Surface recombination of Si solar cell simulation
HelloI am working on Si solar cell simulation to get the J-V curve, meanwhile I am thinking to take into accout the surface recombination of the cell. However, the interface of the junctions alway...
View ArticleScattering Vs Impedance Boundary Condition for Plane Wave
Hello,I am simulating a plane wave with COMSOL 4.4. I noticed that when I use the scattering boundary condition I get a higher electric field (by a factor of 2) than when I use the impedance boundary...
View ArticleFull Field, Scattered Field, and Background Electric Field.
Hello,I need to simulate the scattered field from a plane wave interacting with some metal plates. However, when I input the excitation as background electric field, the electric field goes through the...
View ArticlePlane Wave
Does anyone know why there is a difference of 2 between the solution of a simple plane wave when I use scattering boundary condition and when I use impedance boundary condition. The scattering boundary...
View Articledeformed porous media
A porous media consists of solid matrix and liquid water. There is no mass transfer, however, the average concentration of liquid water keep a constant when the porous media expand under heat, which...
View ArticleDamped Eigenfrequency Analysis
I am working mode test from eigenfrequecny analysis using Solid mechanics. My problem is when I add damping in the form of isotropic loss factor to thr linear elastic material, it would increase the...
View ArticleHow to simulate a laminar premixed flame burner (McKenna Type) on Comsol?
I'm trying to simulate a laminar premixed flame burner on Comsol (McKenna Type), including fluid-flow, heat transfer, combustion reactions and, eventually, soot formation? Can you help me?
View ArticleFailed to calculate variable
Hello,everyone! A series of errors occurred during the research during the modeling process，when I prepare to start calculate. According to the above tips, I cannot find the variables in the...
View ArticleTime Dependent Solver for Free Molecular Flow
Good morning,I am new to this program, still trying to learn. My current goal is to model a pore with a single opening and see the time evolution of profiles of a free molecular flow.I have found an...
View ArticleFalling ball sound
Hi all, I'm trying to simulate a sphere (steel) falling on a base (concrete) and I'm interested to study the sound produced by the impact. I'm working with multiphysics: solid mechanics and sound...
View ArticleEvaluation of component coupling operators
Hello, If I define a component coupling operator, such as an integration operator over a volume, after a simulation study has been completed, the operator can not be used yet in the post-processing of...
View Articleprevent displacement in specefic directions
Hi all, I have a model and I have a question about it. On the surface of the geometry I d like to only have the deformation in the positive X direction and skip the one in the negative direction. I...
View ArticleIll conditioned preconditioner and increase the estimate factor.
The below post is related to an archived discussionTry changing the preconditioner factor in iteration section of the solver configuration where this warning or error has occured. One can try...
View ArticleCOMSOL can't model hypersonic flow (M>4)?
I tried to model a hypersonic (M=8) problem in COMSOL - a blunted wedge. I started to get probelms with a low stagnation velocity and results that strongly disagreed with other CFD codes. I was...
View ArticleDifference of 2 between impedance and scattering BC
Hello,Does anybody know why there is a difference of 2 between an excitation with an impedance boundary condition compared to an excitation using scattering boundary condition. The scattering BC gives...
View ArticleFull Field Formulation
Hello,When I use the full field solution in comsol for a two-mediums (Air/other_material) problem, I get oscillations in the magnitude of the electric field in air, which tells me that the plotted...
View ArticleAssigning permittivity dependent frequency
Hello. I am a new user of comsol multiphysics and I kindly want someone to help me concerning the below problem:I am trying to create a new(user defined ) material based on generated complex...
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Visualization of radiation pattern on geometry
Hello,Does anyone know how I can plot the radiation pattern of an antenna in combination with the geometry? The picture better explains what I mean...
View Articlevoid equations for Lagrange multiplier
Hello everyone, I am simulating with semiconductor interface and I am trying to specify a boundary condition using weak contribution. In fat, I am trying to connect an electric potential that I have...
View ArticleSimulation on Faraday rotation
Hello every one. It's Siyuan.I was trying to simulate the Faray rotation, using linearly polarized input light and asymmetric permitivity tensor with non-digonal components... However, there is always...
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