Observation of Temperature Peaks due to Strong Viscous Heating in a Dusty Plasma Flow

被引：82

作者：

Feng, Yan ^{[1
]}

Goree, J. ^{[1
]}

Liu, Bin ^{[1
]}

机构：

[1] Univ Iowa, Dept Phys & Astron, Iowa City, IA 52242 USA

来源：

PHYSICAL REVIEW LETTERS | 2012年 / 109卷 / 18期

基金：

美国国家科学基金会;

关键词：

CRYSTALS; NUMBER;

D O I：

10.1103/PhysRevLett.109.185002

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Profound temperature peaks are observed in regions of high velocity shear in a 2D dusty plasma experiment with laser-driven flow. These are attributed to viscous heating, which occurs due to collisional scattering in a shear flow. Using measurements of viscosity, thermal conductivity, and spatial profiles of flow velocity and temperature, we determine three dimensionless numbers: Brinkman, Br = 0.5; Prandtl, Pr = 0.09; and Eckert, Ec = 5.7. The large value of Br indicates significant viscous heating that is consistent with the observed temperature peaks.

引用

页数：5

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