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SUMMARY:The Sub-grid scale gradient model: a numerical technique for accur
 ate MHD Large Eddy simulations (Contributed speaker) - Daniele Viganò (In
 stitute of Space Sciences  (CSIC))
DTSTART:20220916T124500Z
DTEND:20220916T133000Z
UID:TALK177533@talks.cam.ac.uk
DESCRIPTION:In many astrophysical MHD contexts\, the computational feasibi
 lity of covering all the scales of interest (from the dominion size down t
 o the dissipative scales) is and will be many orders of magnitude away fro
 m what would be ideally needed. Large eddy simulations are used to partial
 ly compensate such lack of numerical resolution\, introducing sub-grid-sca
 le models. I present our compressible MHD extension of the so-called gradi
 ent model\, that can be implemented for any problem\, equation of state\, 
 in relativistic and non-relativistic cases. I show the breakthrough result
 s of our main application so far\, the magnetic amplification during merge
 rs\, and we can all discuss possible direct applications to planetary dyna
 mo codes.
LOCATION:Seminar Room 1\, Newton Institute
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