Rotating generator with bad inducted voltage
Hi everyone. I am using an old version of Comsol, the 3.5 ! I am trying to simulate a generator with 32 poles and with permanent magnets of NdFeB. Because of this and because i want to simulate it with...
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 ArticleParameter Estimations by Inverse Analysis using Comsol 4.2.
Dear Sirs, I would like to have an opinion by more expert users than me. I am facing a problem of parameter estimation by inverse analysis for structural mechanics. More simply, I have to estimate the...
View Articlepoint source in RF model
Hello, I met with a problem that when I add a point source, for example,electric dipole or magnetic dipole, in 2d structure, the point source can only excited in a limited small range, although the...
View Articlesolving forward and backward time dependant problems in comsol
How do I solve a simultaneous forward and backward model in comsol for a time dependant optimal control problem?
View ArticleImport time and space dependent file
Hi, I have simulated a 3D laminar flow model and export the cut plane velocity profile as section wise csv file. This velocity profile is space and time dependent. In a separate model, I want to...
View ArticleMeshing Errors In Small Solenoid Simulation
I am having trouble meshing a somewhat simple solenoid in COMSOL, more specifically, solenoids with a small pitch. I have attached a simple solenoid simulation (created in 4.2) which demonstrates the...
View Articlegetting isoparametric elements
I am doing a joule heating analysis for a fairly thin 3D object. Generating simple quads on one surface and then sweeping them to get brick elements give bad results. From my own experience...
View ArticleFlexera lmadmin with COMSOL
Hello, I am attempting to serve my COMSOL FNL license using Flexera's new lmadmin tool, instead of the old lmgrd daemon that ships with the COMSOL installer. It seems to work, but I have run in to the...
View ArticleHow does COMSOL avoid Checkerboard solutions?
Hi I am a Master student, which have started to use COMSOL for my Master Thesis. I am wondering how COMSOL avoid checkerboard solutions of the pressure field, when it solves the Navier Stokes equation....
View ArticleSimulation of balloon gore deformation under inflation.
Hello, Im doing analysis on the shaping of balloon gores cut from a polyethlyene/polyester laminate. The shape of the inflated balloon is used as an optical reflector and is therefore crucial to the...
View ArticleModelUtil.connect(solverHost, solverPort);
Hi everyone, I try to compair the results of two solvers running in parallel on two different comsol-servers. Therefor I try to establish a link from my Java-API to two comsol server. But only one...
View ArticleCreate a 1D line Plot of a 3d surface
Hello, I'am trying to do a simple simulation with a 3d hollow half sphere that is heated on the inner surface. The heating leads to a displacement which i want visualise in a 1d line plot. The plot...
View ArticleCurrent in Induction heating (Peak or RMS)?
Hello, When solving using the Induction Heating solver, can anybody confirm if the "Current Excitation" in the "Coil Group Domain" is peak or RMS? I have a suspicion that the value to be specified is...
View ArticleModeling Acoustic Metamaterial
Hi, I want to model an 2D acoustic metamaterial in Comsol. My target is to apply acoustic waves along one side of the geometry and calculate the wave amplitude from opposite face of the geometry. I...
View ArticleThree phase modeling
Hi there, I have a problem with coupling single phase and two phase flow (phase field) physics. I would like to model ice nucleation inside a water droplet. This droplet, however, is inside a laminar...
View ArticleWhat would be your ideal COMSOL workstation?
Hello all, I am in the process of building my own COMSOL workstation, and am looking for advice. If you were building your own computer from scratch, what parts would you be sure to get (besides a...
View ArticleMemory problems with mphinterp
I have a large RF simulation, and I need to get the value of the electric field on a rather dense rectilinear grid. For this, I have been using mphinterp. However, I have been running into the problem...
View ArticleHow to export data in excel format?
Hey Ivar, I want to export my figure into excel format. and replot it in matlab. Is it possible ? Thank you very much!! Baofeng
View ArticleSaving probe tables in a parametric study
Hi, I am using several probes to plot and also write the data to a table during solving. With the new version, since we have the option to save the table in the model and as a separate file as well, I...
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