Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 443, Issue 1, Pages 927-945Publisher
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stu1173
Keywords
hydrodynamics; methods: numerical; planets and satellites: formation; protoplanetary discs; dust, extinction
Categories
Funding
- STFC [ST/J001627/1]
- Large Facilities Capital Fund of BIS
- University of Exeter Supercomputer
- University of Exeter
- STFC [ST/J001627/1, ST/H008535/1, ST/K000373/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/H008535/1, ST/J001627/1, ST/K000373/1] Funding Source: researchfish
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A method to avoid the explicit time integration of small dust grains in the two-fluid gas/dust smoothed particle hydrodynamics (SPH) approach is proposed. By assuming a very simple exponential decay model for the relative velocity between the gas and dust components, all the effective characteristics of the drag force can be reproduced. A series of tests has been performed to compare the accuracy of the method with analytical and explicit integration results. We find that the method performs well on a wide range of tests, and can provide large speed-ups over explicit integration when the dust stopping time is small. We have also found that the method is much less dissipative than conventional explicit or implicit two-fluid SPH approaches when modelling dusty shocks.
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