Multigrid failure during solver
Hey all, I'm working on a 3D model of a microfluidic system using the laminar flow (spf) and transport of diluted species (chds) physics models. I've got everything modeled with all the physics...
View Articlefailure to find solution in newer version of COMSOL
Hi, I am a student with very minimal experience with COMSOL (most of what I know, I have learned just from experimenting with the program). I am modeling fluid flow through a flow chamber (see attached...
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 ArticleALE question
Hi, I'm interested in the transient effects of a moving charged object on a grounded one (see image). I have first modelled this using a parametric sweep on the object's x position. But of course, this...
View Article3D Symmetry of Model
Good afternoon all, I am modelling two electrodes (tips facing each other) and the electric field between them. There are two Z-axis layers to each of the electrodes, measured in nanometers, whereas...
View ArticlePlasmonic Biosensor
I need to make a Plasmonic Biosensor in Comsol. I don't know how to use the RF module. I'm good with the geometry but have no clue about the parameters, equations and boundary conditions. Kindly help...
View Articlemeshing curved surface
I have a curved surfaces in one of model. The radious is 4mm and full length of the model is 1.5..I have problem in meshing.. Can someone suggest what could be done?
View ArticleThe relative error (1.7e+005) is greater than the relative tolerance.
Dear Ivar I encountered some problem with my model, could you please have a look at it if you have time? Here are some details about my model: I am trying to model quench behaviour for a...
View Articlesystem requirement
I want to run 3D simulation of [CFD +MICROFLUIDICS] on COMSOL4.3a. To use COMSOL4.3a what should be system configuration? Please suggest.
View ArticleMesh problem
Dear all, I have got he problem during mesh, showing as Failed to generate mesh for domain; and Internal error bounday respecing. Can somebody help me to do this since I have checked and tried my model...
View ArticleElement discretization order
What is the default discretization order of the elements in COMSOL? And is there an option to increase or decrease this? Any comments on this are appreciated, I have tried reading through manuals but...
View ArticleMoving Mesh simulations of swelling (shrinking) circle and prescribing of...
Hello, I am currently running a boundary value simulation, using the general form PDE, which utilizes a moving mesh to account for a shrinking (or swelling, depending on Initial conditions and Boundary...
View ArticleSolving Pooisson/Laplace Equation for Multi-Electrode Array
Dear All, Iḿ trying to use Comsol to solve the laplace equation within a 3-D space. This 3D space is limitted by a block of 8000x8000x500um. The Top-Plane xy,500 should be at ground (V=0V). The...
View ArticleIgnore geometry boundaries for meshing
Hi all. I am new to comsol and have a problem I could not find a solution to in the manuals. I am using the Electrostatics package (in rotation symmetry 2D) to compute a potential (field) map. I used...
View ArticleDealing with large dependent variable gradients
I have a solid cylindrical domain( at 0 concentration initially) with a very very small concentration source term (~7E18 mol/m3.s) inside it. I am doing a transient simulation in which this...
View ArticleTurbulent Flow to Heat Cylindrical Vacuum Oven in 2D by Time-Dependent Study
Hello community, Here we are trying to simulate a cylindrical vacuum oven in 2D by using Conjugate Heat Transfer with k-epsilon Turbulent Flow. The oven is set as a rectangle with: one inlet, one...
View ArticleLog: Regenerating the face information....
Hi All, I am working on an acoustic-shell interaction problem. I do not create a mesh in Comsol. Instead, I import a Nastran file. Model loads, however the following msg is logged:"Regenerating the...
View Articletransformer model
Hi everyone, I am very new to COMSOL, thats why I ask for so basic things. I am going to do simply transformer model with radiation. Firstly I did the model in Inventor. But i have many errors during...
View ArticleDEFORMED MESH
i want to use both magnetostatics and transient moving mesh on a magnet. my geometry consists of 2 permanent magnet(fixed on either end), and a permanent magnet in the middle. i want to apply deformed...
View ArticleA SMALL DOUBT ON PORT POWER VALUE !
Hi all, I am new to this software and I am trying to simulate a multi-layer structure on which plane electromagnetic wave is allowed to fall at normal incidence. I kept the port power at the default...
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