A 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 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 ArticleLi-Ion Battery Example - Works in 3.5a but not 4.0
I have recently implemented the provided COMSOL 3.5a example of a lithium ion battery in version 4.0. The problem, as stated, solves just fine in 3.5a with easy adjustment of the applied current, and...
View ArticleSImulation of an electrostatically actuated beam
Hi, I am new to COMSOL and presently trying to simulate the pull-in instability of electrostatically actuated micro beams in COMSOL MEMS module. I need further insights into the following topics...
View Articlevolumetric shrinkage
Dear all, I have a question regarding the setting of initial volumetric shrinkage rate of a geometry. I want to simulate the polymerization process, during which volumetric shrinkage happens when...
View ArticleDAE is structurally inconsistent - Induced current in coil
Hello, I am just starting to use COMSOL (4.3b) and I have encountered a problem while modelling. I am modelling two identical multi- turn coils where from one is excited by sinusoidal voltage source...
View ArticleHow To Create Cross Section In 3D
I have been simulating Mie scattering in 3D by using symmetry so that only 1/4 of my model has to be solved for. The problem I have is that I would like to plot the solutions of the full model with 1/4...
View ArticleCombining different variables into one
Hello all, i am quite new in the COMSOL world so i dont know all the possibilities that go with it and i would like to know if somebody can tell me how to combine expressions for different time steps...
View ArticleProblem with interpolation function and variable
Hi ! I'm a beginner in COMSOL 4.2a and I'm trying to simulate a model using the Microwave Heating interface. I have to consider the temperature dependance for the thermal conductivity and the...
View ArticleSetting the permittivity of particles for dielectrophoretic force in Particle...
Hello, I encountered a problem while setting up fluid model with DEP force. Direction of DEP force is dependent on the Claussius-Mossoti factor, i.e. complex permittivity of the particles and the...
View ArticleSimple export/point graph question
Hi guys, I'm working on a simulation of an electrochemical cell (simple 1D geometry with one end grounded and the other set to a bias voltage), and I'd like to export the data pertaining to the...
View ArticleUsing 3D model data as input for 2D model
Hi Everyone! I have a 3D model with coupled flow and electro-chemistry equations. The equations are weakly coupled, so I know from previous experience that I can run the flow and electro-chemistry...
View ArticleDifferent results of Simulation from Solid Mechanics and shell
Hello, I have a problem when doing a simulation with a bend pipe meshed by shell element. The results of principal strains are one time larger than meshed by solid mechanics. But the results of...
View ArticleFrequency Response Analysis
Good Evening, In my simulations I'd like to excite my object with a known force throughout a certain frequency range then have a FRF Graph of it with Frequency on the x axis and the Acceleration/Force...
View ArticleDisplacement Measurement under Magnetic Field
Hello, I have a question about calculating/simulating displacement of a tip under magnetic field. I have to calculate how much a magnetic tip deflects when there is magnetic field but I could not do...
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