Fillet does not work
Hello, I've been working with a 2-D geometry and have been using the fillet tool to round the corners of a rectangle. I have been using this geometry for months and it has worked fine. However, today I...
View ArticleComsol and the Intel Xeon Phi
Hello everyone, We are considering building a workstation for use with Comsol. Does anyone know whether Comsol supports the new Intel Xeon Phi many-core co-processor, and whether it uses the Xeon Phi...
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 ArticleDispersion diagram
I want to find the dispersion diagram for a periodic cell in Acoustics using Bloch-floquet boundary condition in new version of comsol. As I could not find any manual for this case I searched for the...
View ArticleEigen Modes along Z-axis
Dear All, I am Pradeep from portland,recently started my work on COMSOL.As i m basic started i tried to start up by building a rectangular box and find out the eigen modes in it. But i can observe...
View ArticleLicense for 4.3 can not be upgraded to 4.3b?
Hello all. My department has a license of COMSOL v4.3 for Chemical Engineering Module. Can I update it for free to COMSOL v4.3b, or do I have to buy new license for the newest version of COMSOL? Thanks.
View ArticleMaximum Temperature plot
I'm trying to plot the value of the maximum Temperature in a subdomain during a transient event. Any suggestions on how to do this?.
View ArticleRF MEMS SWITCH
Hi sir, i am doing my project using comsol software.title was A NON-CONTACT TYPE RF MEMS SWITCH FOR 24GHz RADAR APPLICATIONS.here my switch is a capacitive shunt type switch which is actuated by...
View Articlerf mems switch
can anybody upload a .mph file of rf mems switch ? i am new to Comsol. and ii want to study a movement of mems switch on this s/w.
View Articleregarding the error occured during simulation
Iam designing RF mems switch I got this error while computing Failed to find a solution for the initial parameter. Segregated group 2 System matrix is zero. Returned solution is not converged. Kindly...
View ArticleHelp understanding detailed solver log and time-step size selection
Hello Everyone, Could someone please help me understand what is happening in this excerpt from one of my solver logs? I'm trying to understand what exactly the non-linear solver is 'thinking' so that I...
View ArticleSimulating pull-in with contact pair
Hi everyone, I followed the model name "electrostatically actuated cantilever" in model library to build my own model - an RF MEMS shunt switch with fixed fixed beam. In the "electrostatically actuated...
View ArticleGeometry of a cylinder
Hello! I am a beginner in COMSOL and i would like to ask you about the dimensions of a cylinder in 3D! In my model i have to design two cylinders with the next dimensions: the first one with radius =...
View Articlerf mems switch design (comsol 4.2a)
HeLLO, i'm working on designing a switch that should work on rf range. I'm able to draw 2d structure in work plane but still not able to fix one side of the cantilver beam. i hve following questions,...
View ArticleWhich surface the terminal voltage should apply to in the electrostatics...
I want to calculate the electric capacity between two metal plates then I do a model in comsol as follow: I draw two blocks with a 2µm gap between them,and the material of the two blocks are set to...
View ArticleError in the demo model ?
There is a demo example "Thermoelectric_leg.mph" available in the Multiphysics installation and it locates in directory c:\program files\COMSOL\COMSOL43b\demo\builder\thermoelectric_leg.mph". It uses...
View ArticleSolution Not Converging - Simple Cantilever Switch Pull In Voltage...
Hi, I am trying to simulate a simple switch with a cantilever beam, an oxide anchor and a substrate. My aim is to find out the pull in voltage of the switch. I used the tutorial...
View ArticleExported Data's Coordinates is dependent on Physics??
Hey... I have a strange problem. I am using Comsol 4.3 RF with Matlab to simulate a nanodisk. In Matlab there is running a loop which places an point dipole in different positions near the nanodisk....
View ArticleNo convergence at diffraction edge
Howdy, COMSOL'ers! I am performing a frequency scan of scattering parameters off a periodic structure of a 6um pitch. My solution does not converge only exactly at 6um--at 5.99 and 6.01um there is...
View ArticleConverting lines to surface/planar structures
Hi, I am working with the 3D Porous media model which allows for the specification of a fracture as a 2D object to be able to apply the Fracture Physics equation. To build my fractal geometry, I have...
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