Boiling 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 ArticleUniform Magnetic field?
Hi everyone, I am wondering how I can generate a uniform magnetic field in Comsol. Basically, I want to simulate a metal particle moving in this uniform field. Now I am thinking put all the particles...
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 ArticleCurrent induced by a magnet
Hi. I'm really new to COMSOL Multiphysics and I think I need some help. I have a single turn coil and a permanent magnet, same radius and parallels, in 3D. I know that moving the coil, i can change the...
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 ArticleModeling a Dielectric as a Real Capacitor
Hello everyone, I am having trouble modeling something. I would like to look at the conduction/conductance/resistivity of a insulating/conductive composite. It could be thought to be like a...
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 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 ArticleBuoyancy effects for turbulence model
In nitf (non-isothermal flow), the way for setting the Buoyancy force is only can set the volume force(-rho*g)? However in somecase it is not accuracy for compare to the experiment result (the buoyancy...
View Article* 4.3b Webinar * Live Demo of New Features on May 14
Hello COMSOL Community, You are invited to join us tomorrow at 2:00 pm EDT for a free webinar showcasing the new features of COMSOL Multiphysics 4.3b! We’re excited to have Bjorn Sjodin, VP of Product...
View ArticleOptimizing with a complex number
Hello again, I am currently stuck with the optimizer. I made a forward model to give me the magnetic field, then using the optimizer, I am trying to get the resistivity of my model, by giving it the...
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 Article