wireless power transmission simulation help.
I am very new in using comsol and have a little knowledge about comsol.I want to simulate wireless power system using comsol 4.3b.If someone give me some direction about how to simulate wireless power...
View Articledraw a hollow ( half radius) cylinder
I would like to draw a hollow ( half radius) cylinder with inner radius 12mm, outer radius 25mm with length 1m. I am using COMSOL 3.5a Can you tell me how is draw hollow hollow ( half radius) cylinder?...
View ArticleChanging parameter during time-dependent study with MATLAB (Does not work at...
Hello, I have a script running using MATLAB livelink. It is a time-dependent study and I would like to change the parameters defined at specific time during the study. I have managed to make this work...
View ArticleCoefficient Form PDE Coupling
Hi, I am using the Coefficient Form PDE module to simulate a material under an applied voltage. I set two Dirichlet boundary conditions for my voltage on either side of the material (imagine a single...
View Articledp/dx and dp/dy in Comsol
Hello, I am working with a N.S equation. Does anybody know that p in N.S equation is static pressure or not? How can I find out that dp/dx=0 or dp/dy=0 in my simulation? Comsol bring out p as a...
View ArticleCOMSOL 4.0 - Linear Extrusion
After learning version 3.5a, I was forced to jump into version 4.0 and have not had a good experience with the "upgrade." Making a linear extrusion from a 1D geometry to a 2D geometry in 3.5a was...
View ArticleVery simple semiconductor simulation
Hi! I'm trying to learn Comsol, but it seems have run into a wall. I've looked thoroughly through the semiconductor_diode model as well as the MOSFET model (in the showroom). However, as I implement...
View ArticleFree and porous media flow 3D simulation - convergence issues
hey all, I was using the free and porous media flow module (fp) to understand flow distribution patterns in my system. in the 2-D form it was working pretty neat. When I scaled it up to a 3D problem,...
View ArticleAC/DC rmm module - bug report
In the 2D generator tutorial, I changed the prescribed rotational velocity from 'rpm' to 'rpm*tri1(t[1/s])'. tri is a triangle function. Therefore the rotation speed should first increase, then...
View Articleopen .mat file in comsol
Hi all, I got couple of files which are in version of 3.5a, and the file extensions are .fl and .mat. I can open .fl through comsol, but I don't know how to open .mat in comsol, which can be opened...
View ArticleDerived values in different tables instead of in 1 table
Sometimes the derived values are comming in 1 table when doing the clear and evaluate all. But sometimes all the different values are comming in different tables which is not usefull to work with (copy...
View ArticleWaveguide spot size converter
Hi, I am trying to setup a 3d model, using the Wave Optics Beam Envelopes Method, for simulating fiber to chip coupling using a waveguide spot size converter. The waveguide is only tapered in the...
View ArticleElectromechanical Response of Comb Drive and Folded Spring
Hi, I am trying to simulate the electromechanical response of a comb drive capacitor and flexure folded spring. However, I have been struggling with creating the proper meshing and receiving the...
View ArticleLinear elastic material
Hi, I implied two linear solid mechanic (linear elastic material) in two rectangular(( Rectangular1)and rectangular2 ) ), there is a common inner boundary( number 2) between these two rectangular, i...
View ArticleMaximum value at each point
Hi there, I'm fairly new to Comsol so please excuse me if the question is trivial: I have modelled the temperature profile in 3D for a slab that is heated intermittently from either side. What I now...
View ArticleHeat Transfer in a Furnace
Hello. If I want to model heat transfer in an object inside a furnace that is heating up according to a time-dependent temperature function, what is the best way to simulate the heating conditions? Do...
View ArticleMixing of two different fluids
Hello, I want to model mixing in a passive mixer (suppose T mixer) with two different fluids (suppose water and ethanol) entering through two inlets and getting mix. I am not able to perform such...
View ArticleOil Tank wtih heater
Hello, I am a new Comsol user. I am trying to model an oil tank heated by a U heater.The heater use oil at a higher temperature. The cold oil in the tank is at 30°C and the hot is at 250°C.I use...
View Articleasymmetric model (Ex. cylinder) in 3D, 3.5a
How to draw a asymmetric model (Ex. cylinder) in 3D. Thanks, Vinay Patel.
View ArticleCalculating Magnetic Flux in COMSOL
Hello, Is there a way to calculate magnetic flux through a surface in COMSOL? I suspect calculating magnetic flux involves either "Subdomain Integration" or "Boundary Integration" under the...
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