Wake turbulence observed behind an upstream "extra" particle in a complex (dusty) plasma
S. Zhdanov, C.-R. Du, M. Schwabe, V. Nosenko, H. M. Thomas, and G. E., Morfill
TL;DR
This study investigates the interaction of upstream particles with a complex plasma, revealing a novel turbulent wake with unique properties such as low thermal diffusivity and significantly higher particle temperature, differing from traditional Mach cone wakes.
Contribution
The paper reports the discovery of a new abnormal turbulent wake behind upstream particles in complex plasma, highlighting its distinct turbulence characteristics and thermal properties.
Findings
Discovery of a new abnormal turbulent wake behind upstream particles.
The wake exhibits anomalously low thermal diffusivity.
The wake's particle kinetic temperature is two orders of magnitude higher.
Abstract
An interaction of upstream extra particles with a monolayer highly-ordered complex plasma is studied. A principally new abnormal turbulent wake formed behind the supersonic upstream particle is discovered. An anomalous type of the turbulence wake clearly manifests in anomalously low thermal diffusivity and two orders of magnitude larger particle kinetic temperature compared to that of the 'normal' wake (Mach cone) observed by Du et al [Europhys. Lett. 99, 55001 (2012)].
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