Meshing a twisted wire
Hi, I'm trying to model the flow of current in a twisted wire. The inner rods are of steel, the outer of Al (see attached file). The steel rods are twisted clockweise, while the Al rods are twisted...
View ArticleHelp with meshing thin geometry
Hi I am new to COMSOL and have trouble meshing the attached file. It consists of a very thin layer between 2 thicker ones and thin spacing between the bars. Does anyone have any suggestions/link to...
View ArticleElectrostatics + Metal Electrode
Hello I'm completely new to comsol. I'm trying to simulate the electric field between some specifically arranged metal electrodes. Between them is some material with a certain permittivity. Now I get...
View ArticleHelp with meshing thin geometry
Hi I am new to COMSOL and have trouble meshing the attached file. It consists of a very thin layer between 2 thicker ones and thin spacing between the bars. Does anyone have any suggestions/link to...
View ArticleRemeshing of Deformed Geometry
There's a deforming part in a geometry with an edge moving downsides and the others hoding their position. After I defined the free deformation part and prescribed the mesh velocity, and run the model....
View ArticleSimulation error
Hi , I am getting this type of error whey i am trying to start simulation. "Variables property does not include all variables in Xmesh" Could anybody can give me any solution/ suggestion. Thank you...
View ArticleA SMALL DOUBT ON PORT POWER VALUE !
Hi all, I am new to this software and I am trying to simulate a multi-layer structure on which plane electromagnetic wave is allowed to fall at normal incidence. I kept the port power at the default...
View Articlename of the element
Hello everyone, I am working on a 3D model where each element has a specific permeability value, given in an excel sheet. Does anyone know how I can assign these values to my elements? One...
View ArticleProblem to converge a Reaction engineering, Diluted species transport and...
I want to degrade one component in a 3D geometry along with diluted species transport and laminar flow in it. My simulation runs okay in stationary study (i used step function here). But when i want to...
View ArticleFSI rotating mesh
Hi everyone, I'm trying to simulate a rotating object inclined in a laminar flow with the FSI physics. I managed to rotate an object with a body load, but it causes a lot of remeshing. The rotating...
View ArticleTwo electrodes, four layers
Hi everyone! I am trying to do simple model using 3D Comsol Multiphysics // AC/DC module // Quasi Statics, electric // time harmonic analysis ... two electrodes, 0.5V and -0.5V, four skin layers with...
View ArticleGhost domain, bug?
I have a curious problem with Comsol (4.3b and 4.4) with ghost domains. If i look at the geometry and select all domains, i have, ie 10 domains. When assigning materials, then the 11th domain appears...
View Articlecomb drive actuator
I am trying to simulate a basic comb drive actuator in comsol. The electrostatic force in y-direction is coming negative,although it should come positive. Kindly help me out as soon as possible. I have...
View Articlecomsol error failed to evaluate variable
Hi, i am trying to design spiral inductor using the physics "magnetic and electricfield(mef) but i have this error Failed to evaluate variable - Variable : mf.normB - Geometry: 1 - Domain: 2 3 4 5 6...
View ArticleLarge mesh with Beam Envelopes module
Dear all, probably I'm missing something about the use of the Electromagnetic Waves, Beam Envelopes; as I understand well, this module can be used to simulate a long waveguide (some mm or cm long) but...
View ArticleMesh Problem
Hello, I have problem with mesh generation for my model. I made a 3D glass beads with lots of grains. When I want to mesh that I faced some error in meshing. sometimes it meshed but then during study...
View ArticleMeshing problem
Dear colleagues, I'm modelling a thin walled element (solid geometry) and I want to mesh it with an hexahedral mesh with only one element along the thickness. I attached an image of the geometry. The...
View ArticleOptimisation of processing parameters in laser sintering of metal/alloy powders
Hi everyone, I am new to COMSOL Multiphysics.. Can anyone help me in simulating selective laser melting(SLM)/direct metal laser sintering(DMLS) of metal/alloy powder media in layer-by-layer fashion? IN...
View ArticleInternal error in geometry processing.
Internal error code is 5018. The error happened under the "Free Tetrahedral 1" category. Basically my model involves forced convection cooling on a flat plate, and the error pointed to the convective...
View ArticleMy biggest wish for X-mas: Solution for crack modeling
Dear Comsol gurus, dear support, my biggest wish for X-mas was, that the new 4.4 release would finally provide some reasonable approach for crack modeling as being standard in other software packages....
View Article