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Trying to add LASER radiation source to a 3D model
Hello, i have a 3D model of the human eye, i'm trying to add a LASER source and to examine the heating distribution, i added materials for each domain such as absorption and scattering coefficients,...
View ArticleSolver for multiphysics problem: Solid Mechanics (compression) and Magnetic...
I have a problem that involves the Solid Mechanics and Magnetic Fields, No currents Module. Basically, I am compressing a part and want to study the magnetic field on the surface of the deformed mesh....
View ArticleSampling rate
When I generated a report of the waveform obtained bt the probe, the simulation report had 2070 sample points. The simulation was time dependant study with parameters[0,50,2000]. How can I find the...
View ArticleHalf ring magnet diametrically magnetization simulation issue
Hello all,Currently I am working on half ring magnet with diametrically magnetization simulation, the magnetization is attached as below.However, I have the problem to magnetize the magnet to get the...
View ArticleThe convergence problems for Au electrostatically actuated cantilever
Hi all!I followed the same procedure as Si polycrystalline actuated cantilever in application example and alternate Si by Au. However , I got this massage "Failed to find a solution for all parameters,...
View ArticleHollow core fiber design
The below post is related to an archived discussion[start here] though I have designed and succesfully simulated solid core PCF, I am beginner to design a hollow core PCF. So, please help me how I can...
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Thermal Diffusion Term in Equation of Semiconductor Material Model Node
Hello,I should preface this question by adding that I am a rather novice user of COMSOL.In the Semiconductor module, under Semiconductor Material Model, in the Equation drop-down menu, the electron and...
View Articlemodel crashed by Failed to evaluate temporary symbolic derivative variable
Hi there,I used the two coupled PDEs (one is for moisture flow and another one is heat transfer) to simulate water flow, heat transfer and phase change in the frozen soil. At the beginning, the...
View Articlesolver details
This is my report of a completed simulation. Can anyone help me find out what are these terms given in bold? Also how to arrive these valuesStep Time Stepsize Res Jac Sol Order Tfail NLfail0 0 out 3 3...
View ArticleTwo way FSI solver-- a piston push fluid through cylinders and small gaps
I want do a simulation in two way FSI, a piston pushing fluid through cyliners and small gaps. I have try to use different solvers of Time dependency. It is always the Error " Failed to find consistent...
View Articlesingualr matrix 3D -the 2D code works but not 3D!
HiI have a situation, I have a 2D code that works fine but when I extend the code to 3D it always has NAN or singualr matrix issue?!?!Its Navier stokes and PNP eqaution plus magnetic field, the problem...
View ArticlePhD candidate
I am trying to define a chiral material with the following constitutive relations: D =ϵE +iξB ,H =μ^(−1)B+iξE to generate OAM, However, I don't know how this material can be defined in COMSOL. While...
View Articletimeavg giving nonsensical values when visualizing results
I'm having difficulty displaying the plot that I want, and I believe part of it might come from a misunderstanding of how the timeavg() operator works. I simulated a time-dependent PDE on the surface...
View ArticleWhich module I should use to design the acoustic metasurface for low frequecy...
Which module I should use to design the acoustic metasurface for low frequecy applications?
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View ArticleNow Available - COMSOL Multiphysics® 5.4 – Faster solvers, new modeling...
Hello,I'm pleased to announce that COMSOL Multiphysics® 5.4 is now available. For details, visit: www.comsol.com/release/5.4Release highlights:COMSOL Compiler: For creating standalone executable...
View ArticleHelp with meshing
Hello, I am trying to replicate the results from a paper. I am having problems with the mesh. I have attached a photo with the geometry and a description for the mesh.
View ArticleRelative error exceeding tolerance in periodic structure
Hello,I am building a hexagonal periodic structure excited by an incident plane wave using the Comsol RF module, which I am attempting to simulate through a series of parametric sweeps. Unfortunately,...
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