Torque through Maxwell Stress Tensor
Dear all: Recently I tried to implement a similar problem to the one presented in the following poster. The goal is to obtain the force and the torque over a particle that is illuminated by an...
View ArticleNeed to simulate very thin layer with permittivity and permeability tensors
I am simulating an antenna structure in the RF module. Unfortunately, due to 3 dimensions of variability, no 2D models are suitable. Therefore, I am using a 3D solver. I have an impedance sheet...
View ArticleDifferent geometry dimensions of the same entity in a two-component model
I am modeling influence of heat transfer on the optical properties of photonic structures. While the initial task of heat transfer is performed in 3D geometry, the properties of interest is studied in...
View Articlegive a parameter varying spatially over the whole geometry
I am solving a electromagnetic scattering by a subsurface obstacle problem. How can I give a parameter varying spatially over the whole geometry? In my case I have to give permittivity. Then I have to...
View ArticleCan we start an open source materials library database?
I don't know if it is "allowed" but wouldn't it be nice if we could all share material properties with each other? It just feels so stupid that I spend time on entering the wavelength dependent...
View ArticleRF Coils
Whether do the RF coils have distributing capacitance or not in the simulation?
View ArticlePhase of a far-field calculation?
COMSOL'ers: When applying Fraunhofer approximations to field calculations (asymptotic analysis), we ignore small changes in amplitude from the source plane to the observation plane, but we do not...
View Articlegetting errors
i downloaded file from comsol.com and follow the every step given in it to build a program. As i try to run program. it is giving following errors Failed to evaluate variable Jacobian. - Variable:...
View ArticleMetamaterial
When i use comsol to build a model of Metamaterial , i dont know how to define the boundary conditions? Can someone help me ? Thanks
View ArticleDifferent geometry of mesh would affect the value of E field
Hello, I simulated the EM wave propagating in the air medium recently. And I found a strange phenomenon that the different geometry of mesh may affect the value of electrical field. In my model, the EM...
View ArticleIdentify PML in electromagnetic wave time domain (teew)
Hi all Does anybody knows how to set perfectly matched layer (PML) in boundary condition in electromagnetic wave time domain (teew)
View ArticleRF-transient governing equation
Hi, I'm working with RF-transient module and tried to deduce the governing equation used by COMSOL (wave equation of the magnetic vector potential). I came to a similar equation, however on the right...
View ArticleRF module - photonic structure adsorbance question
Dear all, I am trying to run a simulation to compliment my experimental results. However, I could use some help in getting my simulation results to make sense. If you look at the picture attached, I...
View ArticleDC discharge modelling query
Hello I am modelling a DC discharge in between 2 electrodes which are positioned asymmetrically. I am making use of the example model in comsol library (positive column-2d). Both models are attached in...
View ArticleHow do I retrieve cross- and co-polarization T/R data from heterogeneous...
COMSOL'ers: I have a complex periodic array structure (dipole on substrate on ground plane) illuminated by an oblique plane wave. If I were to define an incidence plane (say x-z plane) and launch a TM...
View ArticleRandom activation of elements in comsol
I have a 2D optical system with 3x3 circles. I would like to randomly activate or deactivate the the presence of the particles. Is it possible to do it?
View ArticleHow to simulate the propagation of particular mode in a waveguide
Hello. I have rectangular metallic stripe embedded in homogeneous dielectric as a plasmonic waveguide. I have performed a mode analysis for this waveguide at particular frequency (the wavelength is...
View ArticleNeed of applying scattering boundary condition in comsol
Hi Mr.Ivar, i am new with Comsol and using 4.3b version.I have a silly question.please,tell me what is need of applying scattering boundary condition in software..actually,for which purpose it is being...
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