What does outlet pressure boundary condition actually means?
What it seems to me is that when I set an outlet pressure boundary condition as 1 atm then it means that the pressure just outside my domain is 1 atm. Consider, for example, a deflating balloon. While...
View ArticleError: Complex numbers are not supported by the Auxiliary space Maxwell solver.
Hello everyone, I am using the COMSOL 5.2 AC/DC Module.I'm doing a (mf) simulation, so that the impact of a CET system to simulate on slab track in the rail traffic. The study is (frequency 50Hz)....
View Articlework out temperature inside material where is deposited on a waveguide
Dear All Very sorry to bother you regarding my comsol model. The structure of my device is shown in the attachment. I've deposited an absorptive material (the thickness of the film is around 30 nm) on...
View ArticlePN optical modulator
Hello, I am a student in TUD and I have started to work with COMSOL. My task is to model and simulate PN silicon optical modulator. I am using Semiconductor module. I have couple of questions I would...
View ArticleSolid Mechanics Eigenfrequency Analysis PML
Hello all! I was wondering if anyone has had any success with using a perfectly matched layer in an eigenfrequency analysis in the Solid Mechanics module. I'm modeling essentially a cylinder mounted on...
View ArticleCurrent density in 1D Li-air battery module
Hi all, I have a question about this model. This model is 1-dimension. However, the unit of current density is mA/cm2. I don't know how I can understand this current density. Also, how do I assume the...
View ArticleArmature displacement
Dear Friends, I want to simulate the armature displacement inside of coil. For this I created the geometry and put the the physics which are the magnetic Fields and domains ODE. The thing is, I didn't...
View ArticleQuestions about laser-tissue interaction
In laser photo-therapy, bandwith(FWHM, spectral with) is one of parameters of the laser light. I made a multilayered tissue model with pulsed laser irradiation, but I confused how to take into account...
View ArticleCalculate Electric Fields from Magnetic Fields Single-Turn Coil?
Hello all, This is my first post here. I'm relativly new to Comsol, but have been working with it for a couple months now. I've extensively used the Single-Turn Coil capability in MF, but am now...
View ArticleTorque 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 ArticleTopology Optimization for Eigenfrequency
I am attempting topology optimization on a resonant beam. I select the beam as the control variable field with minimum value 1e-9 and maximum value 1. I define E_SIMP as a variable used as the Young's...
View ArticleLiquid-Vapor interface drops very fast
Hi I have encountered a problem in COMSOL when using the “laminar two-phase flow, moving mesh” physic. A simple model indicating what I am trying to solve is provided in the attachment. As you can see...
View ArticleThermal Expansion Polycrystalline Silicon
Hello, I was trying to find a similar problem to mine but could not find it. I am trying to find the stress gradient of a poly crystalline thin film layer deposited on silica and single crystal...
View ArticleFermentation glucose
Hello, I try to modelise the glucose fermentation in a reactor. I followed a model I found in the website then adapted it to my case. I succeed to have the right plots (I checked my results on scilab)....
View Articlemoving body in a fluid domain
Hello I want to visualize the pressure variation on a solid in a predefined motion within a steady fluid(air) domain, and also see the variation of fluid around the solid body. I am using the FSI...
View ArticleStacking objects
For a project we have to analyse the forces of the stacking of ancient pots(amphora). We have tried everything we could think of with contact pairs and without but nothing seems to work. In the...
View ArticleUsing terminals and interpreting the capacitance matrix
Hi all, I have made a 2d axisymmetric model of an iron core with a given amount of turns around it. The turns are modeled as toroids or disks stacked on top of each other in one layer. This is a part...
View ArticleModel simple magnetic field
Hello, I am currently doing some research on generators and I would like to model a generator. I have found, read and made the tutorials from permanent magnet and 2D generator. Most things I understand...
View ArticleComsol Fixed temperature boundary
Hello! I'm sort of new to Comsol (3 days), but I can't seem to set up an object which has a constant temperature on two boundaries. I'm using an axisymmetrical 2-D model, with the 'Heat transfer in...
View ArticleImport Geometry Models into COMSOL
I would like to import CATIA files into COMSOL. I tried uploading it but i didnt work. Is it asking me for an extension package? Also, what is mphbin? Is it COMSOL's own AutoCAD software? If so, where...
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