Modeling circular Halbach array
Hello, I am new to COMSOL and would like to model a Halbach array and corresponding forces on ferromagnetic particles. The magnets in the array are square but pointing in various angles - how do I...
View ArticleCorrosion in GlassFRP bar (non-metallic)
I am relatively new to COMSOL and want to model corrosion in Glass Fiber Reinforced Polymer bar that is kept in a still alkaline solution for certain time. With passing time, gel is formed inside the...
View ArticleHow to use boundary mode analysis in transient of RFmodule？
I made a waveguide before by using boundary mode analysis in frequency domain of RF module.Now, i want to make this waveguide by using transient of RFmodule.But there is no boundary mode analysis in...
View ArticleError in Thermoviscous Acoustics: Undefined variable. - Variable:...
Hello,I am trying to calculate the input impedance of an open tube, so that the viscous and thermal losses due to the boundary layer are included, using the Thermoviscous Acoustics module. The input to...
View ArticleSimulating permanent magnet
I am trying to simulate a permanent magnet block of iron, within a block of air. I defined the iron to have a ramenant flux density of 0.5 T in all directions and added magnetic insulation for all air...
View ArticleMs. Binu
I am able to export only a tiny portion of my geometry into dxf when opened using CorelDraw. My geometry is a spiral structure created using parametric curves. I need to export the geometry to actual...
View ArticleAdditive Manufacturing
How to build a time dependent geometry for Additive Manufacturing? Or simply how to add layers and simulate with a moving heat source?
View ArticleLicense problem in Linux
Hi, there is error of the comsol when I try to launch the comsol?15:04:08 (lmgrd) Starting vendor daemons ... 15:04:08 (lmgrd) Starting vendor daemon at port 1718 15:04:08 (lmgrd) Using vendor daemon...
View ArticleUtilizing a deforming geometry in a capacitor model
Greetings,I am working on a model of a capacitive displacement sensor. The terminal plates remain fixed while the ground plate is allowed to displace. At the nominal position, there is an equal overlap...
View ArticleHow to add 2D image from MATLAB to COMSOL as a geometry?
Hi all,I have an 2D image with a size of 512x512. It's a section image from a CT image as DICOM. I converted it to .mat file by using dicomread() function in MATLAB. After that i want to import it as a...
View ArticleInserting Sphere Particle 3D Simulation Problem
HiI am trying to model 3D laminar flow in T connection, as shown in attached pdf, in which the flow in one of the T branches is partially obstructed by a spherical obstacle. The question is, How I can...
View ArticleLockup table in thermometric model
Dear Colleagues, Greeting, I'm Samar Akef, I need your help for adding a lockup table in thermoelectric model, how can i get the relation between the temperature and each of the following: 1-Seebeck...
View ArticleSetting angle of incident Gaussian beam
Hello,From this example model,https://www.comsol.com/model/nanorods-14693we learn how to introduce a Gaussian beam into the model in the x or y directions. How does one modify this to include arbitrary...
View ArticleDeformation of oil droplets in water caused by pressure variation
Hi everyone,I am trying to build a model in which a drop of oil in water (emulsion) is subject to cyclical pressure variations (for example, sinusoidal). The final aim is to show the deformation of the...
View ArticleMaximum operator in a specific domain
The below post is related to an archived discussionHI, I am trying to get the maximum value for the mechanical stress in a certain domain of my geometry (Let's say domain 2, should be around 45 MPa),...
View ArticleHow to specify initial coil current in Electric Circuit + Magnetic fields
Hello, I want to simulate the decay of the current in a coil from an initial state. The coil is connected to an external resistor.The initial state has been simulated in a stationary solution, with a...
View ArticleWay to represent acoustic dissipation in time domain?
Hi,I have a system which takes advantage of the inherient loss in the system. The simulation result is quite good in frequency domain. And the system inherient loss is modeled by assigning a complex...
View ArticleEmission Spectra
Dear All, I would like to know how to plot Emission Spectra (Emitted intensity versus wave-length) for thermal radiation in Heat Transfer Module and for emitted rays in Ray Optic Module? Best wishes,...
View ArticlePrescribed Displacement or Fixed Constraint
Hello, I'm using Comsol Multiphysics for my master thesis to realize a breast model. Now I'm studying the effects of the gravity load on the breast tissues, but I have some problems to reproduce the...
View Articlemaxwell stress tensor in RF module
Hello allI want to use maxwell stress tensor it in RF module to calculate the force on a dielectric particle above a surface, The particle is illuminated with a planewave. I already did the calcuation...
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