Magnetic-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 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 ArticleHow to put a solid rod inside a pipe using incompressible navier stokes.
Hi there! I am a new user of Comsol and im having troubles into drawing a solid rod that is moving into a pipe using incompressible navier stokes with transient analysis. I am using the 3.4 comsol...
View ArticlePotentian drop through electrolyte AND oxides - Expert Help Please!
I am trying to simulate a system in which two electrodes are separated by oxides and an electrolyte. I would like to plot potential profile when I apply voltage and ground to the electrodes. *A picture...
View ArticleThermoelectric 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 ArticleTwo interdependent studies - but I cannot use results from frequency domain...
Dear all, How can I use the result from a parametric (parameter 'b') sweep-frequency domain study (e.g. emw.Ez(b) ) in another function defined under Definitions (e.g. f(emw.Ez(b)) ) which is used as...
View Article"No frame is defined for 0D applications"
Hello again. I am trying to simulate an E-core transformer. When I click the study 1 and select the show default solver there is an error occurs "No frame is defined for 0D applications" . What is it...
View ArticleContact problem in solid mechanic: sover don't convert
Hello! I want to simulate a screw in a boneblock which is bonded with a force vertical to the screw axis (see picture). The two blocks are a union with differend materials. There are used 3 different...
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 ArticleHow can I define an PML in model solids mechanics ?
I need a help ! I'm using a model of a small rectangle onto a large rectangle 2D axisymmetric to denote of wave propagation I have to put the PML absorbed wave to not be reflects But when i put it and...
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 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 ArticleError
Dear all, Newely I have started to USE COMSOL In my simulation result it is showing the following error: Feature: Stationary Solver 1 (sol/s1) Error: Failed to find a solution Tell me what it mean...
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 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...
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