# Conditions for Justifying Single-fluid Approximation for Charged and Neutral Dust Fluids and a Smoothed Particle Magnetohydrodynamics Method for Dust–Gas Mixture

@article{Tsukamoto2021ConditionsFJ,
title={Conditions for Justifying Single-fluid Approximation for Charged and Neutral Dust Fluids and a Smoothed Particle Magnetohydrodynamics Method for Dust–Gas Mixture},
author={Y. Tsukamoto and M. Machida and S. Inutsuka},
journal={The Astrophysical Journal},
year={2021},
volume={913}
}
• Published 2021
• Physics
• The Astrophysical Journal
We describe a numerical scheme for magnetohydrodynamics simulations of dust–gas mixture by extending smoothed particle magnetohydrodynamics. We employ the single-species particle approach to describe dust–gas mixture with several modifications from the previous studies. We assume that the charged and neutral dust can be treated as single-fluid, that the electromagnetic force acts on the gas, and that that acting on the charged dust is negligible. The validity of these assumptions in the context… Expand

#### References

SHOWING 1-10 OF 56 REFERENCES
The dynamics of charged dust in magnetized molecular clouds
• Physics
• 2017
We study the dynamics of large, charged dust grains in turbulent giant molecular clouds (GMCs). Massive dust grains behave as aerodynamic particles in primarily neutral dense gas, and thus are ableExpand
Is the dust-to-gas ratio constant in molecular clouds?
• Physics
• 2017
We perform numerical simulations of dusty, supersonic turbulence in molecular clouds. We model 0.1, 1 and 10 {\mu}m sized dust grains at an initial dust-to-gas mass ratio of 1:100, solving theExpand
Electric Charging of Dust Aggregates and its Effect on Dust Coagulation in Protoplanetary Disks
Mutual sticking of dust aggregates is the first step toward planetesimal formation in protoplanetary disks. In spite that the electric charging of dust particles is well recognized in some contexts,Expand
dustybox and dustywave: two test problems for numerical simulations of two‐fluid astrophysical dust–gas mixtures
• Physics
• 2011
In this paper we present the analytic solutions for two test problems involving two-fluid mixtures of dust and gas in an astrophysical context. The solutions provide a means of benchmarking numericalExpand
Two-Fluid Magnetohydrodynamic Simulations of Converging H I Flows in the Interstellar Medium. I. Methodology and Basic Results
• Physics
• 2008
We develop an unconditionally stable numerical method for solving the coupling between two fluids (frictional forces/heatings, ionization, and recombination), which can adequately solve the evolutionExpand
Dusty gas with SPH - II. Implicit timestepping and astrophysical drag regimes
• Physics
• 2011
In a companion paper (Laibe & Price 2011b), we have presented an algorithm for simulating two-fluid gas and dust mixtures in Smoothed Particle Hydrodynamics (SPH). In this paper, we develop anExpand
Three-fluid plasmas in star formation II. Momentum transfer rate coefficients
• Physics
• 2008
The charged component of the insterstellar medium consists of atomic and molecular ions, electrons, and charged dust grains, coupled to the local Galactic magnetic field. Collisions between neutralExpand
RAPID COAGULATION OF POROUS DUST AGGREGATES OUTSIDE THE SNOW LINE: A PATHWAY TO SUCCESSFUL ICY PLANETESIMAL FORMATION
• Physics
• 2012
Rapid orbital drift of macroscopic dust particles is one of the major obstacles to planetesimal formation in protoplanetary disks. We re-examine this problem by considering the porosity evolution ofExpand
The early evolution of viscous and self-gravitating circumstellar disks with a dust component
The long-term evolution of a circumstellar disk starting from its formation and ending in the T Tauri phase was simulated numerically with the purpose of studying the evolution of dust in the diskExpand
Dust coagulation and fragmentation in molecular clouds. I. How collisions between dust aggregates alter the dust size distribution
• Physics
• 2009
The cores in molecular clouds are the densest and coldest regions of the interstellar medium (ISM). In these regions ISM-dust grains have the potential to coagulate. This study investigates theExpand