changes in geometry
hi, am designing a 3d comb drive accelerometer, i have made some perforations in the proof mass( circle) when i run the model, shape of perforations changes to octagon..cud any1 help me wit this..
View Articlemagnetic-Fluid-Structure Interaction in a Network of Blood Vessels
The blood vessels are embedded in a biological tissue (the cardiac muscle) and, during the flow of blood, pressure is applied to the internal surfaces producing deformation of the vessel walls. In the...
View ArticleTime derivative of a surface integration in 4.3
Hi I'm using the magnetic field (mf) physic in time dependent study. I want to calculate the voltage V(t), as v(t) = - d/dt(flux phi) (time derivative of the magnetic flux). I serched the docs and...
View ArticleLater version of COMSOL has robuster and stabler solvers
Dear all, I just want to share my recent experience with a convergence problem. During last several weeks I was struggling with convergence problem. The model has two 2nd-order PDE and Electromagnetic...
View ArticleCluster computing with HPCS 2008
How can I share the Comsol with the compute nodes. Please give each step to do this.
View ArticleSpecified shear boundary condition
hello friends, i am trying to model a problem in which i have to use the boundary condition of wall as moving wall and the boundary condition of teh bubble as zero shear stress condition. How to...
View Articlecalculating a flux through a curved surface
Hi, I working on solving the electrokinetics problem in the attached geometry. I solve the problem but I am having problems with post-processing. I am interested in calculating the flux through the...
View ArticleAdding physical parameters
Hi I have question,please help me I want to add some physical parameters to my waveguides,how can i do this? both of them is: parameter: signal absorption cross section at 1527nm (σ12) value:4.8*10e-21...
View ArticleUsing interpolation to define temperature-dependent material properties
Hi, I am a COMSOL beginner. Trying to added a file containing temperatures and measured material properties and then utilize an interpolation function to define the temperature-dependent material...
View Articlechoosing modes in pcf
Hi everybody ! I am using COMSOL 4.3.151. I am trying to get the norm of electric field for the LP11 mode.But I do not know for what value of effective index I will get that.I am already getting the...
View ArticleWhen we using meshing?
Hi please help me I started define a waveguide with this software,and i have a question: when we using meshing? friends please help me thanks
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 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 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 ArticleNegative port impedance
Hi All, I am currently doing some antenna modeling. The antenna is excited by a 50 Ohm coaxial port. I get reasonable S11 results at resonance but the lumped port impedance is negative e.g. -5 Ohms....
View Articlehow to create polar plot in journal bearing
hello, need some help from u all to plot these polar plot. these study about pressure distribution around bearing surface of hydrodynamic journal bearing.. radius bearing : 50mm height bearing : 50mm...
View ArticleConvergence problems with non-newtonian power law fluid
Hi, I'm modeling fluid flow through a microfluidic bifurcating network. Among other things, I am calculating the volumetric flow rate for a given applied pressure and comparing it to experiment. The...
View ArticleQuestion about using multiple processors in Gui mode for "form union" operation
Hi, I am currently working in the RF module on a cluster. Right now, I'm working with a very large geometry (large in that it contains many domains). It is so large that it takes a very long time for...
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