Electrostatics and Transport of dilute species
Hi all, I am modelling a pn junction using the coupled electrostatic and transport of dilute species physics module for weeks now without any success. I followed the model in tutorial provided on...
View ArticleBoiling water
Hello, I am designing a humidification system for a Solid Oxide Fuel Cell test stand and I would like to know if someone could tell me if it could be possible to simulate in COMSOL boiling water in a...
View ArticleAssigning a sinusoidal electric potential to a boundary
Hello, I am relatively new to COMSOL and I am building a transformer model for use in researching different hysteresis losses and associated heat energy with using different core materials. I have...
View ArticleError
Dear all, Newely I have started to USE COMSOL In my simulation result it is showing the following error: Feature: Stationary Solver 1 (sol/s1) Error: Failed to find a solution Tell me what it mean...
View ArticleSolve hydro-gel swelling behaviour with comsol!!!!
Hi all, I want to solve a problem of swelling and relaxation of hydrogel with comsol. Is it possible to show swelling behave of hydrogel using comsol? Cheers!! Rajesh
View ArticleTo solve electric double layer between parallel plate
Hi. I'm trying to solve electric double layer between charged parallel plate using Nernst-Planck eqn & Poisson eqn rather than Poisson-Boltzmann eqn. Because I want to research double layer overlap...
View ArticleHow to get a solution for EDL
Hi. I'm trying to solve the electric double layer structure using Nersnt-Planck eqn and Poisson eqn rather than Poisson-Boltzmann eqn. My domain is pallel plate of which height is nanometric, typically...
View Articlerelation between two sudy
hi all, i created a model of piezoelectric device in piezoelectric module,now i want to transfer it to electromagnetic wave module because i need S parameters(that aren't in piezoelectric answers)but...
View Articleautomatic remeshing
Hello everybody, I'm trying to use the automatic remeshing function of comsol with the ALE method. This allows to remesh the geometry according to a specific criterion. My problem is that I would like...
View ArticleHow to calculate the impedance
Hi everyone, I'm trying to calculate the impedance after feeding my set-up with a constant voltage. As I have frequency-dependent parameters (relative permittivity and conductance), I expect complex...
View ArticleHow to couple pore water pressure to simulate triaxial test using Cam-clay model
Here are some questions I want to ask. Thanks! the figures are in doc file. Problem description: We want to simulate the behavior of soil sample from a trialxial test. The cam-clay model here is...
View Article[Please help] Magnetic-structural coupled analysis, result not good,model...
This is part of my thesis. I'm trying to simulate the magneto-structural coupled analysis on a magnetic gear. The attached file is partial of the model. If you have any advice, please see the model and...
View ArticleError in swept of a mapped/quad mesh
Dear all, I am getting a problem in the meshing of a multilayer, composed of 3 very thin layers (0.3, 0.01, 0.04 mm). I want to mesh them using a mapped mesh, and then swept (using one swept for all...
View ArticleMode shape change with the temperature sweep.
Dear all I am modeling a hollow sphere of Pyrex. I am interested on the temperature dependence of the frequencies. To veriify the simulation i started with a conventional eiguenfreqeuncy simulations....
View ArticleComsol 4.3b on Mac OS X Lion 1D plot causes freezing
Hi all, I've just installed comsol 4.3b on my macbookpro 13" running mac os x lion. It works perfectly until I try to visualize some 1D plot, e.g. the polar plot group 2 of the model library project...
View Articleshrinking and eventually disappearing mesh
Hello, I'm working a problem where a porous particle is being heated and vaporized. I am using moving mesh with a prescribed normal mesh velocity to shrink the solid domain of the particle (see...
View ArticleAutomatic remeshing at the specific time steps
Hi everyone, The automatic remeshing for Deformed geometry or Moving mesh model can only use the mesh quality as the remeshing criteria. Is there any way to force Comsol to remesh at the specific time...
View ArticleInlet outlet mass flux is not identical
Hi all, I am trying to measure the bulk temperature, but initial testing on the conservation of mass failed as it gave me different results between the inlet and the outlet mass flux. This result makes...
View ArticlePort to use for semi rectangular shaped coaxial cable excitation
Hi I am facing problem in assigning port parameters for semicircular coaxial cable excitation. If it is circular then can use coaxial port type also if rectangular coaxial port we can use rectangular...
View Articlesome basic questions about BCs and pressure
Dear sir or madam, I am making models about laminar flow and thin-film flow. I saw the velocity boundary condition in thin-film flow is called "normal inflow velocity". What is the difference between...
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