Weak 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...
View ArticleHow to build the dispersion curves for waveguide
Greetings I have a rectangle plasmonic waveguide (Ag on Si with air superstrate) with thickness T and width W. I would like to know what kind of modes can support my waveguide. As I understood, this...
View ArticleNatural convection in heat transfer
I am solving natural convection problem for 5hrs in which first problem start with conduction and finish with natural convection effects for solid liquid interface location. During first 1 and 2hrs the...
View Articleproblem about semi-transparent surface
Hello, i try to make a model about semi-transparent surface by using heat transfer module. i have a point heat source and a glass material in the front of this point source, there is radiation emit by...
View Articlehow to get true dimensions for using interpolation function in the other model?
Hi, I want to ask about using boundary conditions as a result. I found many discussions in the forum and I applied to my model. I segmented my model three parts and I want to use results on the other...
View ArticleFluid Structure Interaction with Contact
I'm trying to simulate a reed valve combining a fluid-structure interaction model with contact (i.e. the reed closing). I have been successful so far simulating the fluid-structure interaction of the...
View ArticleFrequency domain modal analysis of a cantilevered beam
Hello all, I am trying to run frequency domain modal analysis of a cantilevered beam. I have built the model in Comsol 4.1 and have assigned desired material properties. Have applied fixed constraint...
View ArticleHow I can combine two physics (es and emw)?
Hi, could you suggest me how to use 2 different physics inside a comsol simulation? I would like to simulate a system with electromagnetic waves physics and electrostatic physics, in order to see how a...
View ArticleALE moving mesh + electrostatics force calculation are in conflict
Hello Everyone, thanks for all the support or tips you may give on the following problem. I am trying to couple three different modules, to monitor the displacement of a bubble in a channel in 3D under...
View ArticleTwo consecutive physics simulations
I'd like to run one physics simulation (solve for 2D electric field given a particular electrode geometry), and then use the output of the first simulation (the electric field distribution) to input...
View ArticleHow to cause calculated strains from PDE for constitutive model
Hi everybody! I have a quick question for you about implementation own constitutive model. So my model describe shotcrete behaviour and it’s composed from several parts responsible for shrinkage,...
View Articletime 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...
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