where is the icon to add heat transfer with Phase change
I was going through one tutorial on heat transfer through phase change. In the menu under heat transfer in fluids i could not find heat transfer with phase change? Is it related to the version.
View ArticleComsol does not finish the calculation even though convergence criteria is...
Hi, I have a rather strange problem with COMOL and hope that anyone can help me. I am trying to solve a "free and porous media flow" on a 3d geometry. The calculation is not converging very well but it...
View ArticleAcoustic S Parameters Calculation
Hi, I have a very beginner-level doubt regarding the understanding of S Parameters- If we are to take the scattered sound pressure values, they have a real and imaginary part, i.e they are in the form...
View Articledual core effective index
Hi everybody, I want to calculate the effective indices in two cores of a dual core PCF separately.When I run the programme, light is confined in both cores simultaneously.I want to calculate effective...
View Articlewhat are the 'sweep'- 'motion of cross section' parameter bounds?
I am trying to create a helix which changes cross section throughout its length. I have managed to get it something like i am looking for but need to know how the parameter s changes along the path of...
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 ArticleDefining boundary conditions from previous solution
In the frequency domain RF module, I first computed solution 1. Next, I would like to define the electric field on the boundary for solution 2 (same mesh as solution 1) as the cross product between the...
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 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 ArticleFluid Structure Interaction -- Convergence Problem
Hello, I am working with the FSI module and I am trying to model an oscillating plate in an infinite expanse of fluid. I have successfully used the "sliding wall" boundary condition to do this, but...
View ArticleSetting the permittivity of particles for dielectrophoretic force in Particle...
Hello, I encountered a problem while setting up fluid model with DEP force. Direction of DEP force is dependent on the Claussius-Mossoti factor, i.e. complex permittivity of the particles and the...
View ArticleFailed to evaluate variable Jacobian.
Hi all! I'm a new user of Comsol. What I'm trying to do is to make a simple model (3D) in which there's a moving magnet placed under a spiral inductor and i want to see the induced voltage across the...
View ArticleGeneral PDE equation
I need to implement the tumor growth mathematically using General PDE equation. It would be great if you let me know is it possible to write my equation for source (f) at General PDE equation. if it...
View ArticleModelling Surface Plasmon Resonance on Nanorods
Hi. I am trying to model single gold nanorods of different size and shape extruding out of a thin gold layer with visible wavelength light incident upon it. The aim of this is to see how the geometry...
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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