Specifying a rotating boundary condition
I would like to simulate a rotating wall condition. For simplicity, imagine a square box. On the top surface of that box there is a circle. Inside of the box is a viscous fluid. I would like to impose...
View ArticleFrequency sweep in a magnetic field interface
Hello everyone, This should be seemingly siomple problem. I am trying to model the AC magnetic field due to a coil in 3D. I am using a magnetic field interface on a simple cylinder (acting as the coil)...
View ArticleImplementing weak constraints
Hello, I am trying to implement weak constraints on my boundary using a model coupling integration variable. The idea is that flow at the boundary is determined by change in the area at that time. Here...
View ArticleHow to change the capacity of lithium ion battery
hi, I am trying to run the lithium ion battery 1D isothermal model from model library .The capacity of cell used in the model is 17.5Ah. How do I change this capacity. Thank you Syam TP
View ArticleVariable change with time
I have a question about variable change with time. I try to make a mass transfer model. The inflow concentration change with time. If t <= 1000s then C=1mol/m^3 else C=0 I upload the data and make a...
View ArticleFailed to evaluate variable Jacobian
Hi I simulate the rib waveguide with the sio2 substrate and material of the core Er:Ta2o5 i define the lambda=1550nm in global definition>parameters, and in the step 1:frequency...
View ArticleHigh current output
Hi everyone, I am simulating a heat treatment with the induction heating module and I'm facing a problem concerning the single turn coil. More specific I import as a coil excitation the a power of...
View Articleelectromagntic propagation through three layers
hello I am student on electronic and I am trying to simulate with comsol on rf module , in summarize my work is to simulate the sun light propagation through three layers bonded to each other and I had...
View Articlemf and mef huge difference
Hi, I want to compare mf and mef physics in order to know which one I have to use for my study. I work with a coil and a conductive core. I'm interesting in the electromagnetic power dissipated in...
View ArticleCoplanar Grid Detector Capacitance
Hi all, I'm fairly new to Comsol and I'm trying to obtain the capacitance for a CdZnTe coplanar grid detector (CPG). I've read up on how the the parallel plate capacitor is built up and tried it out...
View ArticleCalculating Electrostatic Force without MEMS Module
I've been having difficulty coupling the Electrostatics/Structural Mechanics/Moving Mesh applications. I was previously given advice to look up the MEMS 3D Cantilever Beam model to help me understand...
View Articleimporting txt file to create geometry in comsol 4.0a
hi can i create a geometry by importing coordinate data existing in a text file in comsol4.0a? suppose i am having (x,y) data in a text file and i want to use this data for creating geometry in...
View Articlemode analysis for hollow core photonic crystal fiber
Hi, Is there anyone has experience doing mode analysis for the hollow core photoni crystal fiber? I tried to build the model but cannot find the confined mode although I am pretty sure the parameters I...
View ArticleHow to loop simulations in Comsol 4.2a with Matlab
Dear comsolers, here is an example on how to loop simulations. I'll let you decode it. 'Preprocessing' that I did before the loop: 1. Build a model in Comsol (attached). 2. Save As Model M-File...
View ArticleJoule Heating with Thermal Expansion Simple Setup
Good Afternoon Everyone, I am new to COMSOL but have used other software for simulations (ANSYS), I am currently trying to model an aluminum wire embedded in a polyethylene substrate, just doing a 2D...
View ArticleMetal film with subwavelength size hole: Transmmittance and reflectance study
Hi I'm novice in comsol RF simulation. I'm trying to simulate transmittace and reflectance throught metal film with subwavelength size hole. My structure will consists of Air/metal/semiconductor...
View ArticleOne way multiphysics coupling within a transient simulation
Hello Fellow Users, I am solving two physics (fluid flow & species transport) in a transient simulation. The fluid flow is not affected by the concentration distribution. As of now, i have...
View ArticleMicrowave oven waveguide configuration
Hi everybody, I am trying to simulate a microwave oven using COMSOL, but I'm still a bit confused about configuring the waveguide. What is the difference between Transverse Electric (TE) and Transverse...
View ArticleWhat is the exact electric field expression when using the PORTs? -...
Dear all, In the attached 2D model, I use 'Electromagnetic Waves frequency domain' and I would like to study the light propagation inside my structure. I would like to have a input power flow at port 1...
View ArticleVariable exchange between Matlab and Comsol
Hello everyone, I am running Comsol using the LiveLink with Matlab and am trying to do the following: I have a value, dt, which is 0 everywhere in the beginning. (I can either use dt=0, make an...
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