Changed environment from air to water doesn't alter electric field
Good afternoon, I have two electrodes set apart several microns, with their voltages set to p/m 5 V, and I'm measuring the electric field norm between the two tips. I want to see what would happen to...
View Articlesingularity error
Hi, I am trying to solve a time dependent, 2D, multiphysics problem using "Transport of Diluted Species" and "Electric Current". In my model there are basically 5 domains in series: at all of them and...
View Articleweird deformation of ultra thin plate under thermal expansion
Hi, everyone, I am using the structural mechanical module to simulate the deformation of a ultra thin plate under the temperature change. the plate size is: length 100mm, width 5mm, height 0.1mm, the...
View ArticleSingular matrix: Void equations error
Hi, I am trying to model an inductor with a magnetic core in 1) Stationary analysis and 2) Frequency domain analysis. I have followed the instuctions in the sample model for a Spiral Inductor for the...
View Article2way FSI simulation - deformation of pipe due to sinusoidal flow ...
Hello, I'm going to model a simple artery , here is the model definition: =========== Model data =========== A cylindrical artery with 10mm radius, 1mm thickness and 80mm length is considered with...
View ArticleHow to extrude the polygon?
Greetings I want to get the solid object like at the attached picture (top view). To do this I have created a polygon (type - closed curve, data source - table). Now I am want to extrude this polygon...
View ArticleElectrical Circuit in Electrostatic Simulation
Hello! Is it possible to have a electrical circuit problem connected with an electrostatics problem? For example I want to connect a capacitor with a certain value to my electrostatics simulation. If...
View Articleresidence time distribution in laminar flow comsol 4.2
Hi there, I am new in using Comsol and I am trying to obtain residence time distribution by Comsol, I used fluid flow-single phase flow-laminar flow from Comsol model wizard to model flow between two...
View Articlethe velocity in the "Inductive Heating of a Steel Billet"
Hi, everyone I'm doing the simulation about sliding electric contact, which indicates that a conductor would sliding along another conductor, and they still remains electric contact with each other....
View Articlevacancy transport using drift diffusion eqn
Dear users, I am new to COMSOL. I want to simulate using vacancy transport(drift diffusion ) with current continuity and joule heating equations. But I am not sure which module should I use for drift...
View Articletumor ablation
Hello, I tried a example in the model library (Heat_Transfer_Module / Medical_Technology / tumor_ablation). But when I do the simulation. There is an error: Failed to evaluate variable Jacobian. -...
View ArticleBaw Resonator Problem
Hi I am working on a baw resonator. For our simulation we have considered a 3.5a COMSOL 2D model of Thin Film Bulk Acoustic Wave Resonator in the model archives of COMSOL. So we treid to simulate the...
View ArticleRF module and Electric Circuit
I was wondering if anyone has had any luck using the RF module along with the electric circuit module? Trying to model a dipole with a diode between leg, with an induced voltage across the terminals....
View Articleabout helix geometry modeling
Hi, I am trying to model a spiraling geometry (helix-like) with a complicated cross section. Does anyone know how to do it with comsol 4.2/4.3a? I used the build-in "helix" one but that was with a...
View ArticleGeneral question regarding dimensionality in Comsol
Hi, I'd like to ask a question about mixing problems of differing dimension in Comsol. My interest in this question comes from electromagnetics, but I think it could be useful in many areas and I...
View ArticleSynchronous machine (torque)
Hi, I am new to COMSOL. I am tryng to build three phase synchrnous machine model. I have applied three phase voltage to the machine but unable to generate torque in a machine, I do not waht is wrong...
View ArticleThin, planar multicoil electromagnet
Hi! I have been trying to model an electromagnet in 3D that is flat and coiled like a spiral on a 2D plane (so the coils get smaller as they progress towards the center of the 2D structure). It would...
View Articlemerging a 2D MATLAB plot with a 2D COMSOL plot
Hello, I have a 2D plot in MATLAB and a 2D plot in COMSOL 4.3b. For comparison purpose, I would like to merge the two figures into one. I don't know whether it is possible or not. If it is possible,...
View Articlesimulated stress contour exporting
hi, i performed a 3D simulation for a stress distribution, with stress contour lines labeled. now i would like to export the stress values and replot it using other ploting tools like Origin or Excel....
View Articlechange the thickness of the contour lines
hi, i performed a 3D simulation for a stress distribution, with stress contour lines labeled. the thickness of the contour line is a bit too thin to see. how can i change the setting of the contour...
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