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A smoothed particle hydrodynamics algorithm for multigrain dust with separate sets of particles

Abstract : We present a method for simulating the dynamics of a mixture of gas and multiple species of large Stokes number dust grains, typical of evolved protoplanetary discs and debris discs. The method improves upon earlier methods, in which only a single grain size could be represented, by capturing the differential backreaction of multiple dust species on the gas. This effect is greater for large dust-to-gas ratios that may be expected in the later stages of the protoplanetary disc life. We benchmark the method against analytic solutions for linear waves, drag, and shocks in dust-gas mixtures, and radial drift in a protoplanetary disc showing that the method is robust and accurate.
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Submitted on : Monday, June 27, 2022 - 8:30:56 AM
Last modification on : Wednesday, June 29, 2022 - 3:09:32 AM

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Daniel Mentiplay, Daniel J. Price, Christophe Pinte, Guillaume Laibe. A smoothed particle hydrodynamics algorithm for multigrain dust with separate sets of particles. Monthly Notices of the Royal Astronomical Society, 2020, 499, pp.3806-3818. ⟨10.1093/mnras/staa3171⟩. ⟨insu-03705163⟩

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