simulation of solidification or crystallization using Phase-field method?
I didn't find examples in the model libraries that can be referd to. Does anyone can recommend some references to me to read about how to simulate solidification using the phase-field method in COMSOL?...
View ArticleRF module and Electric Circuit
I was wondering if anyone has had any luck using the RF module along with the electric circuit module? Trying to model a dipole with a diode between leg, with an induced voltage across the terminals....
View Articleanode and cathode
Hello everybody! I'm creating a plasma with a Inductively coupled plasma and laminar flow interface. I want to put the electrodes (anode and cathode) in the model (within the device) and apply voltage...
View Article3D optical waveguide error
Hello everyone, What I'm trying to do is basically simulate an optical fiber in 3D. I thought it would be a simple task but I'm running into an error. I created an optical fibre with an air cladding....
View ArticleIntegrate one Study in another
I am trying to solve a study with a fluid flow problem and an electrochemistry problem. Both studies can be solved by themselves but if I want to solve them together or use the Velocity field of the...
View ArticleError in the demo model ?
There is a demo example "Thermoelectric_leg.mph" available in the Multiphysics installation and it locates in directory c:\program files\COMSOL\COMSOL43b\demo\builder\thermoelectric_leg.mph". It uses...
View ArticleNavier-Stokes Simulation using Coefficient Form PDE
Hi: I need to simulate fluid flow in a triangular duct, but I need to run it on a high reynold number. The problem is that when I run the model using the default "Laminar Flow" physics tab, I need a...
View ArticleLocal current density
Hi, I am working on a simulation of a redox flow battery. I used the redox flow battery model COMSOL provided and edited it a little. I don't understand it fully and what puzzles me the most is that...
View ArticleHow to connect a COMSOL model between two nodes of a circuit?
How to connect a COMSOL model between two nodes of a circuit?
View ArticleComsol 3.5a: Simulating Superconductivity with respect to time.
Greetings, I'm a newbie in Comsol using 3.5a. I am trying to model how superconductivity changes in time. I have the proper constants, scaler expressions, and subdomain expressions that I need. I have...
View ArticleSetting up simple optimization problem2
Hi, I'm trying to set up a simple optimization problem. I have a half sphere at the limit between two distinct elastic layers. I have first run my model using a successful parametric sweep to find the...
View ArticleLaser heating of Sphere
I'm currently attempting to model a spherical object that is being heated by a laser. I have defined the laser using a gaussian pulse with the function for the heat flux being: plaser*gp1(x)*gp1(y)...
View ArticleCombining different variables into one
Hello all, i am quite new in the COMSOL world so i dont know all the possibilities that go with it and i would like to know if somebody can tell me how to combine expressions for different time steps...
View ArticleProblem with interpolation function and variable
Hi ! I'm a beginner in COMSOL 4.2a and I'm trying to simulate a model using the Microwave Heating interface. I have to consider the temperature dependance for the thermal conductivity and the...
View ArticleAnisotropic Diffusion
Hi, I have a 2D geometry in which I want to define anisotropic diffusion. When I select this option in the menu and solve the problem I get weird results. When I check again the options, 'anisotropic...
View ArticleWhat is the motivation of new Nonlinear Structural Materials Modele in Comsol...
In my opinion Comsol Multyphysics was a tool for all. However, I am disappointed by the new Nonlinear Structural Materials Module. Since in earlier versions, comsol had already nonlinear material...
View Articlevolumetric shrinkage
Dear all, I have a question regarding the setting of initial volumetric shrinkage rate of a geometry. I want to simulate the polymerization process, during which volumetric shrinkage happens when...
View Articleweird deformation of ultra thin plate under thermal expansion
Hi, everyone, I am using the structural mechanical module to simulate the deformation of a ultra thin plate under the temperature change. the plate size is: length 100mm, width 5mm, height 0.1mm, the...
View ArticleHow To Create Cross Section In 3D
I have been simulating Mie scattering in 3D by using symmetry so that only 1/4 of my model has to be solved for. The problem I have is that I would like to plot the solutions of the full model with 1/4...
View ArticleConvergence in two-way coupled mass transfer
Dear all, I am trying to solve the concentration profile in a multiscale non-steady state two-way couple mass transfer problem (specifically, an extractor). This is as follows: Concentration at the bed...
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