Reynolds number effects on the Reynolds-stress budgets in turbulent channels

Hoyas, Sergio and Jiménez Sendín, Javier (2008). Reynolds number effects on the Reynolds-stress budgets in turbulent channels. "Physics of Fluids", v. 20 (n. 10); pp.. ISSN 1070-6631. https://doi.org/10.1063/1.3005862.

Description

Title: Reynolds number effects on the Reynolds-stress budgets in turbulent channels
Author/s:
  • Hoyas, Sergio
  • Jiménez Sendín, Javier
Item Type: Article
Título de Revista/Publicación: Physics of Fluids
Date: October 2008
ISSN: 1070-6631
Volume: 20
Subjects:
Freetext Keywords: Raynolds, turbulence, wall-parallel large-scale motions, scaling of the pressure, viscous sublayer
Faculty: E.T.S.I. Aeronáuticos (UPM)
Department: Motopropulsión y Termofluidodinámica [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

Budgets for the nonzero components of the Reynolds-stress tensor are presented for numerical channels with Reynolds numbers in the range Reτ ≤180–2000. The scaling of the different terms is discussed, both above and within the buffer and viscous layers. Above (x_2^+)≈150, most budget components scale reasonably well with u_t^3/h, but the scaling with (u_t^4)/v is generally poor below that level. That is especially true for the dissipations and for the pressure-related terms. The former is traced to the effect of the wall-parallel large-scale motions, and the latter to the scaling of the pressure itself. It is also found that the pressure terms scale better near the wall when they are not separated into their diffusion and deviatoric components, but mostly only because the two terms tend to cancel each other in the viscous sublayer. The budgets, together with their statistical uncertainties, are available electronically from http://torroja.dmt.upm.es/channels.

More information

Item ID: 2835
DC Identifier: http://oa.upm.es/2835/
OAI Identifier: oai:oa.upm.es:2835
DOI: 10.1063/1.3005862
Official URL: http://pof.aip.org/phfle6/v20/i10
Deposited by: Memoria Investigacion
Deposited on: 23 Apr 2010 12:02
Last Modified: 20 Apr 2016 12:28
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