how to set wall to free stream boundary condition
I'm doing simulation of the heat transfer of Fuel Cell, I have an exhaust fan on the outlet and the inlet is the hole between the stacks, due to the thousand hole of it, i would like to draw a air hood...
View Articleany other postprocessing software for COMSOL results
Hi All, Is there any other postproceesing software for COMSOL results, mainly for results by CFD module, Heat Transfer module? Thanks.
View ArticleElectric field lines
Hello, I wanted to visualize how the electric field lines develop between oppositely charged electrodes of various shapes. I had chosen electric current or electrostatics as my physics interface. Also...
View ArticleCUDA and COMSOL
Dear all, I have a new NVIDIA Quadro GPU and I would like to use it to accelerate my simulations, is it possible to use it somehow? I looked for some informations and it seems to me that CUDA it's...
View ArticleHow to select Boundaries by coordinates/boxes WHILE building the geometry in...
Hello, I am trying to automate my COMSOL model via the LiveLink interface and I am struggling at the geometry part, where I need to transform all my boundaries into "solid". I tried the following:...
View Articlelaser drilling simulation in 2D
I have performed laser drilling in 2D and obtained transient temperature distribution . I am not getting some of the steps explained in this forum Request some guidance to move the laser source inside...
View ArticleResults - Density current
Hello, I'm current working in a 2D simulation of a conceptual motor and I need some help interpreting the results. I defined a copper conductor as the boundary of a cylinder of iron. The copper...
View ArticleCoefficient form PDE with Dirichlet boundary conditions - Problem with...
Hello, I have a Coefficient form PDE with Dirichlet boundary conditions with two dependent variables. The dependent variables range -5<v1<5 for v1 and 250<v2<600 for v2. The model converges...
View ArticleRadio frequency (and general) convergence question
I have a model which COMSOL is having a very difficult time finding a stationary solution for - the solver gets a fair way, but then tends to oscillate and never settles down to a converged solution....
View ArticleStress Strain Curve at different temperatures giving problem
Hello friends, I am trying to implement engineering stress-strain data obtained at various temperatures. Based on "temperature dependent plasticity" example model and "elastoplastic " example model i...
View ArticleInterpolating 3-D data
Hi all I am trying to use some 3-D data i.e. temperature profile across and x and y surface. The data is stored in and excel file. I want to interpolate the data to form a function as T = f(x,y) and...
View ArticleImport from SolidWorks
Hi, I was following the tutorial for the cooling of an injection mold (www.youtube.com/watch?v=JyXhGKN3iX0), and I want to ask is there any way to import the curve for the cooling channels directly...
View ArticleBoundary conditions in heat transfer
Hi, I want to model a muscle tissue containing a capillary blood vessel. Now I’m using a simple model for start… My model geometry is in the attached file. As I want to model heat convection between...
View ArticleIntegro-partial differential equations
Hi I am fairly a newbie to this software and i am wondering if it can solve a set of complicated integro-PDE together. It's crystallization kinetics from supersaturated solution which has three...
View ArticleEdges are too close in 2D domain
Hi, I have some troubles while defining 3D geometry from 2D work plane. The error message was "Edges are too close in 2D domain" and it was from "Form Union" section. Would you please help? Thanks
View ArticleSolver Steps
Hi All, I'm computing a model via LiveLink with Comsol 4.2a and Matlab 2011b. It's an electrostatics model with nothing fancy in the physics / geometry. The model solves correctly, and I am now turning...
View ArticleEigen frequency analysis
hi, i am dealing with a nanotube sensor...can i use eigen frequency study step to find frequency at which displacement is maximum or should i use some other study step..
View ArticleState Space Export
Hi , i have build a simple cantilever beam model using time depented model. after defining the points of forces and parameters, i want to export the model to matlb (State Space Matrices) so i could...
View Articlegas mixture
Hi I am trying to model an ejector with 2 inlets and one outlet. In the first inlet I have hydrogen with low pressure, in the second inlet I have (hydrogen 30% + steam 70%) with a higher pressure. The...
View ArticleWeak Constraints from COMSOL 3.5 to 4.2a
Hi I have seen many posts regarding this but none had any definite answer. I am trying to follow a tutorial which involving Stoke's flow, and have the following problems: 1. "Go to Properties of mmglf...
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