FSI and Damped Eigenfrequency Analysis (Comsol v4.0a)
Hi to all, I'm trying to solve some FSI models which correctly ran with version 3.5a. The models calculated the eigenfrequencies of a solid structure vibrating in a fluid environment. Thanks to the...
View ArticlePoisson-continuity coupled equation
Hello, I try to model the corona discharge in wire-cylinder geometry governed by the equations: nabla (V) =- rho/epsilon0 (Poisson equation) and grad (rho) * grad (V) = rho ^ 2/epsilon0 (equation of...
View ArticleMixing two different fluids in fluid flow
Hi I have been working on a flow analyzer that has two inlet and an outlet. I have two fluids, one is very dense and the other is a very dilute substance, both of them are completely different and they...
View ArticleSimulation of an hydraulic accumulator for pulsation reducing
Hello COMSOL community, I am trying to do a transient simulation of an accumulator in a hydraulic circuit. For simplification, the accumulator shall be placed as a bubble of a second fluid domain...
View ArticleGeneral Projection Bulk Temperature Example & Question
Dear all, The following model may prove useful to somebody (other than myself) who wishes to calculate the average of some scalar value as a function of axial distance. In this case it's the bulk fluid...
View ArticleWhat does phase mean in a stationary solver?
Does phase have any meaning when using a stationary solver? I have a study node with two steps: a time-harmonic step (frequency domain) followed by a stationary step. When looking at plots of the...
View Articletutorial "Scatter on Substrate"
Dear all, Is it possible to practice the tutorial "Scatter on Substrate" on version 4.3?www.comsol.com/showroom/documentation/model/14443/ I want to simulate the transmission through the metal...
View ArticlePlasma nitrogen
Hello. Does anyone have data for the simulation of plasma ICP for nitrogen? Thank you.
View ArticleHELP NEEDED fluid mixing.
Hi I have been working on a flow micromixer that has two inlet and an outlet. I have two fluids, one is very dense and the other is a very dilute substance, both of them are completely different and...
View ArticleHow to make COMSOL spread out mesh nodes more evenly?
Hi there, I'm using a COMSOL model (see attached mph-file) via LiveLink in MATLAB where I especially need to reconstruct certain values throughout the whole domain (in the context of...
View ArticleMoving mesh example
Hi, Is there any example of using moving mesh with a pdf guideline? I need to model a moving magnet next to a coil and calculate the induced voltage!
View Articlemoving user defined material library
Hi, How to move user defined material library from comsol 4.2a to comsol 4.3a? Regards, Susant
View ArticleEigenfrequency study with FSI interface in 4.3a
I attempted to use the FSI interface with the eigenfrequency study step using its default configuration under 'custom studies' in the model wizard. The study step indicates a warning, however, so I...
View ArticleMagnetic-structural coupled analysis, result not good
This is part of my thesis. I'm trying to simulate the magneto-structural coupled analysis on a magnetic gear. The attached file is a picture of my result. The cylinder consists of permanent magnets and...
View ArticleFinite Elements for Fluids P1+P1 P2+P1
Dear Comsol users, Comsol sets P1+P1 elements as default for laminar flow described by Navier-Stokes equations. As far as I know, theoretically, these elements are not good for such equations. Instead,...
View ArticleDependent variable as a function of coordinates
Hello I've solved 2D PDE problem and I've got distribution field of the dependent variable (_u_). Now I need global function that should use solution _u_ as a function of coordinates. I can't...
View Articlemodel eye and its saccades
Hi, I'm trying to model the eye and have it oscillate about it's axis with an angular velocity. However, when I use moving mesh to create movement, I can't seem to get it to rotate about it's axis (the...
View ArticleCluster-Computing with Comsol
Hi! Im am trying to configure Comsol 4.1 for parallel computing on a number of nodes (currently 3) on a Scientific Linux System using PBS. I found out i had to set up a mp-daemon on each of the nodes...
View ArticleConstrains and laminates
Hello, id like to simulate a laminate with around 5 isotropic laminated layers. These layers are in the form of a plate with a constant area load. The model is a laminate for photovoltaics with area...
View ArticleHeat Transfer
Actually, I need to give boundary condition to one of the part of my system. At that part, I will use cryocooler of capacity 1 W at 4.2 K, how can I give this boundary condition to particular part. My...
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