Thermoelectric Effect - Adding the physics
Hello, I'm working in a project on thermoelectric generator. As 'Thermoelectric' physics interface,is not in the physics area/physics list, I was trying to add the physics using the steps given in the...
View ArticleMagnetic-structural coupled analysis, result not good
This is part of my thesis. I'm trying to simulate the magneto-structural coupled analysis on a magnetic gear. The attached file is a picture of my result. The cylinder consists of permanent magnets and...
View Articlestress tensor-elasticity matrix
COMSOL assumes the elasticity matrix to be symmetric. I need to define an unsymmetric stress tensor but seems that it is impossible in COMSOL. Has anyone experienced such a problem so far? Thanks
View ArticleV4.3a ---How to set coordinate System in Piezoelectric Devices-quartz oscillator
Hi, everybody! Recently,I study quartz oscillator,I reffered the example(thickness_shear_quartz_oscillator.mph),In this example,the document writed : The crystal axes used to define material properties...
View ArticleFlipping time when accessing Study 1 solution in Study 2
I'm trying to solve a time dependent optimal control problem in Comsol 4.3. The problem takes the form of (g) two coupled nonlinear parabolic PDEs for the states (g2) two coupled nonlinear parabolic...
View ArticleHow can COMSOL AC/DC module simulate a Current Source?
How can COMSOL AC/DC module simulate a Current Source? As it is described in Wikipedia, "A current source is an electronic circuit that delivers or absorbs an electric current which is independent of...
View Articleelectric field and potential distribution
Hi I have been working on a 3D (AC/DC) model of a insulator, and I am trying to verify the uniform potential and field distribution along the insulator surface. I apply 33Kv voltage at HV end and other...
View Article2D Beam Calculations - Parameter THICKNESS and defining the force
Hi, i just found the parameter THICKNESS D in the physics solid mechanics window. By now i worked with a 2D Model to explain laminate behaviour and reduced my loads to a lineload N/m for a small area....
View ArticleElectrostatics and Transport of dilute species
Hi all, I am modelling a pn junction using the coupled electrostatic and transport of dilute species physics module for weeks now without any success. I followed the model in tutorial provided on...
View ArticleBoiling water
Hello, I am designing a humidification system for a Solid Oxide Fuel Cell test stand and I would like to know if someone could tell me if it could be possible to simulate in COMSOL boiling water in a...
View ArticleUniform Magnetic field?
Hi everyone, I am wondering how I can generate a uniform magnetic field in Comsol. Basically, I want to simulate a metal particle moving in this uniform field. Now I am thinking put all the particles...
View ArticleSolve hydro-gel swelling behaviour with comsol!!!!
Hi all, I want to solve a problem of swelling and relaxation of hydrogel with comsol. Is it possible to show swelling behave of hydrogel using comsol? Cheers!! Rajesh
View ArticleCurrent induced by a magnet
Hi. I'm really new to COMSOL Multiphysics and I think I need some help. I have a single turn coil and a permanent magnet, same radius and parallels, in 3D. I know that moving the coil, i can change the...
View ArticleTo solve electric double layer between parallel plate
Hi. I'm trying to solve electric double layer between charged parallel plate using Nernst-Planck eqn & Poisson eqn rather than Poisson-Boltzmann eqn. Because I want to research double layer overlap...
View ArticleHow to get a solution for EDL
Hi. I'm trying to solve the electric double layer structure using Nersnt-Planck eqn and Poisson eqn rather than Poisson-Boltzmann eqn. My domain is pallel plate of which height is nanometric, typically...
View ArticleModeling a Dielectric as a Real Capacitor
Hello everyone, I am having trouble modeling something. I would like to look at the conduction/conductance/resistivity of a insulating/conductive composite. It could be thought to be like a...
View ArticleBuoyancy effects for turbulence model
In nitf (non-isothermal flow), the way for setting the Buoyancy force is only can set the volume force(-rho*g)? However in somecase it is not accuracy for compare to the experiment result (the buoyancy...
View ArticleAssigning a sinusoidal electric potential to a boundary
Hello, I am relatively new to COMSOL and I am building a transformer model for use in researching different hysteresis losses and associated heat energy with using different core materials. I have...
View Articlehow to compare rectangular and triangular piezoelectric cantilever structure?
hello i am ritu tiwari, I want to compare two different cantilever structure of different geometry that is rectangular and triangular geometry. I made Length, thickness and the width of fixed side as...
View ArticleHysteresis loss Modelling of Inductor coil
Hello I have simulated inductor using AC/DC module and I have calculated the inductance and magnetic field around the inductor but now I want to calculate the hysteresis loss in the inductor. For that...
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