How to export the mesh nodal reaction forces?
Hi everyone, I'm using the comsol to solve the petroleum geomechanical problem. Now I want to use the mesh nodal reaction forces to balance the initial stress. but I don't know how to restrain the mesh...
View ArticleI have a question on simulation magnetic field
hi everyone, I am recently using this software and I want to simulate a magnetic field around 200-turn coil with different core shapes. but there is always an internal error 900 I did with all kinds of...
View ArticleClearences in a magnet
Hello, I have a model for a dipole magnet, and of course I want to simulate its magnetic field. I have a single-turn coil in the iron yoke. It is a septum magnet for particle accelerators, so I am...
View Articleinduction voltage between 3 electrode
hello i want to simulate a model that has 3 electrodes . i want to apply a voltage to 1st electrode and by electric induction between this 3 electrode that are arranged in tandem , measure induced...
View ArticleExport Data and read triangular mesh into e.g. Matlab?
Hi, I want to do analysis on a 2D electrostatic comsol solution in matlab. We don't have the LiveLink license and will probably not get it in the near future. I am doing: Results / Export / Data, and...
View ArticleModelling the magentic field
Hi Zsolt, Welcome to the COMSOL community - if you are new to COMSOL, we are ready to help you. I think there could be a very simple trick to mesh your geometry, but we would probably need to see the...
View ArticleProblem regarding meshing in MEMS accelerometers
when we are joining a beam with a mass we are getting problems regarding its boundary that is some of the boundaries are shown not applicable due to this we are getting meshing problems .so kindly reply
View Articleoptimising solution methods in parametric sweeps. newton step suddenly going...
I sometimes have my computations converging reasonably but then suddenly one step completely changes the picture and the error drastically increases, almost as if a calculation error had been made,...
View Articleneed help
hi I want to simulate magnetic field around a multi turn coil with different core shapes. please help mee
View ArticleMeshing of boundary layers wont work
I am trying to mesh (and, eventually, compute) a model of a rectangular duct connected to a circular hole, where the duct and the lower part of the hole are filled with water, the upper part of the...
View ArticleCFD, wall lift-off and the Boundary Layer attribute
This question comes from my poor understanding of the "boundary layer" tool in the mesher. 1. It appears that these "boundary layers" are one technique to ensure that "wall lift-off" is of the proper...
View ArticleBuoyancy Force
Hello everyone, I know that there was a discussion about buoyancy forces acting on a rigid body but i spent some time for solving this problem and I will appreciate if you help me about my situation....
View ArticleMeshing problem
Hello I am currently encountering following Problem. I have been modelling a cable in ground. In order to calculate my results faster I have been modelling the cable only over a distance of 0.1[m]. Now...
View ArticleMeshing 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 Articledeformed geometry for Electromagnets
hi every one , i defined a moving armature by using deformed geometry in AD\DC module .also auto Remeshing defined .when the distortion exceed from 1 ,comsol remesh geometry again . but after three...
View ArticleBAW Resonator Mesh
Hai I am designing a AlN BAW resonator operating at 3GHz. It is being observed that the frequency response changes widely with the mesh density. The mesh criteria of the mesh size being between...
View ArticleElectrostatic Precipitator... Help!!
Hello I want to simulate an Electrostatic Precipitator. In conditions of laminar flow field and electric filed, it is requierd how many particles are gathered. However, in my simulation, the efficiency...
View Articlehemispherical indentation of graphene with prescribed displacement
Hi, I am trying to simulate the spherical indentation of a cylindrical film with very thin thickness (3.35 angstrom) and a radius of um. The film is fixed at the edges. In order to achieve this, I used...
View ArticleConvergence versus meshing granularity
I have noticed interesting behaviour in my models. If the model will solve using a coarser mesh, it may not solve well using a finer mesh. And although use of the boundary layer tool can reduce the...
View Articleperistaltic pump
Hello, I have some question about peristaltic pump the model Comsol, "peristaltic_pump.mph (Model Library Path: COMSOL_Multiphysics / Multiphysics / peristaltic_pump) ". (a) The Comsol use this...
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