How do I do a plot of total plate stress against frequency?
I have a shell plate being driven by a point load and I already have surface stress plots that show stress at particular frequencies. What I'd like to do now is do a line graph showing total plate...
View ArticleStep Function as BC
I want to implement a change in the velocity/flow in a laminar flow problem. I added the step function (tag: step1) but I am wondering what the correct syntax is when adding this in the velocity...
View ArticleConvergence: when should I stop the model?
Hi everyone I have been working on models that take several days to solve. One of them is running at the moment, and I just have a general question. When I look at the Convergence Plot 2, which is...
View ArticleHow can I export an eps image (vector graphics)?
Hello, I would like to export an image of the model geometry as an .eps file (vector graphics). I could not find how to do that and it seems that the only options are jpg, png and bmp. Thank you.
View ArticleSurface evaporation, condensation
Hi, I want to model surface evaporation from a water flow at 40 Celsius and observe the consequent condensation on a cold surface. Can you help me with the model that I should use? I could not find...
View ArticleNew "Introduction to COMSOL Multiphysics" book now available
Hello, We are pleased to announce that a new version of the "Introduction to COMSOL Multiphysics" book is now available for immediate download...
View ArticleApparent inconsistency in induction heating solution methods
Hi everyone, I'm new to COMSOL 4.3, and I'm trying to properly use the induction heating module. While modeling the problem of a current loop heating several iron inductors embedded in water in 3D,...
View Articlehow can I use plasticity model in the poroelasticity module
I want to use soil plasticity model in the poroelasticity module? How can I add soil plasticity model into the poroelasticity module? I notice I can add soil plasticity model in the structural...
View ArticleTutorial required
Hi, Does any one have a tutorial on coupling 3D SM module with 3D shell with continuity of displacement boundary condition at the interface???. How can it be done in Comsol 3.5(a). Kindest regards
View ArticleHelp understanding detailed solver log and time-step size selection
Hello Everyone, Could someone please help me understand what is happening in this excerpt from one of my solver logs? I'm trying to understand what exactly the non-linear solver is 'thinking' so that I...
View ArticleIs the Comsol Model Class a Handle Class in Matlab? Can/should I pass it as...
Hey there, I'm new to Comsol and I'm developing my first Matlab application using LiveLink. As I understand the object oriented concept in Matlab, there are two types of classes. Value Classes and...
View Articleunable to rectify the syntax error in expression
sir,i have neen trying the example problem Electroosmotic Flow in Porous Media Model ID: 11 after computing it says syntax error in expression. . .i could not rectify it. . so please give me a solution...
View ArticleSpinning Disk Trick
Hello guys! My name is Domien and I'm new here :) I'm a physics student at the University of Antwerp, Belgium. I'm currently working on my Bachelor's thesis. I'm trying to model a Spinning Disk with a...
View Articleelectroosmotic flow in porous media. . . .pls friends respond me. . . .i am...
it says expression syntax error while computing. . . plz work it out and help me how to rectify it. . . .its an example problem. . . .just type electroosmotic flow ih documentation help. . .u will find...
View Articleold model cannot be reconstructed....
I am attempting to build on a model using Darcy's law to model solute transport under saturated conditions. The original model was built in COMSOL 3.5a, and I get an error message "Old model cannot be...
View ArticleRegarding Hand Tool in work plane
Hello, I am trying to design a complex and very minute pattern in micro-meter scale on a work plane but I am not able to figure out how to move the plane while working, I need to zoom in and out again...
View ArticleStep function
Very simple question, but I can't find out how to do it. I have a external temperature, "Temperature 1", which is 100 C. After 330 seconds I would like it to drop 80 degrees to 20 degrees. I should be...
View ArticleElectromagnet modeling in 3D BH curve&relative permeability
Hi all, at start let me say I am new in Comsol. I am using v 4.0a AC/DC Magnetic Fields. What I am trying to model is type of a magnetic brake. It`s geometry is very similar to plain electromagnet,...
View Articleabout helix geometry modeling
Hi, I am trying to model a spiraling geometry (helix-like) with a complicated cross section. Does anyone know how to do it with comsol 4.2/4.3a? I used the build-in "helix" one but that was with a...
View Article3-D Modelling , Filling an open gap
Good Afternoon, I'm building a damper that has a hollow casing and a rubber-ish inside. This rubber is applied inside the case trough a direct injection. I'd like to know if I can model the casing (...
View Article