Toroidal inductor
Hi,I'd like to wrap a certain design for something that behaves like an inductor in another toroidal inductor with a rectangular cross section. It would be nice to use an axisymmetric geometry to do...
View ArticleThin Film BAW Composite Resonator in 2-D
Hey,Can anyone help me with my model. I am a beginner to COMSOL. For some reason I am not able to figure out the boundary selection of the device since I am trying to perfom a frequency domain analysis...
View ArticleDoes anyone know what element ratio means?
This is probably an easy question to answer. I am new to COMSOL. I was looking at 1D DC Glow Discharge tutorial that the COMSOL website had for the plasma module. On page 14 (Mesh 1/Distribution 1/Step...
View Articlemoving friction in comsol 5.2 (Solid mechanics)
Hello everyone, I am trying to simulate friction problem. the model is very simple. when i make contact of moving domain it shows no effect on model. the external force is applied using boundary load,...
View ArticleUltrasonic cavitation
Hi !!!! I am interested in modelling ultrasonic cavitation using COMSOL. The main objective is to model the pressure distribution in a liquid metal due to ultrasonic vibration through a horm immersed...
View ArticleCan not find multiphysics
Hey, I have free and porous domain, and a gas mixture. Hence I need to connect flow with transport concentrated specious. But, for my porous domain, I am using free and porous domain flow physics. I...
View ArticleDetermine Rate of Species Consumption in Electrode
Hi I am new to COMSOL and am using version 5.2. I am using the free and porous media flow and a transport of diluted species equations to solve my model. I want to know how to calculate the rate at...
View ArticleEvents interface - steps taken by solver
Hi,I successfully implemented this example: https://br.comsol.com/blogs/implementing-a-thermostat-with-the-events-interface/ However, for my purposes, I just want that the HeaterState verify my...
View ArticleChallenge in initialization of hole in 3d
I want to initialize a hole in three-dimensional, that is, an hemispherical hole as in "my goal.jpg". But the result I am getting is not what I am expecting, even though my equation is correct...
View ArticleDispersive Medium With Infinite Interface Created Using Periodic Boundary...
I am using COMSOL v5.3a to simulate an infinite interface between an air dielectric and a dispersive medium using a periodic boundary along x in 2D. I defined a rectangle, with a horizontal centerline...
View ArticleModeling assembly process
Hi all,I'd like to simulate an assembly process (soldering) in microelectronics packaging which follows these steps:1) A substrate and a metal lid are separately heated to temperature T1 2) The...
View ArticleDensification using COMSOL
Hello!I need help in changing the non-linear solid mechanics equation using the user-defined section. I checked other models in the non-linear node (e.g. Ramberg-Osgood, Power law, uni-axial data), but...
View ArticleHow to set a maximum temperature
Hey! I have a model with a heat source heating up a cylindrical workpiece. I also considered the energy necceserary to change from solid to melted and from melted to evaporated material. Some parts of...
View ArticleMatlab LiveLink
Hi guys... I am physics student and really begginer at comsol. I need to provide post processing by matlab livelink . when I try to open my comsol prj at matlab , I see a message which says I can just...
View ArticleUser defined function in post-processing (5.3)
Sorry if this has already been asked. I did try and search for this but couldn't find anything which is strange because it seems like a really obvious problem.I have a working model of a thermal...
View ArticleAbout Transport of diluted species
Dear Community,I am using COMSOL Multiphisics to simulate ISFET. When I do as the tutorial tells and want to reproduce it, I got this problem.In Add Physics, under transport of diluted species (tds),...
View ArticleLow values for reaction order
Hi,I'm quite new to Comsol, so please excuse me if I'm asking something trivial.I'm trying to generate a simple reactor model where DME reacts to different Hydrocarbons. But I'm only interested in the...
View ArticleValue of eigenvalue linearization point
Hi All,what does the Value of eigenvalue linearization point mean in the solver configuration setting?Thanks
View ArticleTime stepping taking too long
Hi All,My simulation times have been taking a lot longer recently, I'd like to learn how to reduc this. Can someone give me some advice about good practices to keep simulation times down, or refer me...
View ArticleMode analysis of a rectangular dielectric waveguide
Hi,I am currently doing a 'Mode analysis' study of a anisotropic dielectric rectangular waveguide (the cladding is air, the core is GaSe and boudary condition: PEC). I have two dispersion curves for...
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