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Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.13/919265

Title: Inertial range similarity for velocity and scalar spectra in a turbulent channel flow
Author/Creator: Antonia, R. A.; Abe, H.
Institution: The University of Newcastle. Faculty of Engineering & Built Environment, School of Engineering
Description: Velocity and scalar spectra in a turbulent channel flow are examined using DNS databases with passive scalar transport (h⁺=180, 395, 640 and 1020 at Pr=0.71). Particular attention has been given to both kx and kz spectra in the outer region. In contrast to previous findings in the literature, the -5/3 power law does not hold for either velocity or scalar kx spectra over the present h⁺ range. For the kz spectrum, the scaling range slope of the θ spectrum is, however, closer to -5/3 than that of the u spectrum. This behaviour is most likely associated with large-scale spanwise mixing of θ.
Relation: 6th International Symposium on Turbulence, Heat and Mass Transfer (THMT '09). Turbulence, Heat and Mass Transfer 6: Proceedings of the Sixth International Symposium on Turbulence, Heat and Mass Transfer (Rome, Italy 14-18 September, 2009) p. 119-122
Relation: http://www.thmt-09.org
Date: 2009
Publisher: Begell House
Keyword(s): velocity spectra; scalar spectra; turbulent channel flow
Resource Type: conference paper
Identifier: http://hdl.handle.net/1959.13/919265
Identifier: ISBN:9781567002621

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