Large Deformations by concentration influx
I am trying to model expansion of a thin film due to concentration influx. I have coupled concentration to Solid Mechanics using analogous thermal strain (both are volumetric expansions) The problem I...
View ArticleProblem: Material, Boundary Conditions, etc. change during Parametric Sweep
Hello thereI try to make a Parametric Sweep over the width/depth of some material elements(rectangles in different materials). Unfortunately, the sweep stops all the time and everything has changed:...
View ArticleEvaluating Volume in Livelink
HelloI am trying to use Livelink to create a geometry in Matlab which I will then run a model on later. To build my geometric sequence I need a way of accessing properties such as the total volume of...
View ArticleElasticity matrix and coupling matrix for polyamide
Hi,I need Elasticity matrix and coupling matrix for polyamide. Will appreciate supportthanks
View ArticleAttempt to evaluate nonintegral power of negative number error message
Hello comsol community,I am a bit struggling on this error message. I am relatively new to COMSOL. So not quite familiar with what went wrong. Any sort of comments and guidance will be much...
View ArticleUtilize the same Stationary solution multiple times.
Good day I want to use a stationary solution as the initial input for multiple time dependent steps, but I do not know how to. I'm actuallty confused by the options given.I can use one stationary...
View ArticleFlux Variables
Hi community,I would to know the differents concepts of flux variables. For example, what is the difference between "normal total heat flux" (32.701 W/m) and "internal normal conductive heat flux,...
View ArticleError when opening COMSOL
Hello, I recently encountered a problem while opening COMSOL multiphysics which gave me and error, stating that an unexpected error has occured and that I should look to the end of the log file.Here's...
View ArticlePlot new physical variables
Hi all,I am new to COMSOL and just studied the Plasmonic Wire Grating tutorial using Wave Optics model.The only variables plotted in the tutorial are the Electric field and the Transmittance,...
View ArticleHow to solve Laplacian equation in Converging-Diverging Nozzle
I am right now having a 2D C-D nozzle model with a flux dphi/dx=1 pn the left boundary. I used laplace equation under PDE solver tab to solve. By setting the left boundary to flux g=1 and leave all...
View ArticleWave propagation in hyperelastic materials
Hello everyone,I tried to build a simple model to simulate a wave transmit from water into a hyperelastic material. I use Pressure Acoustics, Transient Modulus and Solid Mechanics Modulus. Everything...
View ArticleExport geometry from application builder
Hi,I am trying to create an optical simulation of fresnel lens, to which i made a geometry loop using the difference of cylinders to make each ring. As far as i know this procedure would take a lot of...
View ArticleDrawing vertical line in 1D plot
I have a 1D plot in COMSOL 5.4, and I want to draw a vertical line at a certain value of x on top of a pre-existing plot. It seems like it should be fairly simple, but I haven't been able to find any...
View ArticleUse "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...
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