Moving Mesh issue at the inlet/outlet
Hello, I am working on a 2D model on a channel with some obstacles. The study is time-dependent and I have used the Moving Mesh (ALE). The lower boundary of my model is moving down. The inlet and the...
View ArticlePhase change not working, warning inverted element
I am trying to simulate the heating and phase change of a low melting point metal. In the mph file that I've uploaded to Google drive (drive.google.com/file/d/0B3QaD21DDcpNeFdlYjJwNWE4Rzg), you can...
View Articleprevent mesh size changing after the deformation
Hi, I am very new in COMSOL and physic simulations. I need to apply some robotic experiments on deformed objects. But before applying it to real objects, I want to test some setups using a simulation....
View ArticlePlotting the mesh of a cut plane through a 3D model
Hey guys, So i am currently doing some simulation involving parallel plate capacitors and i just want to see the difference between the meshes outside and within the capacitor. I've tried to create a...
View Articleinverted mesh element near coordinate
Hi dear all I want to see the mechanical changes due to flow of current through two parallel wires in COMSOL. To do this, first I used two "magnetic field" and "solid mechanic" modules. After getting...
View ArticleLinking to PSPICE Software
Hi, I am new to COMSOL and would like to model a piezoelectric energy harvester in structural mechanics module. Gradually, I would want to model the mechanical part in COMSOL and link it to PSPICE...
View ArticleMesh size and dimension of the structure
Hi Guys, I am quite new in COMSOL, and I have three small questions about the setting of the mesh in ewfd, frequency domain study. 1. I found the results will be different if I used different size of...
View ArticleMatrix has zero on diagonal
I have to solve a lid driven cavity (laminar flow) + melting problem (heat transfer in fluids and solids with moving mesh). I was able to successfully implement this in 2D. I have now shifted to a 3D...
View ArticleProblem with Inverted mesh element
I am trying to simulate a very small coil (1mm in diameter) within a much bigger coil (40.6 cm in diameter) to see how the magnetic coupling between the two coils behave when the secondary/receiver...
View ArticleProblem when using "Remesh Deformed Configuration"
Hi, I'm running into problems when using the "Remesh Deformed Configuration" on a solution data set that contains results from a simulation including "moving mesh" and "solid mechanics" physics. A new...
View ArticleNLfail despite low tolerances using fully coupled approach
Hi, I try to observe the heating of a system using an electric pulse, i.e. Joule heating (--> Laplace equation and heat equation). The conductivity of the material of interest depends on the local...
View ArticleQuality of deformed elements
Dear all, I have a question about models that use solid mechanics and experience large deformations. Imagine a 2D square heavily compressed, for example. To my understanding, at the end of the...
View Articleundefined value found_ problem when simulating a 3d semiconductor p-i-n diode
Undefined value found. - Detail: Undefined value found in the equation residual vector. There are 6 degrees of freedom giving NaN/Inf in the vector for the variable comp1.Ne. at coordinates:...
View ArticleHelp with modeling resistance in current collectors for lithium-ion
Hello, I am not sure if I am in the correct area of this forum for assistance I need. I am currently working on a model for current collectors in lithium-ion batteries. More specifically the voltage...
View Articlemeshing infinite element
Hi I have 2 concentric spheres. The outer layer is an infinite element, I am trying to mesh it with swept layers and am getting an error message:"domain must be bounded by one connecting face only"...
View ArticleHow to plot deformation due to heat flux
Hello everyone. I currently have a model where I have a significant heat flux through one side of a block(Si/Cu) and I would like to see how the structure of the block changes due to this heat flux. In...
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 ArticleUndefined variable. - Variable: comp1.es.epsilonrmZY Failed to evaluate variable
Hello, I am designing a MEMS actuated optical filter for WDM applications,I am designing this filter on a cantilever beam of silicon, and for actuation purpose we are using piezoelectric effect. A...
View ArticlePlotting the mesh of a cut plane through a 3D model
Hey guys, So i am currently doing some simulation involving parallel plate capacitors and i just want to see the difference between the meshes outside and within the capacitor. I've tried to create a...
View Articleinverted mesh element near coordinate
Hi dear all I want to see the mechanical changes due to flow of current through two parallel wires in COMSOL. To do this, first I used two "magnetic field" and "solid mechanic" modules. After getting...
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