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Unsteady Volumetric Entropy Generation Rate in Laminar Boundary Layers

Stokes Research Institute, Dept. of Mechanical and Aeronautical Engineering, University of Limerick, Ireland.
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Entropy 2006, 8(1), 25-30; https://doi.org/10.3390/e8010025
Received: 26 August 2005 / Accepted: 3 February 2006 / Published: 6 February 2006
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. View Full-Text
Keywords: laminar flow; unsteady entropy generation; dissipation coefficient. laminar flow; unsteady entropy generation; dissipation coefficient.
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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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