export animation
I try to export an animation to file. Comsol 4.3a displays the animation and takes time for the writing process but the file is not actually written. What could I do wrong?
View ArticleTime dependent study convergence
Hi, I am trying to model laminar fluid flow, heat transfer in fluids, and mass diffusion simultaneously in comsol using transient solver. The problem is that when I put the upper limit for time 1...
View ArticleDouble beam resonator with electrostatic interaction
Hi all, I'm modeling a structure comprised of two beams (clamped-free), which are facing each other and are totally symmetrical (see image). The beams are made of a stack of several thin films. There...
View ArticleCompatibilty
I am using COMSOL 4.1 RF Module. When I try to open a file older than version 3.5 I got error message. Is there a way to open those files? I think I should be able to open them since the later versions...
View ArticleTransmission spectrum for optical waveguide
Hello, I am currently trying to extract a transmission spectrum from a Si waveguide on top of SiO2 substrate. There are some gold particles on top of the Si (this configuration is taken from an article...
View ArticleHow to set different thermal conductivity in different direction?
I am trying to simulate a heat transfer model which includes layers with different thermal conductivity in X-Y direction and Z direction. Is it possible to assign a user defined material and have...
View Articlesinusoidal function
Dear all I have to use a sinusoidal function [e,g X0+(X1*(cos*(w*t)))]. Where and how can I write it? rgds Anup
View ArticleNew to COMSOL. Help with structural analysis.
Hey guys, I have a 2'' hollow tube that is fixed at one end and has a point load at the other end. (think cantilever) What I need is this: I need the radius of curvature to be 3'', so I need to know...
View ArticleDamping factor
can anybody explain what exactly the " Damping factor" in context of COMSOL?
View Articlefunction
Can anyone please help to write the above equation Y=X0*(1+sin*(w*t)) where w=2*pi*f (rad/s), t=argument(s) I have tried with analytical function after defining w in variables and all other constants...
View ArticleMicrochannel
I need to connect an external current source to the electrode used in my model using electric circuit interface.the electrodes are used in Primary current distribution in electro-chemistry module .is...
View ArticleERROR: nonlinear solver did not converge, when simulating ball movement in...
Hi all, I have seen several threads about this error and tried to figure it out myself using the sample cases but I still fail to simulate this. Any help will be greatly appreciated. I am trying to...
View ArticleData export using Matlab Livelink
I have designed a magnetic coil model in COMSOL and successfully imported it in MATLAB. I am plotting norm of magnetic flux in COMSOL Model. Now I want to extract the magnetic flux data in a MATLAB...
View ArticleCoupled electromagnetics-solid mechanics study
Hi, I'd like to couple an electromagnetical eigenmode study to a forced-response solid mechanics study. More specifically, I want to do the following: 1. Solve electromagnetics model for two eigenmodes...
View Articleinteraction valve-blood
Hi! i've to simulate the interaction between an aortic valve and the blood (i use comsol 3.4). I've a pipe with two leaflets fixed with a hinge. These are what i've imposed: incompressible navier...
View Article"Time derivative only allowed with respect to mesh time." New error message...
Hi everyone, I just upgraded to COMSOL 4.2a. When I try to run a model file which works in Comsol 4.2 I get a new error I can't seem to troubleshoot. "Time derivative only allowed with respect to mesh...
View ArticleGold nanoshell simulation. Why the scattering curve is below zero?
Hi, I modified a model of Mie scattering off gold plasmonic nanopartical to simulate the gold nanoshell structure I found on comsol forum. I just add a sphere inside the original particle and built a...
View ArticleThin Film BAW Composite Resonator simulation in COMOSL 3.5a
I'm currently engaged in the simulation of FBAR device in COMSOL 3.5a, and want to use this model. However, "in the model library", I find that the admittance of electrode is defined as...
View Articleerror: The object 'Type: Save Point Geometry Tag: geom1' is not contained in...
Hi all- I have been working on a model for some time, and just trying to optimize the solver settings. I saved the model today, and then opened it up again to work on it, and now get this error for any...
View Articleextracting data from comsol to matlab through mphinterp
Hello, I have implemented the mphinterp function but when I want to extract results for different parameters something goes wrong. My typical comsolfiles look something like this: - In the Study...
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