Urgent problem on 3d geometry meshing(model uploaded)
Hi! I have using Comsol to draw a complex geometry as shown in the attachment, but it always has the error message: fail to insert point. And each time I refine the mesh, the insert point location...
View ArticleTransport through diluted species-Time dependent problem
Hello, I am performing a time dependent analysis for transport through diluted species based on the solution I obtain by performing transport through free and porous region in the same geometry....
View ArticleDC discharge modelling query
Hello I am modelling a DC discharge in between 2 electrodes which are positioned asymmetrically. I am making use of the example model in comsol library (positive column-2d). Both models are attached in...
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 ArticleCOMSOL uses different dof numbers to solve a model with different boundary...
Hi I need to solve a proelasticity equation for different boundary conditions and save the solutions, u1 to un, in MATLAB in a matrix M as M=[u1 u2 ... un]. The problem is that when I solve the model...
View ArticleSymmetric meshing
Dear all, I'd like to learn if it is possible to have symmetry axis in mesh. I'm working on a 3D model, and the geometry is symmetric in both x and y axis. I'm studying on eigenfrequency analysis and...
View ArticleCreate free Quad mesh with different element size dependent on surface parameter
Hi, I am running structural mechanics simulations to calculate stress from vertical deformations. It is very simple, think about a cuboid of an elastic material and the surface gets deformed. My input...
View ArticleGreat mechanical expansions
Hi everybody, I am trying to simulate with Structural Mechanics Module in 2D axial simmetry (COMSOL 3.5) the following situation: I would like to predict the stresses of a material under the loads...
View ArticleDoes COMSOL support user-defined element like Abaqus does?
Hi all, Anyone knows if COMSOL support user-defined element like Abaqus does? I am now using eXtended finite element method(XFEM), in which, the elements cut by the interface are enriched, so there are...
View ArticleUsing COMSOL for Meshing and Solving of Specific Element
Dear Colleagues, I am new to COMSOL and have very basic question. I am working of flow and stress in porous media. As part of my research, I will develop an element with specific degree of freedoms at...
View ArticleHow to apply force on 3D PDMS (Polymer)
Hi, I need guidance in applying Force on 3D PDMS which is surrounded in between two steel plates. After designing Plates and PDMS which parameters (Physics) has to be checked and handled. Thanks
View ArticleCracks in COMSOL
Hello Mr. Ivar I have seen your replies and you helping people with their posted questions. I have been stuck on creating a crack in COMSOL. I read a paper where the author created a crack in a...
View ArticleERROR - MESH SIZE
Good night, I am having an error starting a simulation of piezoacoustic model of a sonar with a mesh size of water domain for maximum analysis frequency of 100 kHz :"Failed to find a solution for the...
View ArticleCOMSOL for an element developed in MATLAB
Hi everyone, What is the best way of using COMSOL as solver and for preprocessor (creating the model and meshing) for an element developed in MATLAB? Is it even possible to have a user-defined element...
View Article[URGENT]Problem with boundaries-Solid Mechanics?
I've been wracking my brains with this for the last few days. I keep getting a convergence error which most likely is due to an error on the boundary conditions? Attached is my file with what I have. I...
View ArticleIterative Stationary/Time dependent procedure
Hello, Does COMSOL allow for an iterative procedure of the following type: Use a stationary solver to find the solution of the Laplace equation for a prescribed boundary data in a given 3D domain; then...
View ArticleMeshing of thin large metal sheet
Hi, I am using comsol to simulate a cubical hf-shielding chamber. It consists of 6 aluminum panels and has an edge lengt of about 2.5m. Since the cube is not seemless in reality, I left gaps in between...
View ArticleAn issue with the connector in the Stress Analysis
Hello I'm trying to model pressured round membrane in Solid Mechanics. The situation is shown in the attached diagram. The task is to define maximum stress, which appears near the membrane-to-fixed...
View ArticleProblems with implementing PML
Hi everyone! I`m trying to implement PML in my Comsol model and have a question: My model consist of vibrating plate (500*350*0.5[mm])with 0.5 m/s2 acceleration on the edges and I want to evaluate the...
View ArticleCracks in COMSOL
Hello Mr. Ivar I have seen your replies and you helping people with their posted questions. I have been stuck on creating a crack in COMSOL. I read a paper where the author created a crack in a...
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