Meshing of boundary layers wont work
I am trying to mesh (and, eventually, compute) a model of a rectangular duct connected to a circular hole, where the duct and the lower part of the hole are filled with water, the upper part of the...
View ArticleMeshing issues - boundary layers
I am trying to model fluid flow up through the inner lumen of a tube, then laterally through pores in the tube wall, and then up through a ring-like channel boardered by said inner tube and another...
View Article2D cut slice of mesh
I am wondering if it is possible to obtain a 2D image (slice or cut) of the mesh elements at a specified location is a 3D model.
View Article"Internal error in boundary respecting." and "Out of memory during assembly."
Dear All I have two errors in my microfluidic models about "Internal error in boundary respecting." and "Out of memory during assembly.". At first I tried to simulate the flow of the overall 3D...
View ArticleJoules heating.
Hello. I have made a model of Primary terminal of a Transformer carrying a current of 300 A . I wanted to find out the heating in the Top chamber of the transformer where the terminal is connected....
View ArticleNatural Convection with buoyancy force in air box
Hello Yoav, I am struggling on modeling natural convection in a air box and I saw that you gave the most detailed helpful answer to this type of problem on COMSOL discussion Forum. I will be so...
View ArticleProblems with boundary layer meshing
I am trying to mesh a k-epsilon model and cannot generate a boundary layer mesh. My model has a very narrow region and I expect that that is the problem area. The error I get most often is: Could not...
View ArticleTaylor Hood or Crouzeix -Raviart element
Hello all I am using COMSOL for solving the velocity and concentration field. I am using quadratic elements. But I don't know what kind of quadratic elements COMSOL uses. Is it a Taylor Hood or...
View ArticleModeling rigid components
Hello, I am working on a contact model where one object is much stiffer than the other. In other modeling programs I have used it is possible to assume the very stiff surface is infinitely rigid...
View ArticleMoving Object
Dear Jean-Paul, I wolud like to have a look to your simulation "ACO 2xMOV OBJ 1xSliding along W Auto-Remesh 2013-05-30NS" but I can´t open it, because I don´t have the "pressure acoustics, Transient...
View ArticleMeshing a MEMS chip
Hello guys I'm trying to mesh a MEMS chip, which is a Pt Temperature sensor. There is a Si wafer, thermal oxide, patterning Pt and deposit PECVD oxide. When there is no PECVD oxide, I could mesh this...
View ArticleError message: Maximum newtonian iterations reached.
Hi all, Did anyone know how to solve this error message? Thanks Alex Lee
View ArticleMeshing Thin Films
Hi! I have two blocks to mesh, one into each other, in a 3D environment. The smaller one (inside) is the thin film: width = 100 µm depth = 9 µm height = 20 nm The bigger one (outside) is: width = 200...
View ArticleEncountering error during meshing
when I try to run a mesh i encounter the following error message: "Edge is much shorter than the specified minimum element size." I do not know what this means and any advice on how to get rid of this...
View ArticleLight Propagation in Tissue
i just want to simulate the propagation of monochromatic light (800nm) in a 3 Layer tissue model 3D. Does anyone know a working Comsol solution? Problem: to many elements with this wavelength. Setup: 3...
View ArticleMoving mesh problem with two concentric circles (Li-ion)
Hello, I am using Comsol Multiphysics 3.5a. I am modeling a problem involving three models, Solid Stress-Strain (including thermal expansion), PDE General Form and Moving Mesh (ALE). My geometry (2D)...
View ArticleMeshing of Fluid structure interaction in a blood vessel
hi all, I am doing a FSI steady state analysis of blood vessel, the fluid domain surrounds by 4 layers (solid domains). the thickness of fluid domain is in millimeters but solid domains have diameters...
View ArticleMeshing around a random surface
Hello, I am modeling diffuse joining using phase field method (entered as coefficient form PDE) in COMSOL. My domain is a parallelogram twice cut across with random surfaces. Each surface is generated...
View ArticleAcoutics Module
I am trying to model a sound source (speaker, just a "power point source" now) in a sphere and prove that the sound is concetrated in the center of the sphere. Then I want to add sound treatment to the...
View ArticleStrange Mesh Behaviour when coupling Laminar Flow and Moving Mesh (ALE)
Hi all, I want to simulate the convergence of tectonic plates and the resulting uplift of material at the plate boundary. The model is set up as follows: The left side and the left half of the bottom...
View Article