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 ArticleFSI tutorial: Warning: Inverted mesh element near coordinates
I downloaded the FSI example from website. Fluid-Structure Interaction Model ID: 361www.comsol.com/model/fluid-structure-interaction-361 It is a classic problem. It looked good. But when I only changed...
View Articleproblem meshing thin layers
Dear All, I have trouble meshing my geometry(attached). My geometry consists of very thin layers(0.1mm). After reading some discussions i tried many options like giving small element...
View Articleanisotropic material
Dear All, I would like to build an RF wave guide that consists of three regions the left and right are made of air and the middle is made of an anisotropic material where epsilon (permittivity) is...
View ArticleHow to model a bipolar membrane boundary condition ?
I am working on Piezoelectric bar which I want to study its mechanical strain while an AC voltage is being applied on the system. To be able to increase the material deformation, I would like to use...
View ArticleHow to make a vacuum chamber in a capacitor?
Hi, I am trying to model a MEMS capacitor built on the silicon substrate. The thin top plate(membrane) of the capacitor is also made of silicon. The gap between the plates is vacuum sealed. So with...
View ArticleHow to set the tuning parameter for "Moving Boundary Smoothing"?
hello, i am learning to work with "Moving Mesh (ale)". I tried 'Prescribed normal mesh velocity'. There is an option 'Enable moving boundary smoothing'. A value can be give to the so-called tuning...
View Articlechange the terminal voltage at capacitor
Hi all, I'm pretty new of Comsol. I did some model for capacitor using model that found on net. But I want to change the value of terminal voltage and see the change. or change the geometry of problem...
View ArticlePiezoelectric Devices
Hi, I am working on a project where I need to fabricate a layered 3D cantilever beam in COMSOL, the base being of polysilicon and on top a layer of piezoelectric material. The problem is, polysilicon...
View ArticleMagnetic Horn as Numeric Multi Turn Coil Domain
Dear All, I am trying to setup a Magnetic Horn apparatus. It is a coil generating a toridal field where the current is injected through a radially symmetric surface. The geometry is shown in the...
View ArticleCoil Current not matching Integrated Current
So I'm doing a 2d axial model. I'm using a multi-turn coil and I am plotting the current in the coil. I've defined my voltage as a step function and that is the excitation. Just noticed that when I...
View ArticleMagnetic field density more than saturation
Hi all, I'm modeling a power inductor in comsol 4.3. I'm shocked when I saw a magnetic field density of 40Tesla in a soft Iron (with loss). I was wondering if anyone knoes the reason.
View ArticleS parameter and shielding effectiveness of RF wave incident on perforated plate
Hello: I am brand new with comsol. I would like to simulate the transmission and/or attenuation(shielding effectiveness) of the electric field passing through a perforated (circular holes) metallic...
View ArticleJoule Heating - Resistive Heaters
Hi, I've built a COMSOL model that models the joule heating of electrodes that are designed to heat up channels in a microfluidic device. I am able to choose a V0 (input voltage) run a transient study...
View ArticleLarge deformation of a 2-D square
Hello All I am trying to apply a large shear strain on a square domain. The geometry is very simple, just a square where on the upper and lower edges, opposite velocities are applied. In order to...
View Articlefrequency in time department
in the time domain for a cantilever beam to sine load, I found that the frequency of small such as the 200 hz, I obtained a point displacement for a complete sine images, but when the frequency is...
View ArticleGeneral question about multiple steps in solid mechanics
Hello everyone, I have what may turn out to be a question which makes me look like a dummy! I have been looking in the documentation for information regarding multiple steps in a simulation. For...
View ArticleTrouble coupling heat transfer physics for both fluids and solids
Hey all, So I'm getting stuck with my model where I try to couple three different physics. The three physics are: Electric Currents, Heat transfer in Solids, and Heat transfer in Fluids. Basically what...
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 ArticleAcoustic Band Structure of Metamaterials
Hi folks, I have been trying to find the band structure of an acoustic metamaterial. I have been attempting to adapt the "Bandgap analysis of Photonic Crystal" tutorial given for COMSOL 3.5a to 4.3. I...
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