volume within a closed isosurface
Hello WIthin a 3D domain containing closed isosurfaces, is there a way to calculate the volume of material contained within each isosurface? Many thanks Dan
View ArticleAxial flux permanent magnet generator
Hi Dr. Ivar/All, Iam trying to simulate the axial flux permanent magnet generator with two rotor and a coreless stator sandwiched between two rotor. Permanent Magnets are attached on inner surface of...
View ArticleUpdate 1 for COMSOL Multiphysics 4.3a is now available!
Hello, We are pleased to announce the release of Update 1 for version 4.3a of COMSOL Multiphysics. For subscription license holders, access the product update at:...
View Articlestudy
sir, I worked with piezoelectric physics and frequency domain. I want to add damping coefficients. I don't know where to add in comsol library
View Articleheat transfer / convergence problem
Hi, I have a heat transfer problem where I am trying to solve movements and temperature in oil due to a submerged heat source. It seems that the convergence is a problem. There are several solvers...
View ArticleHow to plot the rms value of the electric field?
I am performing simulations of a three-phase cable in the interface electrostatic (es), and have an interest in obtaining the electric field distribution in the cable, as the simulation is time...
View ArticleUnknown 'lm' variables with Diode Example using COMSOL 4.2
I am attempting to replicate the Semiconductor Diode 4.1 Model file found at this address:www.comsol.com/showroom/documentation/model/114/ by starting from a new COMSOL file and essentially applying...
View ArticleEvaluate total force acting on a body
Hi everybody! I made a simulation of a rigid 3d body moving inside a fluid at constant velocity. I used the Stationary Laminar Flow study. Everything works fine, but now how i can find the total force...
View ArticleSeperating geometry
I have a very simple model a cube inside a cube, but I cannot apply different materials on them. I want to seperate two cubes so that I can apply two different materials to them.
View ArticleHow to redeuce memory requirement during comsol simulation
I am new to comsol. I recently built a simple 3D model in comsol. Oops - it used way much more memory than I expected. I used to build models with millions of nodes and never had any issues. But now...
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Area terms while using Axial Symmetry
Hello everyone, I have what I beleive to be a somewhat simple question. I would like to model simple heat convection out of a cylindrical wire or water pipe. It really doesn't matter what it is, just...
View ArticleTotal Stress Tensor
Hi I am trying to calculate Total Stress Tensor in a fluid.i know that: Total Stress = -pI+Shear Stress(or viscous stress) I want to know what this pressure is in this equation for moving fluids...
View ArticleComplex valued field in Helmholtz PDE interface
Hello all, I'm working on a model with the Helmholtz Equation interface in 1D. I'd like to be able to make the variable, u, complex in order to get phase information out of the result. I've looked...
View ArticleGenerating UV-Vis Spectrum of spherical nanoparticles.
Hello I am new to Comsol. I was wondering what is the best way to simulate the UV-Vis absorption spectrum of metal nanoparticles, ie Au, or Ag. I understand that I should use Mie Scattering theory. I...
View ArticleLid-driven cavity flow (2-D): Visco-elastic materials
Hi, I am trying to model flow of visco-elastic materials (using Oldroyd-B model) in a lid-driven cavity. In this problem the top boundary/wall is sliding, whereas the side and the bottom walls are...
View Articlelid driven cavity flow
Hi, My problem concerns with a square geometry with an oscillating lid. I wanted to know how to give the boundary condition for a wall to oscillate. Thank you in advance Ameya
View ArticleOscillating boundary condition
Hi, How can we impose oscillating boundary condition in terms of velocity, on a boundary of a defined geometry. Thanks in advance Saurabh
View ArticleWhy we need 6000 Volatge for microgripper
In the microgripper model given at comsol website at linkwww.comsol.co.in/showroom/down...e/models.mems.microgripper.pdf It is written to apply a volatge of 6000 Volt.(written on page 2 of the paper)...
View ArticlePDE
Hi All, how I can resolve a system of equation with PDE and algebric equation in comsol? Grace
View ArticleLid-driven cavity flow (2-D):Visco-elastic materials
Hi, I am trying to model flow of visco-elastic materials (using Oldroyd-B model) in a lid-driven cavity. In this problem the top boundary/wall is sliding, whereas the side and the bottom walls are...
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