time discretization in comsol?
Hello, Would you please help me to find general information to know how Comsol works? I need to know more details : how Comsol starts to solve the equations(pde)? or for example time discretization in...
View ArticleMesh concentric cylinders!!!
Hi, I have problems with the Mesh for two cylinders concentric, like a optical fiber but in 3D, the errors are in the Mesh because always received the errors in this part, somebody knows how are the...
View ArticleNo Laplace Pressure (interface curvature) in multiphase level set simulation
Hello everybody, I am simulating in version 4.3 a drop of oil in water with the level set multiphase module coupled with the electrostatic module as in the electrocoalescence example from the model...
View ArticleLaser beam in comsol
Hi, I want to input a laser beam in comsol and see its effects after passing through a grating, mirror etc. Is this possible to do? Thanks
View ArticleMixed Ionic/Electronic Conductor
Hey guys, So my lab is trying to model a mixed ionic/electronic conductor, and we're able to successfully do so if we just treat the electrons and holes as any other charged species and put everything...
View ArticleCentroid/Center of mass
Hi, I have a COMSOL geometry composed of many different domains, each acting as an individual "grain" structure in a metal. I would like to find the centroid of each individual domain. I could find the...
View ArticleCentroid/Center of mass
Hi, I have a COMSOL geometry composed of many different domains, each acting as an individual "grain" structure in a metal. I would like to find the centroid of each individual domain. I could find the...
View ArticleCentroid/Center of mass
Hi, I have a COMSOL geometry composed of many different domains, each acting as an individual "grain" structure in a metal. I would like to find the centroid of each individual domain. I could find the...
View ArticleCentroid/Center of mass
Hi, I have a COMSOL geometry composed of many different domains, each acting as an individual "grain" structure in a metal. I would like to find the centroid of each individual domain. I could find the...
View ArticleCentroid/Center of mass
Hi, I have a COMSOL geometry composed of many different domains, each acting as an individual "grain" structure in a metal. I would like to find the centroid of each individual domain. I could find the...
View ArticleCentroid/Center of mass
Hi, I have a COMSOL geometry composed of many different domains, each acting as an individual "grain" structure in a metal. I would like to find the centroid of each individual domain. I could find the...
View ArticleCentroid/Center of mass
Hi, We have a geometry which has lots of domains and we need to assign different material properties in an automated fashion to all the domains (using a script in MATLAB). Furthermore, the material...
View ArticleTorque Calculation between diametric magnets
I'm trying to calculate the torque imposed on a diametric magnet as it rotates within the field of another permanent magnet. The model appears to work, however the values I am getting for the torque...
View ArticleEigenfrequencies of a spring WITH Gravity
In the real world, I have a flat steel beam that is acting as a spring. It starts out curved into a semicircular shape, and then it is loaded with a hanging weight that brings it down flat. I want to...
View Articlerf mems switch design (comsol 4.2a)
HeLLO, i'm working on designing a switch that should work on rf range. I'm able to draw 2d structure in work plane but still not able to fix one side of the cantilver beam. i hve following questions,...
View ArticleSynchronous machine (torque)
Hi, I am new to COMSOL. I am tryng to build three phase synchrnous machine model. I have applied three phase voltage to the machine but unable to generate torque in a machine, I do not waht is wrong...
View ArticleLumped port in Joule heating
Hi, I want to study the distribution of heat and magnetic flux density of a structure. So how can I couple the AC/DC and the heat transfer modules? Specifically, I want to use the lumped port in AC/DC...
View ArticleComsol does not finish the calculation even though convergence criteria is...
Hi, I have a rather strange problem with COMOL and hope that anyone can help me. I am trying to solve a "free and porous media flow" on a 3d geometry. The calculation is not converging very well but it...
View ArticlePost removed for no apparent reason
Dear administrators or moderators, i posted a Discussion the other day about getting wrong results in the AC/DC module and it was removed. Now, i just read again the "Rules and guidelines" and could...
View ArticleHow do I load arbitrary current to the coil in comsol?
In comsol, I want to give the coil arbitrary current defined by interpolation, but it always wrong. My specific approach is: (a) the global definition, using interpolation method defined excitation...
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