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SUMMARY:Gas dynamics in outer regions of protoplanetary disk  - Can Cui - 
 DAMTP\, Cambridge
DTSTART:20210315T140000Z
DTEND:20210315T150000Z
UID:TALK154195@talks.cam.ac.uk
CONTACT:Cleo Loi
DESCRIPTION:While gas dynamics have been studied in local and global numer
 ical simulations for inner regions (&lt\;10AU) of protoplanetary disks (PP
 Ds)\, global simulations applicable to outer regions (&gt\;30AU) of PPDs a
 re still lacking. On the other hand\, it is revealed in the recent years t
 hat the magneto-rotational instability (MRI) is damped or suppressed in a 
 large part of the disk\, and hydrodynamic instabilities become crucial to 
 drive turbulence in PPDs. In this talk\, I will present our recent results
  on gas dynamics of outer PPDs through global 2D and 3D non-ideal MHD simu
 lations by Athena++\, focusing on the turbulence driven by Vertical Shear 
 Instability (VSI) - one of the most promising hydrodynamic instability in 
 PPDs - under the influence of the non-ideal MHD effects\, and the spontane
 ous magnetic flux concentration that leads to the formation of annular sub
 structures commonly detected with Atacama Large Millimeter/submillimeter A
 rray (ALMA).
LOCATION:Online
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