High frequency EM scattering off an obstacle
I would like to compute the scattered wave off a PEC obstacle (such as a polyhedron or ellipsoid) by an incoming time harmonic plane EM wave. The wavelength is much smaller than the scale of the...
View ArticleCentrifugal Force
Hi, I would like to include centrifugal force in my COMSOL (version 4.3a) model of a curved channel with laminar flow containing small particles. Is it necessary for COMSOL to find the first and second...
View ArticlePositron trapping and release (charged particle tracing + electrostatics)....
I was wondering if someone could give any insight on what are the best solver settings for my problem, in terms of solving time vs accuracy. Currently I'm using Strict generalised alpha settings to be...
View ArticleFailed to evaluate variable- comp1.ht.Tinit
Hello, Please I am working at simulating a 3D solar panel in COMSOL 5.1. After successfully fixing the errors on the mesh and the physics have been added, I proceed to compute the study, and I got the...
View ArticleEddy_Currents_In_PM
Dear all COMSOL experts, I am simulating a Synchronous Surface Mounted Permanent Magnet Machine. My aim is to estimate the eddy currents within the permanent magnets placed on the rotor surface, since...
View ArticleMulti-turn coil into simple SPICE circuit
Hi, I have recently downloaded and played around with the COMSOL model "Inductor in an amplifier circuit" (www.comsol.no/model/inductor-in-an-amplifier-circuit-990). This worked well, but when adding...
View ArticleHow to continue particle tracing from a certain time point?
Dear all, I am now working on the simulation of particle tracing with fluid flow. I have finished the staionary fluid flow and time dependent particle tracing calculation and obtain the particle...
View ArticleParametric solver does not support parameters in geometry or mesh.
Hello guys, When I change the size of a geometry with a parameter, parametric don't work as I wish. And there is a warning:Parametric solver does not support parameters in geometry or mesh. is there...
View ArticleError: "Attempt to evaluate negative power of zero."
I'm building a model using the Reaching Flow in Porous Media in a 2D axis-symmetric component, and my goal is to remove some of the dilute species from the system as a function of concentration and...
View ArticleError Index:2, Size 2, Feature: Stationary Solver 1
Hi I have a Frequency Domain study looking at the dynamic response of an un-deformed structure immersed in water. I am using Solid Mechanics, Pressure Acoustics - Frequency Domain (acpr) and...
View ArticleSolving air-cups inner pressure and its inner air leakage with giving heavy...
Hello everyone I want to solving air-cups inner pressure and its inner air leakage with giving heavy weight in time dependent But i don't how to set air leakage with giving heavy weight on air-cups!!...
View ArticleHow to get a solution for EDL
Hi. I'm trying to solve the electric double layer structure using Nersnt-Planck eqn and Poisson eqn rather than Poisson-Boltzmann eqn. My domain is pallel plate of which height is nanometric, typically...
View ArticleCustom Linear Solver
Hi, I'm wondering whether it is possible to use custom linear solver for my model on comsol. For example, can I use my original solver implementation instead of MUMPS or PARDISO at Study ->Solver...
View ArticleWater Electrolysis through SOEC
Hello everybody, I'm trying to simulate water electrolysis in an SOEC. In my stationary model I use SIEC physic, two TCS respectively for cathode and anode and two FP in the same manner. In my model I...
View ArticleComsol Paralel Computing Problem !
I want to use Comsol Paralel computing with Windows HPC 2008 R2. There are five Nodes one of which is Head-Node (Windows SERVER HPC). Among the workstations one Head-Node + quantity of four Workstation...
View ArticleIn Segregated Step 1: There was an error message from the linear solver. The...
Hi all, Why does this error happen and how do I solve it? This is the log file: ============================================================ Minimum element quality: 0.03333...
View Article.lock file
I am trying to do a dynamic simulation using particle tracing module. However, at a certain time, COMSOL got frozen with creating .lock file. I don't think that there are any busy computation to cause...
View Articlestop condition error: stop condition fulfilled for initial values
I am trying to build a model of a 2D li-air battery based on the 1D li-air batt tutorial. I have made it most of the way through the model until I compute, and the error appears: stop condition...
View ArticleTIME to FREQUENCY FFT
Dear all, I am simulating pulse echo technique using ultrasound. I have my results in time domain. Now I need frequency spectrum of my time dependent study result. In study 1 "time dependent " time...
View ArticleNonlinear Dynamic Response of a Clamped-Clamped Euler-Bernoulli Beam
I am currently modelling the nonlinear time response of a clamped-clamped Euler-Bernoulli beam using the geometric nonlinearity tool in COMSOL. I intend on doing so for a wide frequency range in order...
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