Time dependent alternating temperature/thermal insulation boundary conditions
Hi all, I am trying to setup alternating boundary conditions for a certain boundary based on the hours of each day. My model will run for about 2 months, and I would like to set the boundary condition...
View Articletransport of dilute species
I am trying to have solute transfer in a flowing fluid only due to convection and not diffusion. If I put diffusivity to be very low, no transfer occurs at all and the concentration of solute is seen...
View ArticlePCB w/ Components simulation
Can i take my PCB w/ all the components and simulate in Comsol? My PCB is simple PCB generaly w/ Fet driver that drives a PCB planner coil
View ArticleA question about the correct boundary conditions
Hi I'm currently modeling a microwave oven. Inside the chamber is a titanium cylinder, surrounded by a susceptor in zinc oxyde. All of this is surounded by a stationary TE10 wave. I was wondering what...
View ArticleTransfer data in excel sheet
Hi, I have a contour temperature plot and its data (i.e. contour temperature plot ) would like to transfer in excel sheet. Can anyone tell me how can i transfer data in excel sheet. Thanks in advanced....
View ArticleHow to solve and verify a ODE equation?
How to solve a ODE equation with mathematical problem? And how can I verify the result correct with the mathematical answer? Thanks for help.
View ArticleTime dependent material properties
Hello I'm trying to make a simplified thermal model of a Li-Ion battery. I'm using the Joule Heating model and a time dependent study. I want to model the State of Charge with either an integration of...
View ArticleRed arrows
Hello. When the output reports can also use the source arrow, arrows will appear. Can anyone explain what these arrows have physical meaning and what can be used in the calculations? Thank.
View ArticleModeling hyperelastic material using "neo hookean"
I'm trying to model a hyper elastic material using the "Neo- hookean" proporties. It is my first time working with hyper elastic materials, and the solving of the problem is causing me trouble. The...
View ArticleCOMSOL Inventor Interface
I receive the error code: Internal JNI error when trying to open .mph in Inventor. My overall goal is to export the geometry in COMSOL: so that I can create a mask. I need the final file format to be...
View ArticleLine plots for stress distribution
Hi everyone, I'm running a simulation on a micro cantilever coated with a film. My goal is to observe the deformation and stress distribution on the cantilever, under the application of temperature...
View ArticleFluid Structure Interaction with Contact
I'm trying to simulate a reed valve combining a fluid-structure interaction model with contact (i.e. the reed closing). I have been successful so far simulating the fluid-structure interaction of the...
View ArticleOverlap integrals of variables belonging to different studies?
I am trying to calculate the overlap integral of two eigenfunctions (in comsol 4.a). Each eigenfunction is calculated from a seperate study. That is, I have study 1 and study 2 in the Model Builder...
View ArticleTurn off step size tuning in parametric continuation?
Does anyone know how to turn off step size tuning in parametric continuation? For example I want it to change the parameter in steps of 0.2. I want COMSOL to change the parameter by 0.2, and then solve...
View Articlehow to define damping in COMSOL
I am working on piezoelectric (aluminium nitride) vibrating contour mode resonators and filters.i am using COMSOL multyphysics 4.0a. i have a rectangular plate geometry and i want to find contour mode...
View Articlewho have any example or a tutorial about the comsol API javascript
Hi everyone, Now, I am reading the comsol manual about a getting started in COMSOL Java API. But it is very simple, i don't understant anything, Anyone have the stuff about this problem. Please send or...
View ArticleThermoelectric Effect
Hello, I'm working on Thermoelectric Generator and I would like to have a basic model with the equations used in COMSOL, Could anyone who worked in this field, please help. With Regards . Pheba
View ArticleContact problem. Static vs Dynamic
I have an impact model; steel presses down soft tissue. I can solve this model in static analysis with prescribed displacement. But when I solved the model in dynamic analysis with prescribed velocity,...
View ArticleSynchronous machine (torque)
Hi, I am new to COMSOL. I am tryng to build three phase synchrnous machine model. I have applied three phase voltage to the machine but unable to generate torque in a machine, I do not waht is wrong...
View Articlejava.lang.ClassCastException when using LiveLink from MATLAB
Hi there, I've been successfully using COMSOL and LiveLink for a few months now for generating and simulating electromagnetic models. However, yesterday I ran the same MATLAB code as I always do, but...
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