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Conditionally-sampled turbulent and nonturbulent measurements of entropy generation rate in the transition region of boundary layers

Publication ,  Journal Article
Walsh, EJ; Nolan, KP; McEligot, DM; Volino, RJ; Bejan, A
Published in: Journal of Fluids Engineering, Transactions of the ASME
May 1, 2007

Conditionally-sampled boundary layer data for an accelerating transitional boundary layer have been analyzed to calculate the entropy generation rate in the transition region. By weighing the nondimensional dissipation coefficient for the laminar-conditioned-data and turbulent-conditioned-data with the intermittency factor γ the average entropy generation rate in the transition region can be determined and hence be compared to the time averaged data and correlations for steady laminar and turbulent flows. It is demonstrated that this method provides, for the first time, an accurate and detailed picture of the entropy generation rate during transition. The data used in this paper have been taken from detailed boundary layer measurements available in the literature. This paper provides, using an intermittency weighted approach, a methodology for predicting entropy generation in a transitional boundary layer. Copyright © 2007 by ASME.

Duke Scholars

Published In

Journal of Fluids Engineering, Transactions of the ASME

DOI

ISSN

0098-2202

Publication Date

May 1, 2007

Volume

129

Issue

5

Start / End Page

659 / 664

Related Subject Headings

  • Mechanical Engineering & Transports
  • 40 Engineering
  • 09 Engineering
 

Citation

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ICMJE
MLA
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Walsh, E. J., Nolan, K. P., McEligot, D. M., Volino, R. J., & Bejan, A. (2007). Conditionally-sampled turbulent and nonturbulent measurements of entropy generation rate in the transition region of boundary layers. Journal of Fluids Engineering, Transactions of the ASME, 129(5), 659–664. https://doi.org/10.1115/1.2717622
Walsh, E. J., K. P. Nolan, D. M. McEligot, R. J. Volino, and A. Bejan. “Conditionally-sampled turbulent and nonturbulent measurements of entropy generation rate in the transition region of boundary layers.” Journal of Fluids Engineering, Transactions of the ASME 129, no. 5 (May 1, 2007): 659–64. https://doi.org/10.1115/1.2717622.
Walsh EJ, Nolan KP, McEligot DM, Volino RJ, Bejan A. Conditionally-sampled turbulent and nonturbulent measurements of entropy generation rate in the transition region of boundary layers. Journal of Fluids Engineering, Transactions of the ASME. 2007 May 1;129(5):659–64.
Walsh, E. J., et al. “Conditionally-sampled turbulent and nonturbulent measurements of entropy generation rate in the transition region of boundary layers.” Journal of Fluids Engineering, Transactions of the ASME, vol. 129, no. 5, May 2007, pp. 659–64. Scopus, doi:10.1115/1.2717622.
Walsh EJ, Nolan KP, McEligot DM, Volino RJ, Bejan A. Conditionally-sampled turbulent and nonturbulent measurements of entropy generation rate in the transition region of boundary layers. Journal of Fluids Engineering, Transactions of the ASME. 2007 May 1;129(5):659–664.

Published In

Journal of Fluids Engineering, Transactions of the ASME

DOI

ISSN

0098-2202

Publication Date

May 1, 2007

Volume

129

Issue

5

Start / End Page

659 / 664

Related Subject Headings

  • Mechanical Engineering & Transports
  • 40 Engineering
  • 09 Engineering