Melting Front and Free Surface
Dear all, I'm currently attempting to build a model similar to the "Tin Melting Front" in the model library. This model describes the melting of a metal through the Stefan problem and models the...
View ArticleFinding Mutual inductance of spiral coil
Dear all, I modelled a two spiral coils which are separated by distance, I want to find mutual inductance between the coil, for that i try to select the surface (surface integral of flux density per...
View ArticleMovement of an Object in contact pair by deformed piezo surface
If a piezo surface is deformed due to application of voltage V, then how can a body be moved due to this deformation which is placed above it. As per the screen shoot, lower part is the piezo substrate...
View Articleinterpolation of complex functions
I am using Comsol 4.4 RF mode and would like some help, I need to use the Parametric Sweep to study the behavior of the wavelength, but in guia'optico contains metal and then the refractive index is...
View ArticleHow to do a parametric sweep of solutions in 1 study step to another study...
Hello everyone, I am trying to use a set of solutions from 1 study step (elastic eigenfrequencies) as initial conditions to a separate study step (optical mode analysis). I want to sweep through all...
View Articlesolution coupling
Hello I am working with particle tracing in a microfluidic channel under a magnetic field produced by a permanent magnet. I have tried to couple the stationary solutions of the laminar flow and...
View ArticleProblem importing the data file with CAD import module
Hello every one, when i try to import the scalar expressions for open_pipe model (under acoustic module) from cad data file, i get the following errors Erro : 3015 Unrecognised file type. Exception:...
View ArticleCircular Polarization Simulation in Time Domain
Hey, I am doing a simulation of free space with circular polarization in time doamin. I am using Comsol 4.1. I read through some comment of previous discussions. It looks like people are suggesting to...
View ArticleExtracting heat flux - 2D axisymmetric
Hi all, This is probably a very simple problem, but I'm fairly new to working with this type of result. I have modeled a sphere (2D axisymmetric) and am using the conjugate heat transfer model in v....
View ArticleOptimization with deformed geometry
Hello everyone, I´m quite new at Comsol and I´m using it for a school project, my aim is to study the evolution of the voltage produced by a piezoelectric beam when the height of the beam is changed....
View ArticleProblem with exponents in Comsol 4.4
Hello everybody I would like to give following equation in COMSOL 4a as a variable: rNO=-A*exp(-Ea/(R*T))*cNO^0.71 where cNO is given in mol/m^3, but I want it to be unitless. How can I do it? It seems...
View Articlehow to choose model between 'Fluid Flow' and 'heat transfer' for a simple...
i am doing a basic simulation for heat transfer through convection. I wish to learn about as on how to choose between various models in "ADD PHYSICS" like heat transfer. fluid flow..
View ArticleI need to help to model dust explosion
Hi I am beginner user of the comsol. I want to simulate the dust explosion with comsol and measure the flame speed. How can i model that?how can i simulate the spark and also the delay time?
View ArticleComsol Working group (Geodynamics and Earth Science)
Hello everyone, My name is Rémi and i am a PhD student of the Geophysic department at Uppsala University. My project during those five fallowing year will be to study the origin and evolution of the...
View ArticleCOMSOL 4.4 Update 1 is now available
Hello, I'm pleased to announce that COMSOL 4.4 Update 1 is now available at:www.comsol.com/support/updates This update corrects several bugs and stability issues in COMSOL 4.4 and its add-on modules....
View Articleplot geometry including a specified dataset (cutline)
Hey everybody. I use Comsol 4.3a with the Matlab live link. I usually plot my geometry using mphgeom(model,'geom1'). However, now I choose a dataset for the data analysis, for example a 1D cutline. How...
View ArticleUndefined value error
Good eveninng!!! I simulate a rather simple model of GaN light-emitting diode in 3D. Unfortunately, each time I start computing an error message pops up : "Undefined value of comp1.Ne found at...
View ArticleControling camera position in 3D animation output
Is it possible to control the camera angle in an exported animation? It would be nice to have an animation with the camera circling around the geometry....
View ArticlePost-process two different solutions from a Parametric Sweep...
Hello, I am using COMSOL 4.1 and I am facing a conceptually simple problem with no luck. Basically I have a simple 2D Eigenvalue Problem which gives me 20 eigenvalues (and 20 eigenmodes) and a...
View ArticleRF Module: material dispersion for transient simulations
How do I simulate structures with dispersion using the transient solver in RF module? I am new at this, so any examples or step-by-step tutorials would greatly be appreciated.
View Article