Particle tracing - particle counting
Hello to everyone, Im new to COMSOL and currently trying to work with particle tracing for fluid flow. The model we are working on is part of vascular network and we are using as physics : structural...
View Articlesurface to surface radiation in heat transfer in solids
Hi every body, in "heat transfer in solids" interface settings, in the "physical mode" tab there is "surface to surface radiation" option. does COMSOL includes "surface to surface radiation" in...
View ArticleHow to implement definite integral on Boundary integration variables
Dear All, I am trying to integrate the nr unit vector along a sphere on 2D axial symmetric model. My aim is to find force acting on the sphere and when I type to the boundary integration variable,...
View Articlewhats wrong with comsol / my understandig of a differential equation? -...
a simple system: 2d a very small region (we call it region 1), which is defined to be a heat-source, and a neighboring large region (we call it region 2), that shares a boundary with the source....
View ArticleHow to change font size in the help of Comsol?
Hi, I am using Comsol Livelink for Matlab and I open the Comsol help from Matlab (using 'mphdoc' command). The help browser that I open looks exactly like the help browser of Matlab and even give as...
View ArticleInstability using PDE module
Hi all, As beginner with COMSOL I'm having a problem with the stability of my COMSOL results. In the PDE module I try to solve four coupled differential equations regarding a MHD flow in an annular...
View Articleheat transfer with conduction and radiation
hi every body I am a new user of comsol4.2, and I am trying to solve a simple heat transfer problem, This problem has 5 different layer in 3d module. But tempereature value same (equal) on everythere...
View Articlewhy do I get such figures?
Hi Friends, I have a 1D model to figure out three dependent variables of gas discharge using the PDEs module. However, it turn out to be a series of linear curves, which does not conform to the actual...
View ArticleHow to export data using comsol 3.5a scripting
Hello, I guess pretty much everything is in the title: I'm using comsol 3.5a to simulate diffusion profiles. In order to work on the results of the simulation, I need to export the data. In GUI mode I...
View ArticlePartial cut plane
Hello, 1) I have a 3D geometry. It is a pipe and I would like to do 2D cut plane. In my case I want to do partially. It means that I do not want to cut for all diameter (between boundaries) of pipe but...
View Article4.3 to 4.2a backwards compatibility??
Hi, i'm just back from the Boston conference and had carried out a bit of work on a model in 4.3 at the demo stations. I'm using 4.2a on my machine and the model won't open, just getting the message;...
View ArticleVacuum properties
Hi, While doing eigenfrequency analysis on rf module of a cylinder, if the geometry consists of only a cylinder, the cylinder is assumed to be standing is vacuum. Can I change the surrounding medium to...
View ArticleMulticomponent multiphase flow
I am currently simulating a model in which the two carrier phases involved are water and toluene and the diffusing components are acetone and methyl isopropyl ketone (MIPK). This problem is to be...
View ArticleMulticomponent multiphase flow
I am currently simulating a model in which the two carrier phases involved are water and toluene and the diffusing components are acetone and methyl isopropyl ketone (MIPK). This problem is to be...
View ArticleMulticomponent multiphase flow
I am currently simulating a model in which the two carrier phases involved are water and toluene and the diffusing components are acetone and methyl isopropyl ketone (MIPK). This problem is to be...
View Articleoutlet as inlet (interpolation function)
Good morning, I'm trying simulare a laminar flow and the transport of a diluted specie (c) in a 3D model. I would like create a loop in which the concentration at the outlet at the previous step became...
View Articlefaces are too close in 3d domain
Hi, I'm making a copy of my pipe geometry, and then when I make the 'convert to solid' the following error occur: "Faces are too close in 3D domain". Why this is occuring? best regards, gustavo
View Articlexy-planes VS yx-planes
Hi, In the quick plane tab, there are different planes, What is the difference between xy or yx when you want to plot a cut plane for a 3D problem? Best ,
View ArticleError in Sweep - Invalid Property Value
Hello community, I have a problem with a file that was running fine without parametric sweep. I tried to implement the parameter sweep, but it seems I run into troubles. Here is the error message :...
View ArticleTo find leakage inductance of a toroidal transformer
Hello, I am trying to find the leakage inductance of toroidal transformer using a 3D model. I made a 3D model using the equivalent Copper conductors as a single winding (not each windings...
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