Use "Derived Values" in other evaluations
Hi Everyone,I am trying to figure out a way to use line integration results (under Derived Values) in a global evaluation. I am using two separate line integrations on different boundaries and I would...
View ArticleHow to obtain x, y, and z component of a vector field
Dear Sir,I am required to model poisson nernst plank equation ussing coefficient form of PDE. For this, I need to enter x and y component of velocity field u. For instance, u=Ai+Bj+Ck is vector with A...
View ArticleMicrowave Heating
Hi,I have been trying to simulate microwave heating for a model that I made using COMSOL 5.2. The problem I am facing is that the simulation is stuck at iteration of geometric multigrid and BiCStab. It...
View ArticleHead boundary condition in brinkman equation for subsurface flow
Hi,I have problem in defining the appropriate boundary condition for Brinkman equation. I have a 2D model (a cut of mid points along the river; basically it is the river topography along the river...
View ArticleHiding geometry entities
Hi everyone, I started using COMSOL today for my very first time, and I have a little problem. When I try to hide a geometry entity, such as a boundary or a domain, it doesn't disappear from my view,...
View ArticleCalculate heat transfer in superconductor coil
Dear all,I am working on the high temperature superconducting coil. I would like to use Comsol multiphysics to simulate heat transfer in the HTS coil. Could anyone know how to add superconducting...
View ArticleElecromagnetic force caluclation
Hi there,I am modelling the force produced by a permanent magnet on a ferromagnetic plate. I am using the inbuilt force calculation within the mnfc interface, with a low permeability gap between the...
View ArticleAnybody solve my problem about Heat transfer
Hello, I'm mechanical engineering Sudent.I'm faced with a problem about Heat transfer. water domain(4) has problem in computing as like stiky note. MPH file is so huge(91MB) that if comment your...
View Articlepiezoelectric energy harvester
Hello everyone I am working on the Piezoelectric energy harvester. In my model, I have two PZTs connecting in an opposite direction. I am applying force on the first PZT so it will deflect and strikes...
View ArticleDilute Species Model, inputting species as ppm or percentages
Hi,I'm working on a deactavation model for a DOC catalyst in Comsol 5.3a. The data I have been able to source form literature is all in ppm or percenatges, and Comsol will only allow inputs in mol/m^3....
View ArticleHow to make circular rings in COMSOL Multiphysics 5.4
Hello, I am fairly new to COMSOL Multiphysics and I am trying to build a capacitor enclosed by a series of circular rings in 3D.I have attempted it by building a series of helixes with 1 turn along...
View ArticleNavier Stokes (2D flow between parallel plates) using coefficient form PDE
The below post is related to an archived discussionHello,I am trying to simulate incompressible flow between parallel plates by using the coefficient form pde, in order to get hang of modelling using...
View ArticleHow to duplicate models efficiently
Hello, I am new to using COMSOL Multiphysics and Livelink and I was wondering if there are any time efficient way to create a series of duplicated models in geometry.I would like to find a way to...
View Articleelectric field simulation
Hiim trying to create a plot of electric field but only get the electric potential plot.i would like to look for your advice since i need this simulation to be done ASAP.Looking forward for your reply,...
View ArticleQuestion about import external data in cylindrical coordinate system?
Hi all,My geometry is a cylinder and I intend to import external heat source data to it.The external data table in .csv file has 4 columns, for example: r(cm) fai(rad) z(cm) power(w/cm3) 1 -3.14 0 10 2...
View ArticleSpecifying Gravity in Free and porous media flow
Hi, I am trying to simulating a drop which gets dropped from some height onto a porous media. I can't seem to get the option to specify gravity in the free flow portion of my simulation. The physics...
View ArticleHeat transfer module
Good day everyone,I am currently working on a heat transfer problem in COMSOL. Here is my problem:https://www.engineersedge.com/heat_transfer/conductive_heat_transfer_pipe_13841.htmBasically, in my...
View ArticleHow to define the integration of electrical resistance
how to integrate the electrical resistance of a thermoelectric generator with a trapezoidal shape in the case of 3D simulation
View Articledefine a raster scan beam
HI,I would like to have a raster scanning beam in a certian area of a domain (top surface). I find a moving laser in aplication module, but I could not extend it to a raster scan beam.is there anyone...
View ArticleBioheat Transfer Configuration
I'm trying to simulate the temperature change due to the microwave heat source (antenna) in a specific point located in muscle tissue as it shown in the attached picture. In order to do that, I am...
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