期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 495, 期 4, 页码 3929-3934出版社
OXFORD UNIV PRESS
DOI: 10.1093/mnras/staa1366
关键词
hydrodynamics; methods: numerical; protoplanetary discs; dust, extinction
资金
- Australian Research Council [FT130100034, DP180104235]
- Australian government
- Swinburne University
- PNPS, PCMI of CNRS/INSU
- CNES, France [ANR-16-IDEX-0005]
- European Research Council (ERC) [864965]
- University of Lyon [ANR-16-IDEX-0005]
- European Research Council (ERC) [864965] Funding Source: European Research Council (ERC)
We present a fix to the overdamping problem found by Lathe & Price when simulating strongly coupled dust-gas mixtures using two different sets of particles using smoothed particle hydrodynamics. Our solution is to compute the drag at the barycentre between gas and dust particle pairs when computing the drag force by reconstructing the velocity field, similar to the procedure in Godunov-type solvers. This fixes the overdamping problem at negligible computational cost, but with additional memory required to store velocity derivatives. We employ slope limiters to avoid spurious oscillations at shocks, finding the van Leer Monotonized Central limiter most effective.
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