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Validation Problem

Posted 23 nov. 2017, 02:21 UTC−5 Low-Frequency Electromagnetics 2 Replies

Khalid Ibrahim
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Hello dear colleagues, so I'm trying to make a simulation that is similar to the one in this paper by (N. Paudel and J. Bird) http://www.jpier.org/PIERB/pierb43/14.12072414.pdf

doing the same boundary conditions and material settings

the curves look the same but the values have some deficit (about 30 N) - the sim by the paper https://goo.gl/fFJwmN - my sim https://goo.gl/E515vb

What could be missing? I'm refining the mesh but it has no effect

2 Replies Last Post 28 nov. 2017, 17:21 UTC−5
Nirmal Paudel Tribhuvan University/Electrical Engineering
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Posted: 7 years ago 27 nov. 2017, 08:56 UTC−5

Hi Khalid,

Please refer to the following model file from the Application Gallery. This might not have exactly the same dimention or velocity/rotation, but should give you a good understanding of how to setup the COMSOL model for the electrodyanmic weel application. https://www.comsol.com/model/electrodynamic-wheel-magnetic-levitation-in-2d-44871

Good Luck. Nirmal Paudel

Hi Khalid, Please refer to the following model file from the Application Gallery. This might not have exactly the same dimention or velocity/rotation, but should give you a good understanding of how to setup the COMSOL model for the electrodyanmic weel application. https://www.comsol.com/model/electrodynamic-wheel-magnetic-levitation-in-2d-44871 Good Luck. Nirmal Paudel
Khalid Ibrahim
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Posted: 7 years ago 28 nov. 2017, 17:21 UTC−5

Many thanks for your time Dr. Nirmal, I have learned a lot from you.

1)Actually I was already using this model to help me setup my simulation. and the results are logical and close to the paper but as I said there's just some little differences (the paper gives Ft=110N, while mine gives Ft=85N) see the image here: https://goo.gl/Sg8CGB Could it be solver config changes? or something else?

2)The next step in my design I was going to do 3D analysis for EDW; but the rotating machinery in 3D doens't allow translational velocity (lorentz term). what could be an alternative solution? I'm limited to Vx=0m/s only.

Many thanks for your time Dr. Nirmal, I have learned a lot from you. 1)Actually I was already using this model to help me setup my simulation. and the results are logical and close to the paper but as I said there's just some little differences (the paper gives Ft=110N, while mine gives Ft=85N) see the image here: https://goo.gl/Sg8CGB Could it be solver config changes? or something else? 2)The next step in my design I was going to do 3D analysis for EDW; but the rotating machinery in 3D doens't allow translational velocity (lorentz term). what could be an alternative solution? I'm limited to Vx=0m/s only.

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