The role of Kelvin-Helmholtz instability in dusty and partially ionized outflows

TL;DR

This paper provides an analytical study of Kelvin-Helmholtz instability in partially ionized dusty outflows, revealing how magnetic fields and dust mass influence instability growth rates.

Contribution

It introduces a multifluid analytical model for Kelvin-Helmholtz instability in dusty, partially ionized outflows, highlighting effects of magnetic fields and dust properties.

Findings

Growth time decreases with increasing magnetic field strength.

Charged dust particles have a stabilizing effect.

Growth time increases with dust particle mass.

Abstract

We investigate the linear theory of Kelvin-Helmholtz instability at the interface between a partially ionized dusty outflow and the ambient material analytically. We model the interaction as a multifluid system in a planar geometry. The unstable modes are independent from the charge polarity of the dust particles. Although our results show a stabilizing effect for charged dust particles, the growth time scale of the growing modes gradually becomes independent of the mass or charge of the dust particles when the magnetic field strength increases. We show that growth time scale decreases with increasing the magnetic field. Also, as the mass of the dust particles increases, the growth time scale of the unstable mode increases.