Failed to generate mesh for subdomain
Hello everyone, I have a metal nanoparticle (radius = 100nm) next to an emitter embedded in glass ( n = 1.5). The computational domain around the metal nanoparticle and the emitter is also spherical...
View ArticleApproximation curve by an exponential
Hello, I would like to know if it's possible to approximate a curve by an exponential one determine and plot it on Comsol. Thks
View ArticleFrequency Domain Calculation regarding a thin steel plate with piezos
Hello, I did some eigenfrequency simulations regarding a thin steel plate with two piezos attached. (PiezoA and PiezoDUT) I placed the piezos at the maximums of a mode shape at about 122Hz. For the...
View ArticleInput Port Excitation Power for 2D RF Simulation
Hello, I'm having difficulty understanding exactly what the input power is for the port in the RF module in COMSOL 4.3. The unit is declared as watt, but unless there's some predefined thickness, the...
View ArticleUsing a Probe Value for a Stop Condition
Hello fellow COMSOL users. Can someone refer me to a model or tell me how to solve my problem. In a system undergoing resistive heating I want to use the calculated resistive energy as the stop...
View ArticleOblique incidence and floquet condition problem
In the RF module, I found that there are 2 problems. First, When the thickness of the layer which uses scattering boundary condition gets thin (below ~200nm), the direction of power flow...
View ArticleSimulation of Dielectrophoresis(DEP)
Hi there. I am a COMSOL v4.2a new user. May I know how to generate DEP effect with this software? Thanks Regards Laura
View ArticleApplying a torque to a shaft in version 4.2 class kit.
I am a college student using the 4.2 class kit. i am trying to apply a torque to one end of a shaft with the other end fixed.I tried using two point loads as a couple at one end but the stress readings...
View ArticleModel couplings as inputs to functions
Hello All, I am trying to put in a temperature average over a boundary into an analytical function. This isn't working and is producing an error. I was wondering whether anyone would have any...
View ArticleTransient contact model
Dear, I would like to use contact pairs in a transient model. In the COMSOL manual I read that you cannot use contact pairs together with the transient solver. An alternative is to use the parametric...
View ArticleThermal contact resistance
Hello, I'm trying to model a thermal sensor in contact with a solid. To do this, I need to embed a heat source in one material and then see the heat flow into a second material. I also need to account...
View Articlehow to simulate lamb wave in plate in comsol??
Hi, How to simulate lamb wave in comsol??how i will get symmetry mode & antisymmetry mode.?? pls help Regards!! Deepak
View ArticleDEP Model using Comsol 4.3
Hello, I am trying to do a DEP simulation in Comsol 4.3 and I want to apply an AC signal of 10V 14KHz in a pair of electrodes. I am presently using AC/DC model. I am able to apply a DC signal but I am...
View ArticleERROR: FAILED TO EVALUATE VARIABLE JACOBIAN, Variable: Freq
Hi, I am getting the following error: Failed to evaluate variable Jacobian. - Variable: freq - Geometry: 1 - Domain: 1 2 3 - Feature: Stationary Solver 2 (sol2/s2); - Error: Failed to evaluate variable...
View ArticleGenerate report with 4.1
I am wondering how to generate a detailed report like the one below in Comsol 4.1.resource.npl.co.uk/docs/scienc...symmetric/microdisk_report.pdf Couldn't find anything comparable in the documentation.
View Articlecomplex current density
Hi all, I'm working on getting the frequency dependent conductance and susceptance (real and imaginary admittance) of a simple resonating PZT block using the Piezoelectric Devices physics. I seem to be...
View ArticleRotate Graphics Window 90deg in 2D Axisymmetric
Hi, Is it possible to rotate (90deg.) the graphics window in 2D axi. so the z-axis is horizontal and the r-axis is vertical. Thanks!
View Articlepiezoelectric cantilever coupled with an external electric circuit
Hi Ivan, we're still working on piezoelectric cantilever coupled with an external electric circuit. We obtain very good results in the case of open circuit. When we introduce a load resistance the...
View ArticlePiecewise function implementation
I"ve tried to implement the material properties, more specifically refractive index, in a 2D model of lens. Is there a way to define a piecewise function that describes the refractive index of all...
View ArticleParallel progamming using COMSOL 4.2a
Is it possible to install a license in a cluster? I've already have a Floating Network License (FNL) from 4.2a version installed in a computer that runs in Windows. Could I install the same license on...
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