Time 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...
View ArticleMeshing of Fluid structure interaction in a blood vessel
hi all, I am doing a FSI steady state analysis of blood vessel, the fluid domain surrounds by 4 layers (solid domains). the thickness of fluid domain is in millimeters but solid domains have diameters...
View ArticleFSI of Synthetic Jet Actuator
Dear Experts, I am working on simulation of synthetic jet actuator and i am coupling the FSI and Piezoelectric devices physics. i am trying to model case study from one of the paper that was presented...
View ArticlePre stressed frequency domain analysis - How to: Values of Dependent variables
Hello, I am trying to use the solution of the static deformation as the initial conditions for my frequency response analysis. First, I have prepared two solutions, the static deformation is calculated...
View ArticleUsing the grad-free optimization and the with operator.
Hello, I am currently using the Grad-free operator to try to solve an inversion problem. The problem consists of taking measurements of a magnetic field at the surface. We are making synthetic models...
View Articlesurface integrals
I am simulating nonlinear interactions in waveguides and would like to calculate the overlap integrals associated with those interactions. For example, I have found the modes and effective indices for...
View ArticlePotential on a surface of a sphere produced by a dipole source inside
Dear all, I would like to calculate electrostatic potential distribution on a surface of a homogeneous conductive sphere produced by a dipole source inside of this sphere. I have created a sphere and a...
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