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Help with mesh building for a simple 2D geometry

Hi,I was working on a model that couples the physics module Phase transport in porous media and Darcy's Law together. In Comsol Application Gallery, there's an example ' Wicking in a paper strip' where...

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How to calculate/export left eigenvectors within the eigenvalue solver?

Dear COMSOL users/employees,after quite some research, I still haven't found a way to calculate and export the left eigenvector to Matlab when performing an eigenvalue study in COMSOL.Some background...

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How do you couple the modules “Transport of Diluted Species and Transport of...

Hello, Thank you so much for reading my post.I have to domains that are separated for a thin region that will serve as a semi-permeable membrane. However, I want to specify in one of the domains...

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Frequency domain modal analysis for piezoelectric device coupled with...

Hi all,What I am trying to do is to build a piezoelectric device with electricalstatic and solid mechanics interface and I coupled it with an electrical circuit interface. In the study I want to do a...

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Problem with lower coil excitation frequency in Magnetic Field mf module

Dear All,I'm working on the eddy current sensor simulation with the different target material. According to my model, I cannot apply the coil excitation frequency lower than 20 kHz, for example, 1,000...

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Failed to find a solution. Maximum number of Newton iterations reached for...

Hi All,Thank you so much for taking the time to read this. I am currently encountering some issues with finding a solution for my simulation. For some background, I have a 2D simulation of an...

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How to solve the errors in the comsol log file?

Hi, everyone. I used the " Plane wave expansion" approach to set the tightly focused gaussian beam, but when I increased the wave vector count to 100, an error occurred and the log file showed...

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who know the ''ec.intWe'' means?

In AC/DC,in Electric Currents,in Frequency Domain,in Global Evaluation,what is the exactly expression of ''ec.intWe''?

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shear stress of ZnO and Cu thin films

can anyone please post the shear stress phenomenon when ZnO and Cu materials used as thin film platform? please respond asap.. thank you.

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Modelling Fluorescence Enhancement Near A Gold Nano-Particle

Hi ! Can anyone help me in modelling fluorescence enhancement near a gold nano-particle. I've tried a few times but couldn't succeed. Has anyone done it before?Please let me know if anyone has any clue...

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Double-layer charging on an electrode with an ion-exchange membrane.

Hello,Disclaimer: I am new to COMSOL, this is the first thing I am trying to model with the software.I am trying to model an electrode assembly to see what would happen when I place an ion-exchange...

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Add mass to end of cantilever beam

Hi, I want to get the natural frequency of a cantilever beam with one end fixed and the other end with a mass. I tried both adding a mass at the end of the beam, and applying a point load. Both...

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Port propagation constant in Comsol

Dear Friend,Hi ,I want to define a 6-port domain in COMSOL 5.2a. The domain contains 25 identical Rods.I want to excite port#1 and read the powers arrive to another ports.so , I define ports on wall of...

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Mirror surrounding by PMLs overrides Boundary Conditions

Hi,I am new to COMSOL. I am designing a mirror inside air and then surrounded by PMLs. Before I added the PMLs , I added the PMC/PECS and Impedance boundary conditions at the mirror and I was thinking...

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Contact adhesion convergence

I’m modeling ice deformation by dislocation creep with the base of the ice frozen to the rock beneath it. The ice deforms such that the right boundary (initially almost perpendicular to the base)...

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Mesh size decrease making time dependent model not converge for as long

I’m running a time dependent model of ice deformation. Generally, I've experienced smaller mesh sizes improving results. However, I’ve recently been encountering some situations where a finer mesh is...

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Simulataneously giving boundary load and body load

I want to give a boundary load and then a body load. More specifically, suppose I give initially a boundary load of 8N and then gave a body load for 10 secs. For this 10 sec I want to watch the...

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Tet vs quad Mesh?

I use the free tetrahedral meshing as it is the default. I read a comsol blog post basically saying that tetrahedral meshing is superior in enabling comsol to find a suitable mesh. I can't however find...

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Particle size distribution in Li battery single particle model

Hello, I want to add a particle size distribution to a negative electrode in Li battery single particle model. For that, a Weibull distribution should be defined within a PSD range. How could I do...

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Non-reciprocal transmission by spatiotemporal modulation of relative...

I am trying to reproduce the paper: Complete optical isolation through indirect interband photonic transitionsThe non-reciprocal transmission they have demonstrated in fdtd by their in house simulation...

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