期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 477, 期 2, 页码 2766-2771出版社
OXFORD UNIV PRESS
DOI: 10.1093/mnras/sty642
关键词
accretion, accretion discs; hydrodynamics; methods: numerical
资金
- European Research Council (ERC) under the European Union's Horizon 2020 research and innovation program [681601]
- BIS National E-Infrastructure capital grant [ST/K000373/1]
- STFC DiRAC Operations grant [ST/K0003259/1]
- STFC [ST/R002363/1, ST/P002307/1, ST/M006948/1] Funding Source: UKRI
We describe a new implementation of the one-fluid method in the SPH code PHANTOM to simulate the dynamics of dust grains in gas protoplanetary discs. We revise and extend previously developed algorithms by computing the evolution of a new fluid quantity that produces a more accurate and numerically controlled evolution of the dust dynamics. Moreover, by limiting the stopping time of uncoupled grains that violate the assumptions of the terminal velocity approximation, we avoid fatal numerical errors in mass conservation. We test and validate our new algorithm by running 3D SPH simulations of a large range of disc models with tightly and marginally coupled grains.
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