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arXiv · 1209.6078

Observation of temperature peaks due to strong viscous heating in a dusty plasma flow

Yan Feng·J. Goree·Bin Liu
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Abstract

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.

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Yan Feng, J. Goree, Bin Liu. 2012-09-26. Observation of temperature peaks due to strong viscous heating in a dusty plasma flow. https://doi.org/10.1103/physrevlett.109.185002

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