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

by Dr Pinghui Huang (University of Victoria, Canada)

Thursday 27 Jul 2023, 10:20 → 11:10 Asia/Shanghai

TDLI

Abstract

In recent years, ALMA discovered many protoplanetary disks with sub-structures in dust continuum and gas line observations. These sub-structures are believed in being 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.

Biography

2013-2019,  PhD in Planetary Science, Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences

2019-2022,  Postdoc Researcher, Institute for Advance Study, Tsinghua University

2023-now,   Postdoc Researcher, University of Victoria, Canada

Chair

Dong Lai

Division

Astronomy and Astrophysics

Other information

Venue: N601

Tencent Meeting: https://net.sjtu.edu.cn/info/1218/3042.htm
Meeting ID: 940 623 893