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Entropy 2017, 19(6), 278; doi:10.3390/e19060278

Entropy Generation Rates through the Dissipation of Ordered Regions in Helium Boundary-Layer Flows

Department of Mechanical Engineering, University of Utah, Salt Lake City, UT 84112, USA
Received: 23 March 2017 / Revised: 9 June 2017 / Accepted: 12 June 2017 / Published: 15 June 2017
(This article belongs to the Special Issue Entropy in Computational Fluid Dynamics)
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Abstract

The results of the computation of entropy generation rates through the dissipation of ordered regions within selected helium boundary layer flows are presented. Entropy generation rates in helium boundary layer flows for five cases of increasing temperature and pressure are considered. The basic format of a turbulent spot is used as the flow model. Statistical processing of the time-dependent series solutions of the nonlinear, coupled Lorenz-type differential equations for the spectral velocity wave components in the three-dimensional boundary layer configuration yields the local volumetric entropy generation rates. Extension of the computational method to the transition from laminar to fully turbulent flow is discussed. View Full-Text
Keywords: helium boundary layers; turbulent spots; spectral ordered regions; entropy generation rates helium boundary layers; turbulent spots; spectral ordered regions; entropy generation rates
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Isaacson, L.K. Entropy Generation Rates through the Dissipation of Ordered Regions in Helium Boundary-Layer Flows. Entropy 2017, 19, 278.

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