PEM Fuel Cell
I am simulating Oxygen flow pattern in Proton Exchange Mebrane (PEM) half cell (cathode side). I manage to produce the 3D plots for Oxygen concentration,current distribution, velocity and Pressure....
View ArticleHow to build a three-dimensional model that is symmetry about one plane
I know the COMSOL can build a three-dimensional model that is symmetry about axis. However, how to build a three-dimensional model that is symmetry about one plane?My model is a thermal-electrical...
View ArticleDoes the model of the adhesive force of double sided sticky under the...
Hi, simulating the adhesive force of double sided sticky under the sinusoidal vibration. Two boards are connected by a double-sided adhesive, the upper of them is fixed on a sinusoidal motion shaking...
View ArticleQuery regarding parametric sweep for Particle Tracing module
Hopefully you all would be fine. I have a query regading parametric sweep. I'm doing simulation on particle tracing module. I have set initial position of particles and have given them velocity...
View ArticleAxial Symmetry in User Defined Physics -> Coefficient PDE
Hi,how do I get axial symmetrie in Coefficient PDE? I have a 2D Axial-Symmetry-Model. Whenever I create a new standard Physics, Comsol automatically adds the "Axial Symmmetry 1" as a boundary condition...
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Insulating spherical ball inside of the constant electric field
I am trying to model a simple textbook problem: insulating spherical ball inside of the constant electric field [Ref: Griffiths Introduction to electrodynamics 3rd ed Chapter 4.4.2]. You can see the...
View ArticleHow To Disable Diffusion in Two-Phase Flow, Phase Field Model
Hi all,I am trying to simulate a droplet made by fluid 1 (Φ=-1) travel through a channel filled with fluid 2 (Φ=1). The problem is, during the simulation, the fluid 1 (Φ=-1) droplet seems to diffuse...
View ArticleHow to Assign a Electric Potential to a Point(!) by using Comsol Livelink Matlab
Hello guys,I read almost all comsol livelink user's guide, and had a research online about it but i dont see anything about that.I created a 2D model in Matlab Livelink. And in my geometry, i have...
View ArticleHow to use linear extrusion (for temperature) with time dependent studies?
I am working with COMSOL 5.2a. I have a radiation heat transfer problem of several disks (added at different times) with radiation heaters at the top and bottom of the stack. At t=0s I like to start...
View ArticleAnalyzing the temperature increase inside the electrical cable as the...
Hi, I am modelling a single phase electrical cable with insulation layers. The cable consists of live , nuetral and earth wire. I want to make the AC current flow in the cable and analyze the...
View ArticleSum of the fields or losses in parametric sweep, initial conditions
Dear all,I have a question regarding making sum of the fields (5.3 version). I have a material which moves in the cavity, so I made model with the parametric sweep of that moving.As you all now, easily...
View ArticleComsol 5.3a
Hi, I am trying to compute my transformer model in comsol and it is giving me this error Undefined variable. - Variable: comp1.mf.VCoil_2 - Global scope How can I solve this error?Regards, Hassan Bhatti
View Articleinternal normal flux
Hi All, can someone please let me know what comsol means by internal normal flux down/up side in a 2D model. Is this different from normal total heat fuxes? Is it related to the out of plane fluxes...
View ArticleCauchy free drainage boundary condition
Hello, I need to implement a Cauchy condition in the Richards equation module. In particular it should be a free drainage condition on a boundary (ie water is immediately removed from that boundary out...
View ArticleMultiphysics Simulation: An IEEE Spectrum Insert 2018 Is Available Online!
Hello!We are excited to announce that this year's edition of Multiphysics Simulation is available online: www.comsol.com/offers/multiphysics-simulation-2018Read the magazine to learn about a variety of...
View ArticleConcatenating Solutions from Parametric Sweep
I'm doing a parametric sweep over frequency for my model. I'm doing small sweeps in order to see if that particular sweep was in the range I wanted, or if I need to keep sweeping. So 20 x 5min sweeps...
View Articlelaminar flow velocity profile does not run after saving the file
i ran a laminar flow velocity magnitude profile of 12 hours cycle (Sine wave) yesterday.It ran perfectly...and then i saved the file.After saving it i tried and that still ran.but today when i try to...
View ArticleHow to get output variable of thermoelectric generator
i'm doing a simulation of a thermoelectric generator. after designed geometry, specified different materials and temperature of cold and hot sides, i have got : output voltage, temperature...
View ArticleTruss in fatigue modelling
Is the fatigue model only available for solid mechanical modeling? How to simulate the fatigue model for truss modeling (edge molder)?
View ArticleHeat source probing of a single domain
Hi, I am simulating time dependent heat transfer of an IC. The IC have several heat sources that are temperature dependent and I like to probe those heat sources in order to have the temperature and...
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