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TFDzarm / picFoam

GNU General Public License v3.0
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Could picFoam use spatially nonuniform magnetic field? #1

Closed PengChen2016 closed 3 years ago

PengChen2016 commented 3 years ago

Thanks for your open source work! picFoam supports a stationary magnetic field / a constant magnetic field now [1]. Whether B is constant only in time, or const both in time and space? If picFoam of the current version does not support a spatially non-uniform static magnetic field, do you have a plan to support it? Since I have little knowledge about openFoam, could you please tell me the possible difficulties in enabling picFoam to support non-uniform magnetic fields? We would like to fork this repository and have a try in the second half of this year if you do not have the plan. (I have the knowledge about ES-PIC/MCC algorithm and code.)

[1] Kühn, Christoph, and Rodion Groll. "picFoam: An OpenFOAM based electrostatic Particle-in-Cell solver." Computer Physics Communications 262 (2021): 107853.

chriskuehn commented 3 years ago

Sorry, didn't see this up until now. B is only stationary in time. You can define any spatial non-uniform field you like. OpenFOAM has a solver called magneticFoam with which its possible to generate magnetic fields from permanent magnets. Sadly there is no tutorial for it in the OpenFOAM repo, but here is a discussion about its usage: https://www.cfd-online.com/Forums/openfoam-solving/95146-magneticfoam.html It is possible to map the B field calculated by magneticFoam to picFoam using the application mapFields (it included with OpenFOAM). There also tools like setFields which can be used to predefine a field.

PengChen2016 commented 3 years ago

Thank you very much!