Convergence issues with level-set conservative form
Hello Everyone, I am trying level-set conservative form for droplet generation in flow focusing device. I have tried the following: (a) non-conservative form: it converges well but mass conservation is...
View Articlethermal Diffusion Coefficient or Thermodiffusion
Hi all I am trying to solve a problem of a binary system for the moment using Comsol version 4.3 to study thermal diffusion or thermodiffusion. It consist of solving beside the fluid flow and heat...
View ArticleImplementing Floquet BC with Linear Extrusion/Pointwise Constraint
Hi, I am trying to implement the Floquet BC with Linear Extrusion/Pointwise Constraint as indicated in the thread : http://www.comsol.com/community/forums/general/thread/5633/ I do not have access to...
View ArticlePer-unit-length resistance and inductance extraction
Hello, I have the following question. Does anybody have any ideas how to extract per-unit-length resistance and inductance using 2D-mesh in COMSOL? I don't know, how should I excite my conductor, so it...
View ArticleMesh Error
Hi Guys, I got an error when I was meshing my object. Here it is: "Tetrahedron element has wrong orientation." Is there anybody can help me about it? Thanks
View ArticlePoission's ratio problem related to Structural Mechnics
Dear all, I just started to learn COMSOL and tried to conduct a simple simulation of deformation of an elastic plate by a face load. I used Solid Mechanics model in 4.3 edtion. 1. When I set the...
View ArticleDouble Pendulum
I am new to Comsol. I just want to visualize how a connected pendulum works. For this I created the geometry of a double pendulum and added necessary physics. But, I need to animate the geometry itself...
View ArticleModel coupling - linear extrusion, CFD
Hi everybody! I'm modeling a CFD - Problem in 3D. As described in the example "Turbulent backstep" I want to use the results of on model (velocity field of a turbulent flow) as an inlet for the next...
View ArticleCapacitance calculation
Hi, first of all, I am very new to Comsol Multiphysics. So I hope that you can help me a bit with my problem. Overall, I want to calculate the electrical capacitances between wires. So I build my model...
View ArticleSolving Error - Flowing Water between two plates
Hello, I am relative new to Comsol and need it for my master thesis. I just startet with a simple example, which I found in a youtube video, but don't get it solved. Maybe anybody can help me by...
View Article"Failed to find solution" Error in Structural Mechanics problem
Hi, I keep running into a problem when I try to solve my model on COMSOL 4.3. The geometry is pretty simple, it's a rectangular piece of Polyethylene Naphtalate, with an array of hexagon cuts. The...
View ArticleHow to import CleWin 2D file to 3D Comsol
I have my design prepared in CleWin software. Directly constructing the geometry in Comsol in 3D is very difficult. So can anyone help me to import the CleWin file and convert it to 3D in comsol?...
View ArticleTracking point Lissajous
Hi, For a school project I have to do some simulations with piezo materials and exciting mechanical microstructures with these piezo. Now it would be nice if I could track one point of the mechanical...
View ArticlePML in 3D RF module COMSOL 3.5a
Dear all, I have a question about PML in 3D RF module. Attached model is to simulate a plane wave propagating in air along z direction. As you can see, there is a huge distortion between the fields in...
View Articlewhich model should I use?
Hi folks, I am needing your advice so badly. I am trying to model a inverted cup (bottom up, open down） submerged in water, there is still some air in the cup gathered at the bottom of the cup...
View ArticleStrain Energies of a Shell from Eigenvalue solution
Hi everybody, I'm pretty new at this COMSOL thing, so I could use any advise you can give me on the following problem: I'm trying to calculate the ratio of strain energy stored in a thin film on the...
View ArticleGeometry modification changes model behavior
I have a relatively complex model that is 14mm by 10 cm by 10 cm. It's a simulation of an evaporator for a heat pipe and features some inflow and outflow ports for the working fluid, water. One of the...
View ArticleExporting Comsol data to Matlab?
Hello everybody, I want to postprocess Comsol data in Matlab. Since Ascii files blow up in size and I get "out of memory error", I'm looking for some other way. I've no experience with Comsol-Matlab...
View ArticleWhat should I do 3 phase Generator 2D in Model library
Hi, This example is the single phase Gen. If the single phase Gen can be three phase Gen, How to improve or apply it Vi=NN * L (integration(Ez.dA)) / A This eq from And the Eq can be use with three...
View Articlesolver sequence?
Hi there, I have question about solver sequencing. In the structural mechanics module, I have a structure under some static forces. These forces generate some displacements in the structure but then i...
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