Unsteady Volumetric Entropy Generation Rate in Laminar Boundary Layers

doi:10.3390/e8010025

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

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Unsteady Volumetric Entropy Generation Rate in Laminar Boundary Layers

E. J. Walsh and D. Hernon

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.

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Cite This Article

MDPI and ACS Style

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

AMA Style

Walsh E.J., Hernon D. Unsteady Volumetric Entropy Generation Rate in Laminar Boundary Layers. Entropy. 2006; 8(1):25-30.

Chicago/Turabian Style

Walsh, E. J.; Hernon, D. 2006. "Unsteady Volumetric Entropy Generation Rate in Laminar Boundary Layers." Entropy 8, no. 1: 25-30.

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