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Estimates of turbulent kinetic energy dissipation rate for a stratified flow in a wind tunnel

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  • Puhales, Franciano Scremin
  • Demarco, Giuliano
  • Martins, Luis Gustavo Nogueira
  • Acevedo, Otávio Costa
  • Degrazia, Gervásio Annes
  • Welter, Guilherme Sausen
  • Costa, Felipe Denardin
  • Fisch, Gilberto Fernando
  • Avelar, Ana Cristina

Abstract

In this work a method to estimate turbulent kinetic energy dissipation rate (TKEDR) was presented. The technique uses the second-order structure function and Kolmogorov’s law for inertial subrange. This methodology was applied on both neutral and stable stratification wind tunnel data, where the frozen turbulence hypothesis was assumed. The experiments were made with Reynolds Number ranging from 103 up to 104. The results show difference between the neutral and stable cases, but this gap decreases with the mean wind speed. Furthermore, TKEDR evaluated was used to describe the inertial subrange in the longitudinal velocity spectrum with a good agreement with the experimental data.

Suggested Citation

  • Puhales, Franciano Scremin & Demarco, Giuliano & Martins, Luis Gustavo Nogueira & Acevedo, Otávio Costa & Degrazia, Gervásio Annes & Welter, Guilherme Sausen & Costa, Felipe Denardin & Fisch, Gilberto, 2015. "Estimates of turbulent kinetic energy dissipation rate for a stratified flow in a wind tunnel," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 431(C), pages 175-187.
    • Handle: RePEc:eee:phsmap:v:431:y:2015:i:c:p:175-187
    DOI: 10.1016/j.physa.2015.03.008
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    1. Welter, Guilherme Sausen & Wittwer, Adrián Roberto & Degrazia, Gervásio Annes & Acevedo, Otávio Costa & de Moraes, Osvaldo Luiz Leal & Anfossi, Domenico, 2009. "Measurements of the Kolmogorov constant from laboratory and geophysical wind data," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 388(18), pages 3745-3751.
    2. Puhales, Franciano Scremin & Rizza, Umberto & Degrazia, Gervásio Annes & Acevedo, Otávio Costa, 2013. "A simple parameterization for the turbulent kinetic energy transport terms in the convective boundary layer derived from large eddy simulation," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 392(4), pages 583-595.
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    Cited by:

    1. Giuliano Demarco & Luis Gustavo Nogueira Martins & Bardo Ernst Josef Bodmann & Franciano Scremin Puhales & Otávio Costa Acevedo & Adrian Roberto Wittwer & Felipe Denardin Costa & Debora Regina Roberti, 2022. "Analysis of Thermal and Roughness Effects on the Turbulent Characteristics of Experimentally Simulated Boundary Layers in a Wind Tunnel," IJERPH, MDPI, vol. 19(9), pages 1-14, April.
    2. Razavi Dehkordi, Mohammad Hossein & Soltani, Mohammad Reza & Davari, Ali Reza, 2019. "Statistical analysis on the effect of reduced frequency on the aerodynamic behavior of an airfoil in dynamic physical motions," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 535(C).

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