Rotation angles for SC-cut
Hello, I try to simulate a SC-cut quartz resonator. I use the "Rotation angle method" in the "Coordinate system settings" window to define the orientation but I am a bit confused about the consecutive...
View Articlebeam vibration by a shaker
Hello, eneryone. I am doing a project simulating a simple beam structure vibrated by a shaker. The left end of the beam is fixed with the shaker. If I want to set the beam vibration acceleration at 10...
View Articletotal energy and loss in piezo model
Hello, I'm trying to determine the quality factor in a MEMS piezo resonator. But, I'm having difficulty calculating the total energy and loss. The piezo interface comes with W_tot and Q_h,tot already...
View ArticleSound Absorption Coefficient of Materials
Does anyone know how to simulate the "Sound Absorption Coefficient" of materials? I tried to build a waveguide (impedance tube) on top of the materials, but it doesn't work for high frequency.
View ArticleCan't integrate over a cross-section!
I'd like to be able to integrate over an arbitrary cross section of my model. I'm trying to integrate the poynting vector over a hole in a cavity after doing modal analysis. I'm coupling a cavity to a...
View Articletumor ablation model
hello, i am trying to make a model like" tumor ablation" model in comsol Heat Transfer Module but i want to change the current from DC to AC current and i want to plot the electric field distribution,...
View ArticleThermal Conductivity as a function of temperature
Hi all, I am trying to include thermal conductivity as a function of temperature in my model but its giving me error 'inconsistent unit'..let us say the function is -1.27E-9*(T)^3+8.09E-6*(T)^2-...
View ArticleEvaluate the electrical voltage from the magnetic field (mf) physic
Hi ! I need to calculate the electrical voltage of an electric conductor subdued to a magnetic field. The conductor is excited by a current density using magnetic field physic (mf). I want to simulate...
View ArticleInitial condition for time dependent study
Hi, I'm trying to model free vibration of a small PZT cantilever (MEMS). I need to apply some initial conditions on displacement in a time dependent study. How can i do it? Thanks Andrea
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 ArticleShow which computer is using a license
We have a network license for COMSOL 4.3a. This is a fairly large laboratory setting. People here have a bad habit of leaving COMSOL open on their workstations when they go home for the day, locking up...
View ArticleLinking problem when developing GUI with java API
Hello everyone! I am trying to develop a custom GUI in java using COMSOL API. I am following the guidelines in the API Reference, but if I try to paint the result on the GUI, I get a linking exception...
View ArticleHelp with Dielectrophoresis simulation
Hi, I am very new to COMSOL and DEP (Dielectrophoresis). I have got a simple model through the AC/DC module and I have made the simulation in DC mode instead of AC for simplicity purpose and I have...
View ArticleZero stress boundary
Hey everyone, I'm trying to figure out how to model and find the motional eigenfrequencies of a totally free cylinder. That is the requirement as I see it is to have zero stress on all surfaces while...
View ArticleHow to applicate a Magnetic field
Hello I'm beginner wuth Comsol and i wish to applicate a magnetic field into the metal structure of a surface acoustic wave sensor. Thank you for your help
View ArticleIs it possible to customize convergence criterion?
Dear all, My model has convergence problem. But the result looks good. I wonder if it's possible to customize convergence criterion, so that I can know if a global parameter converges or not. Thanks!...
View ArticleUsing interpolation tables for temperature dependent structural and themal...
This will eventually be an analysis of the thermal and structural very steep pulses but for now I am keeping it simple. (stationary and moderate time dependent loads) In trying to defining some basic...
View ArticleHow to stabilize 1D fluid in General Form PDE
I'm trying so solve 1D fluid equations (modeling a plasma): d/dx(n*v)=Sp d/dx(m*n*v^2+n*T)=Sm d/dx(5/2*n*T*v+1/2*m*n*v^3+q)=Sq q=kappa*T^(5/2)*dT/dx Where d/dx is the derivative with respect to the...
View Articlesoftware simulation forming glass
hi, any of you know what is the best software for simulation of forming glass by a bender. thanks.
View Articleparticle motion in a fluid (2D)
Hi, I am attempting a 2D model of the motion of a single particle in a fluid medium inside a microchannel. I am aware that there is a COMSOL tutorial on such a simulation. However, in the tutorial, the...
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