Enforcing dust mass conservation in 3D simulations of tightly coupled grains with the Phantom SPH code

2018/03/08 by Giulia Ballabio, Giovanni Dipierro, Benedetta Veronesi +4 · 38 citations
Engineering · Physics and Astronomy · #Aerospace engineering #Astro and Planetary Science #Astrophysics and Star Formation Studies #Classical mechanics #Code (set theory) #Computational physics #Conservation of mass #Fluid Dynamics Simulations and Interactions #Imaging phantom #Limiting #Mechanics #Optics #Physics #Range (aeronautics) #Smoothed-particle hydrodynamics #Statistical physics #astro-ph.EP

paper · pdf · doi:10.1093/mnras/sty642

published in Monthly Notices of the Royal Astronomical Society 477(2), 2766-2771 (Oxford University Press) · 6 pages, 3 figures

arxiv created 2018/03/08 · openalex publication_date 2018/03/16 · arxiv updated 2018/03/28 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

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.

Citations

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