heat transfer coefficients
I'd like to know more about the heat transfer coefficients present in the material library. I see that it depends from the surface temperature, from the temperature at infinite distane and from a...
View ArticleComsol 4.3 with Matlab - ACDC Rotating machinery - Identity Pair
Hi Comsol forum, this is the very first time I open a new thread. I want to share (and I hope to solve) the problem which is afflicting me when I try to run a time dependent problem using Matlab 2012....
View ArticlePlot 3d result only in specific area
Hi everyone, Is it possible to plot a 3d surface data only in specific designated area? I have a 3d temperature data that has a rectangular shape and I want to plot only the upper-right area of that...
View ArticleUsing analytical expression
Dear all I have a question about analytic function, as I see for example as a default for air : It is used "rho" for "density " of material Then it is used in analytic function : "argument: pA" and...
View Articlevariable parameter in function
Dear all In my simulation I set my conductivity as a parameter of V (VOLTAGE), I use analytic functions to do that , like this: 1: (((abs(Vupvoid[V]-Vdownvoid[V]))>2000)*1)+1e-15 It means that when...
View ArticleGraphene in COMSOL?
Hi, I need to build a graphene sheet (for both 2D and 3D geometries) on an underlying substrate for simulating some experiments in COMSOL. Any help on this, as well as subsequent meshing (for...
View ArticleSimulate Joule Heating in a Wire and plot temperature Distribution
I'd like to simulate joule heating in a PVC covered copper wire in air. Then plot the radial temperature distribution across the wire and insulator. I'd appreciate any advice should it be 2D, 2D...
View ArticleOutflow BC - Concentration gradient
Dear all, I am using the Transport of Diluted Species physics. Until now I have always used "outflow" as outlet boundary condition. This means that the gradient of the concentration, at the outlet...
View ArticleApplication of different modal damping constants
Dear all, I have experimentally determined modal damping coefficients. Is that possible to use these modal damping coefficients directly in COMSOL for a frequency response function analysis?...
View Articlenon-linear kinamatic hardening
Hi all, so I am new in Comsol modelling. so I have following problem: I have to simulate a classical thermo-mechanical fatigue problem: with the thermal stress module it is for me no problem to...
View ArticleSolving multiple modules simultaneously.
As the subject states, I am trying to solve two modules simultaneously. The model is of two electrodes with a solution above them. One module is a partial differential equation in place of...
View ArticleFinding current through a surface (electrostatics model)
I have created a project in comsol 3.4 where I am have a material, with electrodes (contacts) at each end. I've created a model, and using the electrostatics model, I've defined relative permittivity...
View ArticleMultiphysics Simulation: An IEEE Spectrum Insert 2013
Hello COMSOL Community! We are happy to announce that "Multiphysics Simulation: An IEEE Spectrum Insert 2013" is now available. This edition highlights innovative multiphysics simulation projects in a...
View ArticleHow to get temperature output of a 2D surface
Hi, I am working on a 2D heat transfer model which is time dependent. Heat transfer is occurred by conduction and radiation. For getting the temperature output at the interface I use the 1D plot group...
View ArticleWork on COMSOL through MATLAB?
Hi, I would like to run COMSOL through MATLAB but don't understand how? For example when I have saved a COMSOL simulation as M-file and tries to open it in MATLAB it won't open and I am not sure how to...
View ArticleRecoverable error in residual, but solver could not recover.
Recoverable error in residual, but solver could not recover. What is the meaning of this error ?
View ArticleInduction Heating 3-D simulation in COMSOL 4.2
Hello, I'm trying to simulate the Induction Heating in 3-D simulation. Could you please tell me the components of Induction Heating (such as: Sufface Current, Ampere's Law, External Sufface Current...
View Articlelarger ICP model causing problems - singularity error
Hey, I am using your thermal_plasma model as a basis to my model. It is almost the same. The only difference is that in my model the tube is straight (not curved) and longer (0.8 m). These are the...
View ArticleCan I use COMSOL to solve integral equations?
Dear all, I have some integral equation to solve. Can I do that with COMSOL or I always need to change it to PDE? Thanks a lot!
View ArticleRuntime of plasma simulation
Dear Sir, We have some test results as stated below after so many attempts on reducing runtime of plasma module for simulating a chamber with CCP type. a. We tested several cases (such as argon_gec_icp...
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