Domain has a region that is much thinner than the specified minimum element...
Hi everyone,i wonder how do i solve this 'Domain has a region that is much thinner than the specified minimum element size' and 'Faces adjacent to a thin region'. i'm not quite sure what it is. can...
View ArticleAbout The Verification Example of Elastic Wave Propagation
Hi, folksI need a simple verification example for bulk elastic wave propagation simulation by COMSOL, in order to set up a confidence for other more complicated problems. I've searched for all...
View ArticleHow do I determine the electromagnetic torque of a rotating machine in a good...
Hello!So I'm trying to calculate how the torque of an electric motor changes depending on the injected current. I have tried two methods of calculating this torque, one involves applying Force...
View ArticleBrazing (induction heating) simulation
i am facing callenge with coupling of electromagnetic heating and leminar flow. Problem statement is to simulate solid to liquid phase change and liquid phase to flow in capillary and than solidify. i...
View ArticleCoil with litz wire in 2D
Hey there :)I want to model a coil with litz wire in 2D surrounded by soft iron. The coil should have 10 turns and the wire should consist of 8 litz. So all in all there are 80 litz wires. To...
View ArticleHow to calculate the Extinction Cross Section of two Ag side by side nano...
Hello all,I'm trying to calculate the extinction cross-section of Ag sphere Dimer (two NPs side by side of R=10nm), with a gap of 4nm, in Comsol Multiphysics. Now, I know how to calculate the...
View ArticleAdding extra pressure term to two-phase flow fluid-fluid interface
I'm using the laminar two-phase flow, moving mesh to model a liquid-air interface. If I use the External Fluid Interface (ignore the air layer), it allows me to specify the External pressure. If I use...
View ArticleSingularity in Stiffness matrix
This is the model of a tritare which has three stretched strings connected at the center. I undestand that it has a multifreedom constraint at the center. But still I believe it should be able to...
View Articleinclude gravity concerning elevation geometry
Hi. I'm new to comsol. Now I'm trying to simulate just a simlple mechanical model with ground surface geometry. I want to include the gravity effect to my underground rock mass model but the initial...
View ArticleThermoelastic effect: laser generated acoustic waves
Hi, I'm new to COMSOL. I'm trying to simulate the laser excited acoustic waves in a simple system of thin (5um) film of Copper on top of the thick (500um) Silicon substrate. I managed to defined the...
View ArticleParametric sweep for initial angle in rotating mesh
Hello!I was wondering, is it possible to do a parametric sweep for the initial angle of a rotating mesh in version 5.4? I have tried to make one but for some reason I end up getting the same results in...
View Article2D modelling of four core cable
Hi, I am new to comsol so forgive any ignorance I show.I am trying to invesigate the electrical characteristics of a four core LV cable by using a 2d model. So far I have been able to build the geomtry...
View ArticleAdd spheres based on x, y, and z coordinates and radius from txt file
I have a list of spheres in a text file that has the format of x, y, z, and radius. Is there an easy way have COMSOL add these spheres to the geometry? The only module beyond the base product that I...
View ArticleCOMSOL Multiphysics 5.4 Graphics Window Issue on Ubuntu 18.04 LTS
Hi, I have COMSOL 5.4 on my laptop running Ubuntu 18.04. The problem is that the graphics window does not fill the reserved screen field. Instead, it only occupies a very limited region which makes the...
View ArticleError Maximum Number of Segregated Iterations Reached
Hello COMSOL Community,I am trying to compute a solution for a model of a greenhouse that is composed of the laminar flow and heat transfer in fluids multiphysics. However I recieve an error stating...
View ArticleExpression for variables
I'm very new to this software and I'm now looking through the application libraries and tutorials. In one of the tutorials I come across, the modelling gyroscopic effect tutorial, there is a section...
View Article3D model of CPV-TEG
how can one perform 3D modelling and simulation of a coupled concentrated photovoltaic thermoelectric generator in comsol
View ArticleHow to simulate electrostatic attraction force without MEMS module
Hi, simulation folksAs written in the title, I'd like to know how to simulate the electrostatic attraction between two charged plates only using "Solid Mechanics" and "Electrostatics" modules? I know...
View ArticleInserting Function Plots in Application Builder
Hi,For a diffusion simulation, I utilized a piecewise function to formulate time-dependent diffusion coefficient based on several other parameters. I am able to plot diffusion coefficient vs time graph...
View ArticleComputing stiffness in Orthotropic material in a Mutliphysics
Hello everyone,I just started using COMSOL Multiphysics, and I am impressed by the software and the website. I tried to compute stiffness in an isotropic material, and the results were satisfying. I...
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