Finding current through a surface (electrostatics model)
I have created a project in comsol 3.4 where I am have a material, with electrodes (contacts) at each end. I've created a model, and using the electrostatics model, I've defined relative permittivity...
View ArticleMultiphysics Simulation: An IEEE Spectrum Insert 2013
Hello COMSOL Community! We are happy to announce that "Multiphysics Simulation: An IEEE Spectrum Insert 2013" is now available. This edition highlights innovative multiphysics simulation projects in a...
View ArticleHow to get temperature output of a 2D surface
Hi, I am working on a 2D heat transfer model which is time dependent. Heat transfer is occurred by conduction and radiation. For getting the temperature output at the interface I use the 1D plot group...
View Articlewhat type of physic that i should use?
as-salam and good evening.. my name is azman and I really need your help.. I got an assignment which is need me to calculate electric field when applying 5kHz high frequency 10.0kV to the electrode. i...
View ArticleWarning: Parametric solver does not support geometry and mesh dependent...
Dear all, I want to sweep a parameter, but the geometry and mesh depend on the parameter. Then I get the warning message Parametric solver does not support geometry and mesh dependent parameters. I...
View Articlelocal coordinates and material anisotropy
Hi, I am trying to build a 3D heat transfer model of a machine stator coil. As the bulk material is anisotropic i would like to keep the anisotropy consistent around the bends of the coil. This would...
View ArticleChange boundary conditions during a transient solution
Hello, in an acousitc transient simulation, I would like to change a boundary condition during the simulation. I would to impose on this boundary: 1. a pressure condition during the 100 first time...
View ArticleHow to assign a 2D random function as porous matrix property (porosity)
Good morning, I really need your help, because I can't find anything in the help files. I have a model using the the Brinkman Equations module for 2 dimensional porous media flow. I want the porosity...
View ArticleShow parameteric value on plot
I've made a model of a hi-pot test setup to visualize how the electric field changes at a discontinuity as the conductivity changes (fixed potential). I'ts working great, but now I want to make an...
View ArticleLumped Port Microstrip antenna set up
Hi folks, i am completely new to COMSOL and i am struggling with a few basic things for my uni project. I followed the tutorial for the inset microstrip antenna provided. I must have done this ten...
View ArticleScattering boundary condition and port with plane wave
Dear all, I want to simulate the periodic nanostuctures on silicon. now i am using comsol 4.3a version which is not supported PML with port boundary. for that i need to define the Scattering boundary...
View Articledielectric shielding
Dear all, I want to add a dielectric around a wire (A=0.1*0.1cm2). I go through COMSOL version 4.1 user guide and I found out that there is Dielectric part in Electric Current node. But I could not...
View ArticleEigenfrequency of Piezoelectric shunts
Hi, everyone Recently, I try to utilize the coupling modules (Piezoelectric Device+ Electrical Circuit ) to evaluate the eigenfrequency of piezoelectric shunting system. However, I come across some...
View Article"segiter" ?
Hello! I need a help please. what is the parameter "segiter" in pairs contact?
View ArticleCreate a curved cylinder in Comsol 4.3a
Hello, I want to modelling a thermal and mechanical behaviors in a curved pipes to simulate an underfloor model, so i began to draw the geometry in 3D by COMSOL 4.3a version , so the problem i can't to...
View ArticleLiveLink for CAD - can it handle multiple parts?
Hi All, Can LiveLink for various CAD products handle multiple parts or assemblies? All the documentation/videos I have seen on LiveLink show it being used with a single part. Although using a CAD...
View ArticleCoupling 1D Pipeflow to 2D axisymmetric Porous Media
I am working on coupling 1D pipeflow to 2D axisymmetric porous media. The coupling is peformed by averaging the 2D boundary to the 1D point and integrating the 1D point to the 2D boundary. The coupling...
View Articlefailed to converge with smaller scale
I am simulating plane wave in a cube with using two ports and periodic b.c. The solution is fine when I use a cube with 1 mm and for any dimension above that, when I go to micro meter I get the error:...
View ArticleFlow in an oscillating/inclined microchannel
I would like to simulate the flow within an oscillating 2D rectangular box, similar to a seesaw motion. The flow is to be gravity induced, similar to what you would expect if you place a partially...
View ArticleCreating geometry with loop
Dear All I am doing some calculations in Mechanics module. My problem is how to create circle with different radius R1.......Rn and do calculation for each radii in loop. Regards, A
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