BH Curve as function of normH and T
Hi, I'm study the induction heating of a billet and I'd like to implement a BH curve as function of normH and the temperature. I have an analytical formula for that where I compute the normB as...
View ArticleModify a surface
Hi I have just started to use COMSOL. I want to modify my surface of rectangle. I could import text file to interpolate data points. But how could I replace one of the edges by the interpolated line?...
View Articlemagnetic and electric field between two plates, with RF frequency
Dear Sir/Madam, I searched through forum and cannot find the answer to my question. I am trying to simulate electric and magnetic field between two copper parallel plates (2D axial symmetry)....
View Articlestrain dependence of relative permittivity in semiconductors
Hi, I've used the structural mechanics module for quite some time to calculate the strain state of Germanium nanostructures on Silicon substrates. A new task now is to calculate the capacity of such a...
View ArticleCalculation of a magnetic field caused by a current density
Hello everyone, I am very new to Comsol Multiphysics. I have created a quadratic conductor loop (height, width and depth) in 3D and have applied a magnetic flux density to it. By using a certain...
View ArticleComsol 4.3 with Matlab - ACDC Rotating machinery - Identity Pair
Hi Comsol forum, this is the very first time I open a new thread. I want to share (and I hope to solve) the problem which is afflicting me when I try to run a time dependent problem using Matlab 2012....
View ArticleSetting boundary condition for transient modulation of a sector of electrical...
Hi all, I was able to solve a sector of electric machine in static condition. (Full machine is 8 pole I want to solve it for 2 pole) However in transient simulation ( I mean moving rotor). The field i...
View ArticleDC discharge dc.de_4
Hi, I am starting to use the plasma module and I am currently having a look at the DC discharge example (www.comsol.com/showroom/documentation/model/8640/). During the model set up the value of the...
View ArticleSector symmetry on a 1/5 3D electro motor
Hi All, i have a 3D model that shows only 1/5 of whole motor. It has 3 phase and 5 pool pairs. i'm using rotary machinery modul 3D. if i disabled all continuity BC on the outer slice surface, it...
View Articlescattering nanoparticle cross section
Hello Sorry my English is not perfect. I have to make a simulation of a gold nanoparticle (R = 20nm) hit by a plane wave. I have to get a chart: x-axis - wavelength (200nm-800nm​​) or frequency y-axis...
View ArticlePossible to export the streamline coordinates?
Hi, I am only using the laminar flow conditions, I have plotted the streamline after the simulation, is there anyway to get the streamline coordinate from the simulation? I like to export it if it is...
View ArticleLarge Eddy Simulation
hello I want to use Large Eddy Simulation on comsol but I can't found it. Can you help how to do this. thanks a lot
View ArticleLivelink for Matlab material definition issue
Hello, My problem is the following: I am defining a RF model: [...] model.physics().create('rfw1', 'ElectromagneticWaves', 'geom1'); model.study().create('study1'); s1 = model.study('study1');...
View ArticleHelp for a better 3D mesh
Hello! I am a beginner in COMSOL and i need some help with a 3 D mesh! In my model i have to focus on the cylinders and around them. So i need finer mesh for this area but coarser mesh for the rest in...
View Articlephysical adsorption-which COMSOL module
Hi there, I am now working on a model about the absorption of solute by gold thin layer in a flowing cell. The absorption of solute by gold thin layer is physical adsorption. I want to know which...
View ArticleTrouble 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...
View ArticleWARNING: The relative residual is greater than the relative tolerance.
Dear all, I am doing an eigenfrequency analysis of a free thin layer (0.5x21cm) using the Structural Mechanics Module 4.0. I am working in the physics of solid volume with a very fine mesh (maximum...
View ArticleOptimization Module : Using design variable of previous iteration
Hello, I am using Optimization Module and having some difficulties. I want to use the values of design variable of previous iterations (n-1, and n-2). In other words, can I store the values of design...
View ArticleSpring Constant and Pull-down voltage calculation for MEMS Fixed-Fixed Beam
Hi, I'm new to COMSOL, I had tried models already given and now imported geometry from other CAD software into COMSOL. Please briefly explain me that how can I calculate Spring Constant, k and...
View Articlethe unit of volume flow
Dear sir or madam, I have a problem about the unit of volume flow. I know the standard liters per minute (slm) is widely used in industry. So do we use this unit in comsol? For example, if I give 20...
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