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Heat 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

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Modélisation 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...

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Local 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...

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A 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...

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Cooling Towers

Can we input humidity for simulating cooling tower on COMSOL 4.3a? Can you help me with amy examples, if any??

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Shallow-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...

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Particle 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...

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simulation 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...

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Comb drive resonator in COMSOL

Hi, I need to use COMSOL to simulate a comb drive as a resonator. I used poly-Si for the comb drive and covered it by air. I assume that I need to choose Electromechanics Physics for my model. It...

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Electron beam evaporator

Hi everyone! I need to model an electron beam evaporator as the attached figure. I use the AC/DC model (Magnetic Fields, No currents) and charged particle tracing model to simulate it. I want to...

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Finding the Domain number/Creating an entity of a feature created with the...

Hi everyone, I am using the Java API with Comsol and I really like it's abilities overall. I would like to be able to (in a for loop) create a 3D geometrical object (a cylinder) and then make that...

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Thermoelectric Model

Dear All, I am looking to find and study example models relating to thermoelectric effect modeling using COMSOL. Does anyone have any reference source/model on thermoelectrics which could be used ?...

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Setting up solver loop for 2 physics.

Hi, I have a problem that involves EM wave (frequency around 10^14 Hz) and mechanical movement (frequency 10^6 - 10^8 Hz). Basically the EM wave will give a force on the structure, and the force...

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Material properties normal to a surface?

Let's say I try to simulate a compressive force on an ellipsoid tubular made of composites (ex.: bicycle frame). For the moment I'm beginning with a very simple model, a 2D section profile of that...

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Problem defining anisotropic material (CFRP)

Hello everyone, My geometry is defined in two workplanes and one of them is rotated to the other. The material I want to simulate is carbon fiber reinforced plastic, thus an anisotropic material and it...

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High 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...

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How 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...

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Simulation 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;-)...

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Cooling of a liquid inside a tube

Hi, all I want to model the cooling of a liquid metal inside a tube flowing under laminar conditions. Specifically I want to calculate the variation of the Nusselt number on the tube wall during the...

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Moving mesh 2D

Hello, I am trying to simulate the moving boundary for a 2D geometry. I started with a simple 2D geometry where 1 boundary is moving in the x-direction and 1 boundary in y-direction, but because the...

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