A Swept Quad Mesh Within Free Tet - Quality Concerns
Hi everyone, I'm looking for some advice on a meshing problem that I have - I have a heat load imposed on a 3D rectangular beam embedded within a larger beam of the same material; the two beams form a...
View ArticleSimulation of composite laminates
Hi all, Do you have any idea of modeling (simulation) of laminates , e.g. bi-layer composites having layers with different elastic modulus avoiding the so called 'free edge effect' (a stress...
View Article2D Axisymmetric and 2D simulation of permanent magnet
Hi, I am trying to simulate magnetic fields from a permanent magnet in simple 2D and 2D axisymmetric configuration using magnetic field no current module but COMSOL is erroring out saying that the...
View ArticleAcoustics - Large models convergence
Hi, I'm driving crazy about this subject. I think don't know many things about this model, but regardless how mesh, solver configuration (multigrid, iterative, direct, etc.) or any other thing I change...
View ArticleMoving Mesh velocity in tpfmm
Hi, I'm wondering how COMSOL calculates the mesh velocity (tpfmm.x_free ) in the tpfmm module, as I define a flux in fluid-fluid interface I want to know it because the velocity is very slow and need...
View ArticleUnable to evaluate an expression
Excuse me, I am getting an error as Attempt to evaluate real square root of negative number. Function: sqrt Failed to evaluate expression. Expression:...
View ArticleLiquid-Vapor interface drops very fast
Hi I have encountered a problem in COMSOL when using the “laminar two-phase flow, moving mesh” physic. A simple model indicating what I am trying to solve is provided in the attachment. As you can see...
View ArticleThe relation between mesh size and time step in time-dependent study on heat...
Dear all, I am simulating heat transfer problem and when it comes to set up the mesh, is there a limit on the max mesh size according to the time step I set up? Say I compute the heat transfer and want...
View ArticleGlobal Size Node in Mesh Tree
Hi everyone, I have a question about the global size node the in the mesh tree that I can't quite figure out. I don't understand how it is still affecting my meshing scheme when every domain in my...
View ArticleUsing previous solution as initial values
Dear all, I am trying to get familiar with how to use results from a previous solution as initial conditions in a new solution. To do this I am using a very simple model (see description down below)...
View ArticleThermal stresses in Al2O3 cylinder due to laser heating
Hello All, Thank you in advance for reading this. I have an issue with a solution of a 2D axisymmetric model with coupled heat transfer and solid mechanics effects. A relatively thin cylinder (like a...
View ArticleStirring tank/Rotating Machinery problem
Dear all, I was trying to add a 3d barrier inside the stirring tank. However, I'm not familiar with the rotating machinery. I don't know how to set up the boundary condition for the new barrier. The...
View ArticleLaminar two phase flow, moving mesh
Hi, I am going to model a vapor bubble that is growing in the liquid inside a 2D channel. liquid has an inlet velocity that drag the bubble downstream and also bubble is growing due to the mass flux of...
View ArticleProblem with meshing my geometry in the corner
Hi Can anyone help me get my desired mesh in the corner of the curved surface found in the attachment? This is a 3D model and I used tetrahedral meshes. As I decrease the mesh size, I still get one...
View ArticleMesh equation
Hi, Does anyone know the form of equation for creating mesh? I can´t find it in the system´s help. Thank you
View ArticleUsing symmetry to create a heat sink
Hi guys, I am looking to design a heat sink with pin fins however I'm finding that if I make a full design it takes ages to compute. How can I use some form of symmetry so that the software only has to...
View ArticleMemory Problems with Magnetic Field Shielding Simulation
Hello everyone, I am working currently on a simulation designed to test the effectiveness of a magnetic shielding system. The simulation has the following elements:• Simulation volume: cylinder with a...
View ArticleWarning: relative tolerance error
Hi We implemented some simulations about our project 'comb-drive'. After compute, it showed warning 'There was an error message from the linear solver . The relative error (0.081) is greater than the...
View ArticleWeather Conditions on a Plant
I'm working on a project, which i am making a study about the interaction of sunlight with a plant at a specific weather conditions. The problem that i am facing is that i don't know how to input the...
View ArticleMoving Mesh (ale) with magnetic fields
Hello, I am working on a simulation to use a magnet to pull another magnet. My model couples the Structural Mechanics Module (solid), the Moving Mesh Module (ale), and the Magnetic field Module ( mf)....
View Article