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Entropy 2006, 8(1), 25-30; doi:10.3390/e8010025
Article

Unsteady Volumetric Entropy Generation Rate in Laminar Boundary Layers

 and
Stokes Research Institute, Dept. of Mechanical and Aeronautical Engineering, University of Limerick, Ireland.
* Author to whom correspondence should be addressed.
Received: 26 August 2005 / Accepted: 3 February 2006 / Published: 6 February 2006
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Abstract

The prediction of the entropy generation rate in laminar shear layers is treated as steady, even in the presence of high levels of free stream turbulence. Here we highlight the deficiencies of this approach by quantifying the magnitude of entropy generation rate fluctuations in the laminar boundary layer subjected to free stream turbulence. We find fluctuation levels in excess of 100% in the near wall region, thereby indicating the need to account for the unsteadiness in laminar boundary layers subjected to free stream turbulence.
Keywords: laminar flow; unsteady entropy generation; dissipation coefficient. laminar flow; unsteady entropy generation; dissipation coefficient.
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.

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Walsh, E.J.; Hernon, D. Unsteady Volumetric Entropy Generation Rate in Laminar Boundary Layers. Entropy 2006, 8, 25-30.

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