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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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Importing

How can i import a 3D RC model from auto-cad so that it shows all the concrete and reinforcement details.? because every time i import it. it comes to comsol as a solid lacking the reinforcements..

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thermal model

Hi everyone, I am working on a thermal model and used conjugate heat transfer for simulation. My problem is when i want to calculate the thermal efficiency of the flowing fluid (cooling) by identifying...

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automatic resmeshing

Hey, I tried using the "automatic remeshing" feature in the new version of COMSOL (4.3) and it repeatedly gives the error as "intersecting mesh elements" . Please help me resolve it. Besides, I am not...

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Setting up a previously solved physics as an initial condition for a second...

I am new to COMSOL 4.3a and I have what seems to be a simple dilemma, but I can't figure it out. I have a model incorporating three different physics. I want to run COMSOL to solve for the first...

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