MULTIGRAIN: A smoothed particle hydrodynamic algorithm for multiple small dust grains and gas

Mark Hutchison; Daniel J. Price; Guillaume Laibe

doi:10.1093/mnras/sty367

MULTIGRAIN: A smoothed particle hydrodynamic algorithm for multiple small dust grains and gas

Mark Hutchison, Daniel J. Price, Guillaume Laibe

School of Physics and Astronomy

Research output: Contribution to journal › Article › Research › peer-review

35 Citations (Scopus)

Abstract

We present a new algorithm, MULTIGRAIN, for modelling the dynamics of an entire population of small dust grains immersed in gas, typical of conditions that are found in molecular clouds and protoplanetary discs. The MULTIGRAIN method is more accurate than single-phase simulations because the gas experiences a backreaction from each dust phase and communicates this change to the other phases, thereby indirectly coupling the dust phases together. The MULTIGRAIN method is fast, explicit and low storage, requiring only an array of dust fractions and their derivatives defined for each resolution element.

Original language	English
Pages (from-to)	2186-2198
Number of pages	13
Journal	Monthly Notices of the Royal Astronomical Society
Volume	476
Issue number	2
DOIs	https://doi.org/10.1093/mnras/sty367
Publication status	Published - 11 May 2018

Keywords

Dust
Extinction
Hydrodynamics
ISM: kinematics and dynamics
Methods: numerical
Protoplanetary discs

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10.1093/mnras/sty367

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abstract = "We present a new algorithm, MULTIGRAIN, for modelling the dynamics of an entire population of small dust grains immersed in gas, typical of conditions that are found in molecular clouds and protoplanetary discs. The MULTIGRAIN method is more accurate than single-phase simulations because the gas experiences a backreaction from each dust phase and communicates this change to the other phases, thereby indirectly coupling the dust phases together. The MULTIGRAIN method is fast, explicit and low storage, requiring only an array of dust fractions and their derivatives defined for each resolution element.",

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AU - Laibe, Guillaume

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AB - We present a new algorithm, MULTIGRAIN, for modelling the dynamics of an entire population of small dust grains immersed in gas, typical of conditions that are found in molecular clouds and protoplanetary discs. The MULTIGRAIN method is more accurate than single-phase simulations because the gas experiences a backreaction from each dust phase and communicates this change to the other phases, thereby indirectly coupling the dust phases together. The MULTIGRAIN method is fast, explicit and low storage, requiring only an array of dust fractions and their derivatives defined for each resolution element.

KW - Dust

KW - Extinction

KW - Hydrodynamics

KW - ISM: kinematics and dynamics

KW - Methods: numerical

KW - Protoplanetary discs

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JF - Monthly Notices of the Royal Astronomical Society

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MULTIGRAIN: A smoothed particle hydrodynamic algorithm for multiple small dust grains and gas

Abstract

Keywords

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