how to avoid reflection of TE wave in 2D in 4.4?
Hi, I am working on a rectangular structure, where I've created a PML boundary condition on all the four sides of the rectangle by creating a layer on its all sides. Also, inside it I've created a...
View Articlesweep + Values of variables not solved for
I have a model which consists of two studies: - Study 1 : Stationary with parametric sweep of parameter A - Study 2 : Eigenmode, with parametric sweep of A, the result of Study 1 is the input for Study...
View ArticleSimulating S and P Polarised EM Waves
I am trying to simulate a plane wave with either S or P polarisation incident upon a nanoparticle on a substrate at various angle of incidence (phi and theta). Following the Scatterer on a Substrate...
View ArticleLumped Capacitor in the RF Module, eigenfrequency
Hello all, I'm using 4.4, and I realize it is impossible to add Lumped Capacitor and Lumped Inductor in RF Module Eigenfrequency study. (but lumped elements with Z value is possible, and Lumped...
View ArticleSuperconductor in RF module
Hi all, Is there a simple way to define a superconductor material and directly assign it to a boundary in emw simulations? I saw some papers using PEC instead of a real superconductor but I'm not sure...
View ArticlePlasmonic Wire Grating Not Working
I followed the steps in the plasmonic wire grating tutorial for COMSOL 4.2. When I try to compute the results it says it has encountered a problem with stationary solver 1(sol1/s1) and Failed to...
View Articlefrequency domain study of a heat transfer model
Hi everyone. I am new to comsol, it would be appreciated if someone helps me. I want a frequency domain study analysis of a heat transfer model. Is there an easy way in comsol to do this.? Basically I...
View Article"error: solnum out of range" RF module, mode analysis
Hi, I am doing a mode analysis for a plasmonic waveguide, now, when i am trying to open the file, the whole loading process of opening the model is done, then a message appears that tell me that...
View ArticleConvergence problem in time dependent solver
Hi, I'm getting this error when running a time dependent simulation of laminar flow in a micro channel. What I want to do is change the input flow on one arm of a y-channel and follow the response in...
View ArticleNegative transmittance in comsol
Hello everyone I am simulating a model for periodic silver sphere for in-plane and out-plane polarization. But when i am plotting the transmittance in case of in-polarization with angle of incident 50...
View ArticleSlit conditions error
Hi Everyone. I am working on Dielectric Resonator Antenna in Comsol 4.4. When I complete my design and try to compute, it always has an error. "The slit condition should be applied only on an interior...
View ArticleConvergence problem in time dependent solver
Hi, I'm getting this error when running a time dependent simulation of laminar flow in a micro channel. What I want to do is change the input flow on one arm of a y-channel and follow the response in...
View ArticlePlasmonic Wire Grating Not Working
I followed the steps in the plasmonic wire grating tutorial for COMSOL 4.2. When I try to compute the results it says it has encountered a problem with stationary solver 1(sol1/s1) and Failed to...
View Articlesweep + Values of variables not solved for
I have a model which consists of two studies: - Study 1 : Stationary with parametric sweep of parameter A - Study 2 : Eigenmode, with parametric sweep of A, the result of Study 1 is the input for Study...
View ArticleHow to draw a periodic waveguide?
Hi all, I have a simple question towards for geometry for which I didn't a lot of search but still confused. So how do you draw a periodic waveguide that has a simple mathematical expression in 3D? For...
View ArticleIs there a variable Ex in Electromagnetic Waves module?
Dear all, By the question in the title, I mean a variable named exactly as Ex, without emw. prefix. Is it an internal variable? I input such a variable by mistake in a model. COMSOL didn't report an...
View ArticleImpedance in RF module & Transmission Line module
Hi ! I am currently on a project. I am trying to model human liver and the reaction of tissues due to the heat. There are models already set up in COMSOL. They are called "tumor_ablation" and...
View ArticleModeling of resonant absorbtion
Hello, I am wondering if it is possible for COMSOL to model the resonant absorption of protons in a static magnetic field. For example, if I had a 1T field along the Z-axis with a water phantom inside,...
View ArticleHow to set up the port?
Dear all, I use RF module constructing 2 models, which have same structures except the length. The input power and other parameters are also the same. But after simulation, the power at the incident...
View Articlemicrofluidic + external force field (optical force)
Hi, everybody I am a new user and just learned the tutorial of particle separation in microfluidics (www.comsol.com/model/red-blood-cell-separation-17013). I am working on a problems that how the...
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