how to limit the temperature below the melting point and also how to deal...
Hello I am dealing with a coupled problem of magnetic field and solid mechanic including plasticity deformation. As the copper is heated, the initial yield stress is reduced and also temperature...
View ArticleNanoparticle Growth
I have started working on nanoparticle growth kinetics and nucleation of the metal atoms. This is my first experience with COMSOL. I want to know how to start things off. Even a simple model is fine. I...
View ArticleHow to input AC E-field to the system?
I'm a beginniner in COMSOL. I think my questions is a little bit silly to ask, but I don't know how to proceed without help from your guys. I want to establish simply a system of two plate electrodes...
View Articlemicro-ring laser simulation COMSOL 4.3a
Dear everybody, If I want to simulate a micro-ring as a laser and a bus waveguide near it as the output coulper, which model should I use? Which solver? And how to set the input and output ports? How...
View Articleslip boundary condition
hello everyone i want to use slip boundary condition in channel flow with the upper plate moves. how can i write it with lattice boltzmann method? thank you
View ArticleLaboratory Plate Shaker
Hi everyone Im new to comsol, I have had some experience with Microfludics module. But now I need to simulate the velocity profile in a laboratory plate shaker (used for denaturing protein-protein...
View ArticleSpecifying a rotating boundary condition
I would like to simulate a rotating wall condition. For simplicity, imagine a square box. On the top surface of that box there is a circle. Inside of the box is a viscous fluid. I would like to impose...
View ArticlePhase calculation related error due to incorrect boundary conditions?
I am trying to simulate a metal insulator metal fishnet structure which in infinite in the yz plane and the TE polarized wave propagates in the z direction. I have applied PEC on the planes (xy planes)...
View ArticleScattering boundary condition and port with plane wave
Dear all, I want to simulate the periodic nanostuctures on silicon. now i am using comsol 4.3a version which is not supported PML with port boundary. for that i need to define the Scattering boundary...
View ArticleDifferent 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 Article