connecting two horizontal plates
hello, I'm trying to simulate a layered wooden beam. the wooden beam has 2 different types of wood that follow each other up in the cross section of the beam. By connecting these plates with glue the...
View Articleelectrical circuit conditions
Hi, i'm tring to studing the current distribution and juole losses in an indutor. I work with ac voltage sourge of 1000V with a frequency of 20kHz. i use an impedence boundary condition because my skin...
View ArticleHow to get electrical force in AC/DC module
Hi, everyone! I am building a model in COMSOL. In this module, I build a container full of dielectric, like water. And I will put two electrodes on the opposite side, one 5V, and the other 0V. And I...
View ArticleWill the increase of the relative tolerance reduce the solving time ?
Dear all, as mentioned in the title, I would know if the change (specifically an increase) of the relative tolerance in Time Dependent solver (but also in Stationary solver, why not) will reduce the...
View ArticleForce Due to Electric Field
I am trying to obtain the force due to electric field. If someone can help me' that'll be great Here is my case - electrostatic module - Upper Surface of the airfoil has two copper electrodes (one on...
View ArticleAbout tutorial of light scattering on gold sphere
Hi all, I just started learning comsol with a tutorial provided by comsol.com. In the example, it solves light scattering problem on a gold sphere. I'm curious if I can pull out magnetic field for a...
View Articleerror " Reached end of data when reading"
Hi, I faced a very strange error related to my COMSOL files. The problem is, when I save a comsol file, I cannot open it again. The message error is “Reached end of data when reading”. I’m sure that...
View ArticleAssigning velocity as a boundary condition
Hi I am modeling an electrophoretic phenomena where the governing equations are - Navier Stokes equati - Poisson equation - Nernst Plank equation This is an axisymmetric model containing a half circle...
View ArticleHow to couple Soil Plasticity with Subsurface Flow Module?
Dear All: I am a beginner of using COMSOL for soil mechanics study. Recently, I am trying to study the influence of subsurface flow process on soil deformation. I use Richards Equation to get the pore...
View ArticleHeat Transfer after Deformation (Contact Pair)
Hi, i am trying to model heat transfer between two concentric cylinders where inner one is heated. The inner cylinder is pressurized and eventually touches the outer one. For modeling structural...
View ArticleDefine an arbitrary EM wave
Hello I am new in Comsol and i have a problem : i want to calculate SAR for SAM phantom for different types of EM waves. but the source of EM waves ( signal generator ) isn't important. is there any...
View ArticleSimple Magnetoresistance Model
Hi, my apologies in advance for what is probably a trivial question - I am new to Comsol. I am attempting to create a simple model of magnetoresistance. I have defined a permanent magnet in the MFNC...
View ArticleOpening COMSOL 3.5a files in COMSOL 4.3b
How can I open COMSOL 3.5a files in COMSOL 4.3b?
View ArticleSetting convergence condition in fluid simulations
Dear Sir/Madam I'm a novice in COMSOL use. I have a question regarding convergence in fluid flow simulations. I know that in FLUENT one has the possibility to set the divergence of velocity field to a...
View ArticleChemical Engineering Module using mechanistic scheme computed by Matlab
Dear all, I'm totally beginner on Comsol and i need some help. I've already solved a mechanistic scheme on Matlab which solves the evolution of the average molar mass of a polymeric material depending...
View Articlewhat is value of "relative permittivity" for gold (au) and aluminum (al) ???
any buddy help me to tell what value should make appropriate result in actuator of relative permittivity - au ____?? relative permittivity - al ____??
View ArticleSet geometry/boundaries using a variable?
Hello, I am trying to solve the device physics equations for a 1D (eventually 2-3D) solar cell with the PDE solver. However, a solar cell of fixed total thickness and two physical layers typically has...
View ArticleData import from one simulation in comsol to another
Hi, I checked the heat transfer in solids for my structure and now I need to use this heated up condition as an initial condition to cool down the device and see how long it will take, (time dependent...
View ArticleMMI waveguide design...using PML
Hi, I'm new to COMSOL, attended one of the workshops and have been going thru the tutorials. I'm trying to design a slab waveguide...with a core refractive index of 3.48...cladding of 1.54....about...
View ArticleAxisymmetric Hertzian Contact mechanics model
Hi, I am trying to model a sphere pushing on a surface. To do so, I have created a 2D axisymmetric model with a point load close to the apex of the half-circle; as putting a point load right at the...
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