Lunch talk on Mar. 13, 2023

Implementation and Application of A Multifluid Dust Module in Athena++

Speaker: Pinghui Huang (University of Victoria)

Venue: Video Conference

Time: 12:30 PM, Monday, Mar. 13, 2023

Abstract: 

In recent years, ALMA discovered many protoplanetary disks with sub-structures in dust continuum and gas line observations. These sub-structures are believed to be tightly related to the planet formation and gas-dust interactions in disks. We have implemented a multifluid dust module in the Athena++ MHD code. The module can accommodate an arbitrary number of dust species interacting with the gas via aerodynamic drag, with a number of numerical solvers. In particular, we describe two second-order accurate, fully-implicit solvers that are stable in stiff aerodynamic drags between gas and dust. Moreover, we formulate a consistent treatment of dust concentration diffusion with dust back-reaction, which incorporates momentum diffusion and ensures Galilean invariance. This dust module is implemented to be compatible with most existing features of Athena++ and it will be particularly useful for studies of dust dynamics and planet formation in protoplanetary disks.

Report PPT:  SWIFAR_Pinghui Huang.pdf