export data in comsol 5 in 4D format
Hey everybody, After simulation of temperature distribution in a 3D-cubic model for a time period of 10 years (1,1,10), I want to export my data in matlab for further calculations with another...
View ArticleAutomatic remeshing with deformed geometry/moving mesh singularity
Hi, I am trying to model a sphere that changes phase from the outer radius moving inwards, but I'm having some difficulties. Using deformed geometry I can simulate it up to a certain time, however...
View ArticleTeflon Die Extrusion
I am new to COMSOL and need some help/advise from someone with experience. This simulation is modeling a 25% glass filled-teflon billet extrusion through a steel die (1/4 of the entire model). I added...
View ArticlePhysics controlled mesh in 4.0
Hi Is it possible to create a physics-controlled mesh in the version 4.0? I know that 4.1 can do it, but I'm not sure how to do it in 4.0. I'm working with non-isothermal flow, so I need to make the...
View Articledesigning of capacitor which must be capable of lightning harvesting
I am trying to design a capacitor model under different dielectric materials and to analyze the behavior of capacitor. Can any one tell me how can i change or model capacitor with different dielectrics...
View ArticleGridblock Value
I've set up the necessary equations for Enhanced Oil Recovery using a chemical flooding technique. I need to know quantify flow rates out of a grid block. For this I need to determine specific...
View ArticleHow to enforce minimum gap between two vibrating structures- FSI
Hey John, I am working on vocal fold aerodynamics. I am trying to perform 2D Fluid Structure Interaction simulations in which the air flows between the two vocal folds. The gap between them is very...
View Article[Application Builder] Accessing Mesh Nodes
Hello everybody, I am looking for a possibility to access and edit the physical properties of single nodes in a mapped and swept three dimensional mesh. The problem is that I have a complex geometry...
View ArticleError
Hi everyone!! i had following error in my model.. can any one say what it is?? Unknown function or operator. - Name: mod1.mf.mtcd1.ccc1.int_term
View ArticleMeshing tips for high aspect ratio geometry?
Hi everyone, I am trying to simulate Joule heating in a simple geometry. The current is injected into one metallic nano wire with a high aspect ratio (thickness 60 nm, width 1.5 um, length 50 um) below...
View ArticleMaterial Removal - Deformed Mesh
I am trying to build a simple 2D model using the heat transfer model. I have a constant heat flux through a surface. The regions with temperature higher than the critical temperature evaporate...
View ArticleSimulating a solid cylinder with a transient displacement point source to get...
Hello, I have been trying to simulate a cylindrical model using structural mechanics(time dependent) with a transient displacement point source (0.00005*sin(2*3.14*3000*t)*e^(-((t-t0)^2)/(2*(sigma^2)))...
View Articlebaffled duct - PML 3D PROBLEM
Hello every one, I’d like to excite a cylindrical waveguide (rigid in one face and flanged in the other one) with a monopole located in M(x,y,z) and compute the pressure inside the duct. Also, compute...
View ArticleBasic GaN TFT Simulation, Mesh error
Hi everyone, I am new in Comsol, so probably my issue will sound funny to you, however I could not solve that problem and want your help. I want to simulate a basic thin film transistor (TFT) in 3D in...
View ArticleJoule Heating and Thermal Expansion
Hello, I'm trying to solve the problem of Joule Heating and Thermal Expansion by applying current via terminal. Somehow I'm getting the following error."Failed to find a solution. Singular matrix....
View ArticleLight Propagation in Tissue
i just want to simulate the propagation of monochromatic light (800nm) in a 3 Layer tissue model 3D. Does anyone know a working Comsol solution? Problem: to many elements with this wavelength. Setup: 3...
View ArticleImplementing a two-temperature-model (electronic/lattice) for fast...
Hi I am trying to solve a similar problem and I am using PDE (c) interface. Anyway, how did you try to solve it? Thanks!
View ArticleMesh memory for large model in parallel computing
Hello everyone, I have a problem with solving a large model in parallel computing with comsol. I have a distributed-parallel processing system with 6 nodes, each has 16 cores. And i have 128 Gb of...
View ArticleWhat exactly is a point probe (3D) measuring?
I'm solving a reaction-diffusion model in a 3D geometry consisting in a simple sphere (radius 10 mm) with some point sources in its surface. I've configured a point probe right in front of one of those...
View ArticleMeshing geometary
Hi All, I am currently using comsol 5.0. most of the geometry that I am modelling are pretty simple. either cylinders or cubes or cuboids. the ratio of length to thickness is pretty high. lengths being...
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