can tell me. I use the...
View ArticleMissing Infinite Element Domain
I cannot find the Infinite element domain node, which I thought was under Definitions. I'm using the Heat Transfer in Solids in the base package. If it is not available there, where could I find it?
View ArticleElectrostatic Precipitator... Help!!
Hello I want to simulate an Electrostatic Precipitator. In conditions of laminar flow field and electric filed, it is requierd how many particles are gathered. However, in my simulation, the efficiency...
View ArticleHeat transfer
Hi, I have a geometry of wall with several layers in it. Different layer has different thermal conductivity. The known parameters are only the thermal conductivities of different layers, thickness of...
View ArticleHow to deal with Contact problems, Adhesion!!
Hello Everyone, I am dealing with the topics of contact mechanics and adhesion. In my case, two surfaces are adhered strongly and I would like to model the detachment of contact or treat it as a crack...
View ArticleBoundary layers mesh
Hello all, My main question is related to "Boundary layers" in meshing for laminar flow physics? As I understand, Boundary layers are needed when we got a high velocity gradient touching our moving...
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