electric mode field for listener ports in wave optics module
Hi ,In wave optics module(COMSOL 5.2a.) I want to define a 6-port domain . (lambda = 500[nm])I want to excite port#1 and read the powers arrive to another ports.so , I define ports on wall of the Block...
View ArticleImplement MATLAB Command onto COMSOL 5.5
Hi All, I had everything ready in COMSOL(the boundary condtions, external forces and the geometries are all finished and assigned), while I would like to implement some commands used in MATLAB onto...
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Boundary conditions for triangular lattice
I am trying to simulate an infinite 2D triangular lattice in Comsol for phononic band structure but I am confused that how should I use periodic floquet boundary conditions on the unit-cell.A unit cell...
View Articleundefined variable comp1.D
The below post is related to an archived discussion[start here] "Undefined variable. - Variable: comp1.D" The default name for the diffusivity in the tds interface would be tds.D_cxx (or you could use...
View ArticleDiffusion model
Hi I am trying to model a simple diffusion equation using Fick's law in a square. The left BC is conc = 0 and the right BC is dc/dx =0. Can you please help me with the boundary condition. I need help...
View ArticleExample on a piezo sphere excited by an acoustic wav e
Hello, Is there an example of a piezo sphere (or any shape) excited by an acoustic wave?.I have seen examples of piezo generating acoustic wave after having a potential difference applied (e.g. tonpilz...
View Article- Couple Studies from Different Components
Hi!I want to use the output from one study to compute the phyiscs in my second study. The two physics I am using are 'semiconductor physics' and 'solid mechanics'. These two physics are being run on...
View ArticleProblem in updating probe value in time dependent study
Hi I'm trying to simulate a disk which has two parts, a rotator and stator. there are two electrodes on stator, and voltage between these electrodes changes when rotator moves. I rotate the rotator...
View ArticleWay to input power to single turn coil
Hello, guys. Maybe, my English is poor. If so, I'm sorry.I have a problem regarding the simulation of flat spiral coil. And I want to measure the voltage from induction at two ends of coil. The physics...
View ArticleCOMSOL Help (new user)
Hello,I am a new user of the COMSOL software, and I was wondering if you guys can orientate me on how to best simulate the heat transfer of air in a closed incubator, which also has a fan located...
View ArticleRotating-Wave Electromagnetic
hi would I like to know if there is an example simulated a Rotating-Wave Electromagnetic?Thank you.
View ArticleHeat Transfer in Pipe Flow
Hi all!COMSOL newbie here haha. I am trying to model the flow of compressed hydrogen through a cold pipe, and essentially, I want to see how much the temperature of the hydrogen will cool down as it...
View ArticleCoupling Two Phase Fluid Flow And Electrostatics Module?
Hi, I am trying to model the shape of a charged fluid-fluid interface in presence of an external electric field. It a 2d model, where the electric field is generated by a parallel plate capacitor type...
View ArticleMax/Min point and Maximum data set do not work properly
I have interpreted power system in the 2D axis coordinates and used max/min without doubt about this function.In this time analysis, the field was focused on the triple point when visually checked But...
View ArticleHow to evaluate overlap integrals between two eigenmodes?
Issue: I am calculating the eigenmodes of some electromagnetic structure. Afterwards, I want to evaluate an overlap integral between the fields of two different eigenmodes over some domain within the...
View ArticleBubble radius decreases over time
Hi,I am simulating a bubble rising problem using Moving mesh method. I have a problem and I do appreciate your help. The problem is here that the bubble rises in water normally due to gravity, but the...
View ArticleTransmission/Reflection on Ports
Hello,i had some weird results when simulating the transmission and reflection of metal nanostructures on glas, using and in and out port. For testing purposes i created a simple 2d file with a single...
View Articlelumped port problem in aluminum log-periodic antenna
Dear Sir/Madame,I am new to Comsol Multiphysics and I am having difficulties with the lumped port/element boundaries from the Electromagnetic Waves, Frequency Domain physics section. I recreated the...
View ArticleVacuum pump condition
Dear all, I have a question about a model I am creating (attached): I have a pump connected to a large oven. In this oven there is a cylindrical chamber containing water that dries. This chamber is...
View ArticleInteraction between depletion area and fixed doped layer
Hello all,I am trying to model a semiconductor device that has a bottom ground contact and a doped active area with a contact, surrounded by an isolated doped region. The model converges nicely at zero...
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