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Heat transfer through a helical structure.

I am currently working on a model where I am trying to estimate the total heat gained by a cold liquid passing through helical pipe with a rectangular cross section which is being heated by a gas...

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soil plasticity in poroelasticity

I am doing a project using poroelasticity interface, but I wan to consider plasticity behavior of porous materials, so I need to use plasticity constitutive model for porous materials. How do I add...

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3D and 2D integration from the walls of a cylinder

Hello, I need to get integral from the surface of a disk and the walls of a cylinder in 2D and 3D geometries. I am fine with getting integral from the surface of a disk in 2D axisymmetric geometry and...

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Is it possible to input non-isotropic thermal expansion coefficients for...

I am using Comsol for a small project using solid mechanics physics and was wondering if I could define a coefficient of thermal expansion as diagonal instead of just isotropic for a hyperelastic...

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solution of Navier-Stokes equation for shear modulus reconstruction

Hello I am solving Navier-Stokes equation for shear modulus estimation with comsol and livelink for matlab. The equation i have to solve in comsol is ∇.μ∇u+∇(λ+μ)∇.u=0 But i can not find this form in...

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Trouble with Livelink-tutorial

Hello, I am trying to set up the busbar example taken from the 'Introduction to LiveLink for MATLAB'-PDF. I am using Ubuntu 12.04, MATLAB 2013a and COMSOL 4.3a. I am able to proceed until mphgeom() is...

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simple tissue ablation model

Hey all, Im trying to set up a very simple ablation model of cardiac trouble and am having trouble

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simple tissue ablation model

Hey all, Im trying to set up a very simple ablation model of cardiac trouble and am having trouble

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simple tissue ablation model

Hey all, Im trying to set up a very simple ablation model of cardiac trouble and am having trouble the model is a simple 2D axisymmetric geom consisting of a square with a small rectangular electrode...

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Copper Electrodeposition in a Trench

I tried to extend the Copper Electrodeposition example in COMSOL, but I obtained "inverted mesh elements" and, hence, graphical artiphacts at larger times (> 14 secs used in the original model). You...

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Waveguide amplitude errors, scattering boundary condition

Hello everyone! I am modeling a waveguide with the purpose of verification, but I am getting high errors in amplitude when the length of the waveguide is not a multiple of the wavelength of the...

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dielectric shielding

Dear all, I want to add a dielectric around a wire (A=0.1*0.1cm2). I go through COMSOL version 4.1 user guide and I found out that there is Dielectric part in Electric Current node. But I could not...

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Multi Turn Coil - reverse field

Hi, I am building a Beam-Line simulation using COMSOL 4.3.0.151, using a geometry imported from a CAD file constructed by my engineer. 1st step is to assemble the magnetic optics, for which i imported...

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The wake of a ship simulation

Hellow Everyone, I'm a really noob beginner in COMSOL.. and I've been struggling with this (a priori great) software for 3 days to create a flow around a boat (or a random floating object). My study...

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problem with 2d force calculation in rf module

hi, i am a neophyte.. i am trying to simulate the force on a dielectric particle by Maxwell stress tensor method.. but i stuck at the very beginning.. The problem is that I have to define an electric...

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about heater simulation in the room

Hello! I am use comsol 4.3a , and use the non-isothermal flow physics to simulate the heater in the room. And the room has a door , and I want to set the door is open, and it is connect to the...

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Creep - Plasticity

I want to use the non-linear structural mechanics module for simulation of plastic deformation by yielding. There is a creep module and a plasticity module. In the creep module, I find more suitable...

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how to assign conductivity to fluid flow in a microchannel preconcentration...

I am modeling a solution phase preconcentration in microchannel. My system has two inlets and one outlet. From inlet1, buffer (10mM) containing a negatively charged dye is supplied and from inlet2 same...

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Heat source: Temperature profile instead of heat

Hi, I want to use measured values to define a heat source in the "Conjugate Heat Transfer". I could already generate a 3D-function of these values which can be used as Q. But my problem is that the...

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magnetic concentrator

Hello, I work on a cold crucible for the fusion of silicon with a coil around (around 10 kHz). I have done a 3D model of the crucible to know the efficiency of the crucible (how power is transmetted to...

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