Energy Transport in a Shear Flow of Particles in a 2D Dusty Plasma

Abstract

A shear flow of particles in a laser-driven two-dimensional (2D) dusty plasma are observed in a further study of viscous heating and thermal conduction. Video imaging and particle tracking yields particle velocity data, which we convert into continuum data, presented as three spatial profiles: mean particle velocity (i.e., flow velocity), mean-square particle velocity, and mean-square fluctuations of particle velocity. These profiles and their derivatives allow a spatially-resolved determination of each term in the energy and momentum continuity equations, which we use for two purposes. First, by balancing these terms so that their sum (i.e., residual) is minimized while varying viscosity $\eta$ and thermal conductivity $\kappa$ as free parameters, we simultaneously obtain values for $\eta$ and $\kappa$ in the same experiment. Second, by comparing the viscous heating and thermal conduction terms, we obtain a spatially-resolved characterization of the viscous heating.

11 pages, 9 figures, Physical Review E in press (2012)

References in corpus (8)

• Accurate particle position measurement from images
• Crystallization dynamics of a single layer complex plasma
• Shear zones and wall slip in the capillary flow of concentrated colloidal suspensions
• Viscoelasticity of 2D liquids quantified in a dusty plasma experiment
• Observation of temperature peaks due to strong viscous heating in a dusty plasma flow
• Time correlation functions and transport coefficients of two-dimensional Yukawa liquids
• Evolution of shear-induced melting in dusty plasma
• Superdiffusion in quasi-two-dimensional Yukawa liquids

Cited by in corpus (9)

• Superdiffusion of 2D Yukawa liquids due to a perpendicular magnetic field
• Longitudinal viscosity of 2D Yukawa liquids
• A review on the Vortex and Coherent Structures in Dusty Plasma Medium
• Shock width measured under liquid and solid conditions in a 2D dusty plasma
• Heat Transport in Confined Strongly Coupled 2D Dust Clusters
• Oscillation-like diffusion of two-dimensional liquid dusty plasmas on one-dimensional periodic substrates with varied widths
• Asymmetry of steady state current fluctuations in nonequilibrium systems
• Observation of fast sound in two-dimensional dusty plasma liquids
• Heat transport in a flowing complex plasma in microgravity conditions