[Please help] Magnetic-structural coupled analysis, result not good,model...
This is part of my thesis. I'm trying to simulate the magneto-structural coupled analysis on a magnetic gear. The attached file is partial of the model. If you have any advice, please see the model and...
View ArticleUsing a Gaussian Pulse
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Hi all, I am trying to measure the bulk temperature, but initial testing on the conservation of mass failed as it gave me different results between the inlet and the outlet mass flux. This result makes...
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Hi I am facing problem in assigning port parameters for semicircular coaxial cable excitation. If it is circular then can use coaxial port type also if rectangular coaxial port we can use rectangular...
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Hi, I want to simulate the movement of a cloud of electrons in an electric field, through a semi-conductor material. I used the COMSOL Electrostatics module to calculate the electric fieldlines. Now, I...
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Hi everybody, I have recently started a bioinformatics project at university. It is about cooperation of bacteria so I want to deal with a large number (1000+) of objects in medium producing proteins...
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Hi I am new to PML. I am using Structural mechanics module to implement PML in a cantliver to determine the waves propagating to the PML. I am getting this error: Could not find any cartesian regions....
View ArticleProperties of N- Octadecane on Comsol thermal
Hello, I with the test similer Comsol software equation heat transfer of a brick containing a phase change material (N-0ctadecane) under varying conditions. I want help on how to report the...
View ArticleHow to set boundary conditions?
I'm new to COMSOL. Where can I find the options for setting up boundary conditions for a model? I need scattering boundary.
View Articledefining output variable of an interface as dependent variable in global...
I am trying to simulate surface deformation due to magnetic field. My model consists of a cylinder filled with conductive fluid surrounded by a single coil (approximated by a line element). I coupled...
View ArticleTwo-phase flow physics
Hi there, I have experience dealing with CFD problems with the finite volume method. I use my own code, starccm+ and openFOAM very often. I am trying to make some animations with a multiphase flow for...
View Articlemodeling of Diffusion
Hi, I want to model a simple mass diffusion process, but with a concentration dependent diffusion coefficient. In variable I defined a function for diffusion coefficient. but when I want to solve the...
View ArticleMeshing problem for coaxial cable with helical inner conductor
Hi Good day. I am using a coaxial geometry which has helical inner conductor and cylindrical outer conductor. I am also using emw physics.while simulating/mesh generating I am getting error which...
View Articlevertical exaggeration
Hi all, I'm trying to change the views of my 2D plot in order to have a vertical exaggeration (1:4). I've tried to play with the lock aspect ratio but it seems the model is squeezed into a cube-like...
View ArticlePrescribe number of Meshing Elements
Good day, for a model of simple geometry (sphere) and fixed volume, is there a way to define a specific number of meshing elements? I am trying to solve my system with a specific number of elements and...
View Articleelectrohydrodynamic problem
Hi all, I'm currently simulating the electromechanical effects of water droplets under both AC and DC voltages. The water droplet is placed between an energized and grounded electrode on an insulating...
View ArticleGeneration of thicker boundary layer mesh
Hello guys I wanna make some think boundary layer meshes. In my simulation, the boundary layer thickness delta is so big in that Re_x = 9.8 and delta = 5.0x/sqrt(Re_x). So I think the boundary layer...
View ArticlePermanent magnet machine modelling!
I am simulating a permanent magnet generator, in 2D Comsol, 'emqa', 'ALE' mode. But there is a problem concerning magnetic circuit saturation as the followings: - My programs are convergent with linear...
View ArticleHow to find what "compute differential" documentation
When I am plotting a Nyquist plot, I came across this option "Compute differential" under "Expression evaluated for:" option. I just don't know what this means. But instead of asking what it is, I want...
View ArticleError: 'Non Linear Solver did not converge'
Hi, I am working a a 2D model of a rotating machine. I am using the material soft iron (without losses) from the ACDC material library. Every time I use the HB curve as the magnetic field constitutive...
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