Hostname: page-component-8448b6f56d-dnltx Total loading time: 0 Render date: 2024-04-19T23:43:32.234Z Has data issue: false hasContentIssue false
  • English
  • Français

Influence of timescale ratio on scalar flux relaxation: modelling Sirivat & Warhaft's homogeneous passive scalar fluctuations

Published online by Cambridge University Press:  21 April 2006

Tsan-Hsing Shih  and
John L. Lumley
Tsan-Hsing Shih
Affiliation:
Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, NY 14853, U.S.A.
John L. Lumley
Affiliation:
Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, NY 14853, U.S.A.
Get access Rights & Permissions [Opens in a new window]

Abstract

A second-order modelling technique is used to investigate the behaviour of homogeneous scalar turbulence. Special attention is paid to the influence of timescale ratio on scalar flux relaxation. We develop a model for the scalar flux equation in a homogeneous turbulence and consider both a scalar field without mean-scalar gradients and one with constant mean-scalar gradients based on Sirivat & Warhaft (1981) experiments. Good agreement with experiment in all the cases is obtained.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 162 , January 1986 , pp. 211 - 222
Copyright
© 1986 Cambridge University Press

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Lumley, J. L. 1978 Computational modeling of turbulent flows. Adv. Appl. Mech. 18, 123–176.Google Scholar
Lumley, J. L. 1983 Turbulence modeling. Trans. ASME E: J. Appl. Mech. 105, 1097–1103.Google Scholar
Newman, G. R., Launder, B. E. & Lumley, J. L. 1981 Modelling the behaviour of homogeneous scalar turbulence. J. Fluid Mech. 111, 217–232.Google Scholar
Sirivat, A. & Warhaft, Z. 1983 The effect of a passive cross-stream temperature gradient on the evolution of temperature variance and heat flux in grid turbulence. J. Fluid Mech. 128, 323–346.Google Scholar
Zema, N. O. & Lumley, J. L. 1979 Buoyancy effects in entraining turbulent boundary layers: a second-order closure study. In Turbulent Shear Flows I(ed. F. Durst, B. E. Launder, F. W. Schmidt & J. H. Whitelaw), pp. 295–305. Springer-Verlag.