TITLE:
Dust-Acoustic Solitary Waves in an Unmagnetized Dusty Plasma with Arbitrarily Charged Dust Fluid and Trapped Ion Distribution
AUTHORS:
O. Rahman, M. D. I. Bhuyan, M. M. Haider, J. Islam
KEYWORDS:
Dust-Acoustic Solitary Waves; Vortex-Like Distribution; Unmagnetized Dusty Plasma
JOURNAL NAME:
International Journal of Astronomy and Astrophysics,
Vol.4 No.1,
March
7,
2014
ABSTRACT: The nonlinear propagation
of dust-acoustic (DA) solitary waves in three-component unmagnetized dusty
plasma consisting of Maxwellian electrons, vortex-like (trapped) ions, and
arbitrarily charged cold mobile dust grain has been investigated. It has been
found that, owing to the departure from the Maxwellian ions distribution to a
vortex-like one, the dynamics of small but finite amplitude DA waves is
governed by a nonlinear equation of modified Korteweg-de Vries (mK-dV) type
instead of K-dV. The reductive perturbation method has been employed to study
the basic features (phase speed, amplitude, width, etc.) of DA solitary waves which are significantly modified by the
presence of trapped ions. The implications of our
results in space and laboratory plasmas are briefly discussed.