Different results of Simulation from Solid Mechanics and shell
Hello, I have a problem when doing a simulation with a bend pipe meshed by shell element. The results of principal strains are one time larger than meshed by solid mechanics. But the results of...
View ArticleViscoplasticity: stationary and transient modeling
Hi! I am trying to work on a model that has both viscoplasticity (Anand model from the Nonlinear Structural Materials Module) and contact. First, it seems like I'm having penetration. A stationary...
View Articleissue with 2D couette flow of a Newtonian fluid.
Hi, I'm trying to solve a very simple problem which is a 2D couette flow of a Newtonian fluid. I made the geometry and have specified the boundary conditions. v_outercylinder = 0 vx_innercylinder =...
View ArticleMulti-Turn Coil Domain with Form Assembly goemetry
Hi everyone, I'm modelling coils using the Multi-Turn Coil Domain - I have a transmitter coil with an applied current and two receiver coils beside it. I have to find the induced voltage across the...
View Articleactivation energy as a function of the local electric field E
Dear all, I'm simulating the movement of charged species using Nernst-Planck module. Defining the Diffusion coefficient; I would like to define the activation energy for diffusion as a function of the...
View Articlesequencing solver
Hi, I am simulating fluid flow and heat transfer in a cylindrical pipe. what i need is a very long term simulation (i.e., 25 years) and I am using pipe flow module which assumes the pipe and 1D and the...
View Articleconnecting 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 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 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 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...
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