Comsol won't create multiple meshes
I have a problem with Comsol and meshes. I have a carbon fibre, with copper at either end, sitting on top of a piece of glass. I illuminate the carbon fibre and look at heat transfer. I need a good...
View Articleimpose a local young's modulus on many subdomains
hi everybody i want to make a script (matlab) to impose a local young's modulus on many subdomains (attached image of my subdomain) someone have any idea how to make it ? thank you very much
View ArticleStationary / time dependent solution differs
Hello everyone, my model is a U-shaped pipe in a concrete block. Cold water (1°C) flows through the pipe and the warmer concrete (11°C) surrounding it warms up the water inside the pipe. I used the...
View ArticleAC Joule Heating question
I'm currently on a trial license trying to evaluate this product for my company. I have here an assembly of 3 connectors. One end is given a terminal condition (with 2000 or 3000 amps), the other is...
View Articlemodel coupling
Dear comsol users, I am a new user of comsol and I am building a 3d model with two physics: laminar flow and thin film-shell. I am trying to set the outlet pressure of thin-film flow as the inlet...
View ArticleHeat equation in cylindrical coordinate
Hi Does any one know how I can use cylindrical coordinate in 2D (r &theta) in heat trasnfer module for the heat equation? Basically I want to monitor conduction in radial direction only. Thanks
View ArticleA simple question for COMSOL v3.5a
Hello, I am now trying to use the femlin() in COMSOL v3.5a. According to the documentation, [Ke,Le,null,ud] = femlin(fem); Ke and Le are the stiffness matrix and load vector. null is the matrix...
View ArticleModélisation des écoulements à travers un barrage en terre
SVP , est ce qu'il y a quelqu'un qui peut m'aider à modéliser les écoulements dans un barrage en terre homogène sous COMSOL multiphysics. Ci attaché le model Le niveau de l'eau se trouve à 13 m de...
View ArticleLocal coordinate system for material properties
Dear all, we are trying to do an eigenfrequency analysis of a car tire and are struggling with defining the correct elastic material properties for the tire plies. The tire plies are fibrous composites...
View ArticleA time-dependent Free molecular Flow study
Is it possible to do a time dependent simulation incorporating free molecular flow physics in a reasonable amount of time. A stationary study is pretty fast to converge, but the time dependent study...
View ArticleCooling Towers
Can we input humidity for simulating cooling tower on COMSOL 4.3a? Can you help me with amy examples, if any??
View ArticleShallow-channel approximation with wetted wall in Laminar Two-Phase Flow
Hello, in earlier versions of COMSOL (eg. 4.1) it was possible to define a wetted wall boundary condition simultaneously with shallow-channel approximation in the two-phase flow physics. However in...
View ArticleParticle Tracing in Fluid Flow
Hi all, I want to simulate particle laden flows considering coupling between both- the particle and the fluid phases. I'm currently using the following two modules: Laminar flow(spf) and particle...
View Articlesimulation of rectangulaire straight conductor
Hi everybody, i want to simulate a straight conductor wire to find the magnetic field B and the inductance of the wire so i used the MEF in ACDC module so i defined the begining of the wire to terminal...
View ArticleHigh Viscosity in Two Phase Flow
Hi, I have constructed a two-phase flow model, using the "Droplet Breakup in a T-Junction" model in the gallery. I managed to compute the default model successfully. However, when I change the...
View ArticleMagnetic Force on an armature
Hello I'm dealing with a very simple problem that has been very frustrating for me! I would appreciate if any one can assist me with that. I'm modeling an E-shaped core in 2D magnetic field module. It...
View ArticleHow to calculate photonic band gap, transmission and reflection spectra?
We want to get photonic band gap, transmission and reflection spectra of 1D or 2D PC. Could you help me how can I obtain band gap and Transmission/Reflection spectra of 1D or 2D photonic crystal? Or...
View ArticleSurge impedance of transmission tower
Hi everyone. I am trying to model an overhead line system, in which the transmission tower should be defined as a surge impedance. I expect the wave will go down the transmission tower and get...
View ArticleSimulation of Stirling Engine
Hello everybody I'm currently trying to simulate the fluid flow in a stirling engine (beta) which I've built from the following video:www.youtube.com/watch?v=X2qssmxA82U You should try building it;-)...
View ArticleHow to define a acoustic point source
Hi all, I have a problem with Comsol. I defined a point source from 1m away from a acoustic lens, but it seems that there is no convergent behind the acoustic lens. Normally, if I use a plane wave as...
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