Two-fluid dust and gas mixtures in smoothed particle hydrodynamics II: An improved semi-implicit approach
Bate, Matthew R.
Monthly Notices of the Royal Astronomical Society
Oxford University Press
© 2015 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society.
We present an improved version of the Lorén-Aguilar & Bate method to integrate the twofluid dust/gas equations that correctly captures the limiting velocity of small grains in the presence of net differences (excluding the drag force) between the accelerations of the dust and the gas. A series of accelerated DUSTYBOX tests and a simulation of dust-settling in a protoplanetary disc are performed comparing the performance of the new and old methods. The modified method can accurately capture the correct limiting velocity while preserving all the conservation properties of the original method.
European Research Council under the European Community’s Seventh Framework Programme
BIS National E-Infrastructure capital grant
STFC DiRAC Operations grant
This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society © 2015 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
Monthly Notices of the Royal Astronomical Society, 2015, Vol. 454, Issue 4, pp. 4114 - 4119
FP7/2007-2013 grant agreement no. 339248