Clik here to view.
Simulation cauchy cube
Hi, I try to simulate the deformation of a simple cube without any boundary conditions but in static equilibrum( sum of resulting force and moments are zero, for example applying two forces equals and...
View ArticleClik here to view.
Simmetry in COMSOL MF
Hello, I am modelling an electromagnet. The geometry is pretty big and I would like to reduce computation time using some simmetry. For example along the y direction (which is also the direction of the...
View ArticleClik here to view.
magnetic field surrounding a permanent magnetic block
Hi, I'm building a COMSOL modeling to simulate the magnetic distribution of a magnetic block. I drawn a box (stands for the magnetic block )and another larger box to contain the magnetic block (stands...
View ArticleClik here to view.
How to remove the waviness in MISES STRESS curve
Hi, Recently I simulate an elastic-plastic model in solid mechanics module. When I get the mises stress curve, as shown in fig.Mises. I found there are many waves on the curve. How can I avoid this...
View ArticleClik here to view.
"Extrusion" along a predetermined path
Can a 2D work-plane be "extruded" into 3D along a predetermined 3D curve, and If so, how?
View ArticleClik here to view.
Potentiometry
I feel like my issue should not be that hard, but I am struggling to model this. I have a system in which there is a very nonpolar (organic) membrane between two aqueous solutions. I am trying to model...
View ArticleClik here to view.
object shape changing due to high aspect ratio
Hello everybody, I am a bit new on COMSOL platform. I have been trying to model rod which is 50.4 mm in length and 10 um in diameter. I have been using structural mechanics module for that as I need to...
View ArticleClik here to view.
Periodic antennas
I am simulating far field pattern of periodic gold discs over glass substrate. For that, I am simulating a unit cell for scattered field with plane wave as background. ( I am working with COMSOL 4.3a)...
View ArticleClik here to view.
Applying Boundary Conditions Based on Deformed Geometry
Hello everyone, Right now, I am trying to solve a coupled physics problem involving deformation and electric current. In essence, what I want to do is correlate electrical resistance between two...
View ArticleClik here to view.
Defining a variable....
Hello everyone, I would like to define a variable suppose 'a' that starts from 0 to 1 with stepsize=0. I did this in local variables with 'range' operator but if i do it for 0 to 3 its ok but if i do...
View ArticleClik here to view.
Expression for mesh quality parameter
I understand that the Comsol mesh quality parameter, represented by ale.qual or dg.qual, is some function of element aspect ratio that represents how stretched it is. However, I could not find the...
View ArticleClik here to view.
Electromagnetic wave / refractive index depends of Electromagnetic field
Good afternoon everyone, I'm student in an engineering school, and for an internship I need to use comsol. I have to study , electro-optic, and particularly modes at the exit of an light guide. For...
View ArticleClik here to view.
Converting a complex boundary to an aea
Hello, I have a problem building a geometry. After searching in the community without finding a solution I decided to start a new discussion. Here is the short form of the Problem: Its a 2D-Model,...
View ArticleClik here to view.
Lorentz Term for Ferromagnetic Bodies
Dear All, Going through the "Magnet Falling Through Copper Tube" example (www.comsol.com/model/magnet-fa...ling-through-copper-tube-13875), I saw the following sentence explaining where the "Lorentz...
View ArticleClik here to view.
How to build a moving geometry???
Hello everyone! I am using Electrodeposition Module. The anode of geometry is moving as the time goes, and the moveing anode is Piecewise function. ( The physical field is Electrodeposition,Tertiary...
View ArticleClik here to view.
Frequency-transient Electromagnetic Heat Source & Heat Transfer with Phase...
I have created a coupled multiphysics model which refuses to solve. The model consists of a 2D periodic domain containing an EM wave incident onto a surface which uses the 'Heat Transfer with Phase...
View ArticleClik here to view.
Flow across a semi-permeable membrane
Hi , I am trying to model flow through a semi-permeable membrane due to a pressure gradient. For now, I am using free and porous media flow physics and for my geometry, I have set up 3 rectangles next...
View ArticleClik here to view.
piecewise function
Hi forum, I have made a piecewise function start end function 0 0.125 1 0.125 1 0 1 1.125 1 1.125 2 0 .........and so on. It means, every second, only 1/8s there is a high temperature and 7/8s there is...
View ArticleClik here to view.
Forward rate constant of SF6 gas reactions
Hi: How can I find the forward rate constant of the following reactions? Reaction === Threshold energy (eV) SF6 + e → SF5 + F + e === 9.6 SF6 + e → SF4 + 2F + e === 12.1 SF6 + e → SF4 + F2 + e === 11.3...
View ArticleClik here to view.
Regarding Shape Memory Alloy ( Nitinol) Constitutive Modeling in COMSOL
I have doubts regarding simulation of SMA , in which specifically i am working on Nitinol . How we can do constitutive modelling for Shape Memory Alloy in simulation?In COMSOL multiphysics , as such...
View Article