Electrostatic and transport of diluted species coupling to an IPMC sensor model
Dear community, I am trying to build a simulation of an Ionic Polymer Metal Composite (IPMC) strip sensor, a thin membrane of polymer ionic on witch too thin gold electrodes are plated. It is a 2D time...
View ArticleIncompressiblity in Fluid Flow
I am trying to model the flow in a tube where on either side of the tube there is a sinusoidal pressure being applied and in the middle on the side of the tube there is an outlet where the pressure is...
View Articletransformer simulation with AC/DC, HEAT TRANSFER
Hi everyone, I would like to simulate a three phase transformer in 3D with more module in the same time. The aim of my model is seeing the effect of the magnetic field (eddy current, leakage flux) for...
View ArticleDifferent Solution when "Non-Relevant" Parameter is Changed in 3D (but not in...
Hi all First of, thanks in advance for reading and hopefully reply to this thread. The main problem is, that when I change a parameter in a 2D simulation, the results do not alter and that's how it's...
View Articledefining integral in comsol
Hello, I'm new to Comsol. I'm using the electrostatics module to solve for the potential and electric field. Then I want to define a variable P which is an integral of a function dependent on the...
View ArticleInner and outer solution
Hi, I made a parametric sweep in combination with a terminal sweep using the Electrostatic interface. What is the difference/definition of the inner and outer solution in COMSOL which is found in the...
View ArticleModeling Boltzmann Transport equation in COMSOL using coefficient form of PDE
Hi, I am modeling Phonon transport using Boltzmann transport equation. Referring: a. www.comsol.com/paper/nanoscale...tzmann-transport-equation-6408 b....
View ArticleRequest for basic help
Hello everyone, I'm very new to comsol and am looking for some help with a capacitor simulation. Right now I have 2 parallel plates and a charged sphere simulated. I need the plates to not move and to...
View ArticleTubular permanent magnet motor modeling
I just took a look at a new model in the application gallery, called "Tubular Permanent Magnet Generator":www.comsol.com/model/tubular-p...rmanent-magnet-generator-20381 In the case of the generator, I...
View ArticleMicro Thermoelectric Generator and circuit.
Hello I have designed a Micro Thermoelectric Generator (μTEG) and now I want to connect it to a simple circuit with only a resistance load (RL) to know the power disipated by this resistance. I think I...
View ArticleCombination of Moving Mesh and Laminar Flow interfaces
My model consists of a bellow which goes up and down periodically with a square function, and, by that, it moves a fluid which is inside. I'm trying to attach both interfaces by setting the mesh...
View ArticleHow to specify a particle distribution in particle tracing.
i wish to simulate a particle tracing in a fracture. i can do this programmaticly with fortran. i want a lognormal distribution of particle diameter. so when i start the simulation at time=0 a...
View ArticleAccess eigenfrequencies
Hi, I want to optimize a given geometry, so that the difference between the two lowest eigenfrequencies is minimized. How do I access the different eigenfrequencies solutions in the optimization...
View ArticleInvalid field variable in property Llimitfivar
Hi, I'm new to Comsol 5.1 version and i have a problem with my simulation. Does anybody know what "Llimitfivar" is? I'm searching for it's meaning for some time and i can't find anything. I have no...
View ArticleSolving differential equations (Diffusion and Reaction) using the Mathematics...
Hi all I'm trying to learn a bit of mathematical modeling of chemical reactions whilst combining it with the Mathematics physics of COMSOL. I am however, in a bit of trouble and I hope you can help me...
View ArticleApplying DC voltage to get current distribution in a biotissue
Hi, I am looking for some help to make a model which will so current density distribution in a biotissue after applying dc voltage. Thanks in advance.
View ArticleElectric field for concentric spheres with a current source
i am trying to compute electric field and potential for a four concentric spheres with different connectivity. inject a constant 1 [A] current from one cylinder (source) and eject from other one(sink)....
View Articlefrequency-transient equavalent simulation method
Hi, I am wondering whether it is possible to do a simualtion by taking a method which is equavalent to the frequency-transient solver. For example, i'd like to perform a electromagnetic heating by...
View ArticleFluid-Structure Interaction Particle blockage
Hello! Have a nice day! I am solving one problem in COMSOL Multiphysics Fluid-Structure Interaction model (FSI) at the moment. I need to take results in which particles must blockage porous media. I...
View Articlesetting logging time step size and time step taken by solver
I am using Comsol to model a problem with time dependent boudary conditions. The boundary conditions vary with high frequency, so I set the maximum time step very small, to 0.001 seconds. However, I...
View Article