Previous reviews of the behavior of passive scalars which are convected and mixed by turbulent flows have focused primarily on the case when the Prandtl number Pr, or more generally, the Schmidt number Sc is around 1. The present review considers the extra effects which arise when Sc differs from 1. It focuses mainly on information obtained from direct numerical simulations of homogeneous isotropic turbulence which either decays or is maintained in steady state. The first case is of interest since it has attracted significant theoretical attention and can be related to decaying turbulence downstream of a grid. Topics covered in the review include spectra and structure functions of the scalar, the topology and isotropy of the small-scale scalar field, as well as the correlation between the fluctuating rate of strain and the scalar dissipation rate. In each case, the emphasis is on the dependence with respect to Sc. There are as yet unexplained differences between results on forced and unforced simulations of homogeneous isotropic turbulence. There are 144 references cited in this review article.
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November 2003
Review Articles
Effect of Schmidt number on small-scale passive scalar turbulence
RA Antonia,
RA Antonia
Discipline of Mechanical Engineering, University of Newcastle, NSW, 2308, Australia
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P Orlandi
P Orlandi
Dipartimento di Meccanica e Aeronautica, Universita Degli Studi di Roma “La Sapienza,” 00184 Rome, Italy
Search for other works by this author on:
RA Antonia
Discipline of Mechanical Engineering, University of Newcastle, NSW, 2308, Australia
P Orlandi
Dipartimento di Meccanica e Aeronautica, Universita Degli Studi di Roma “La Sapienza,” 00184 Rome, Italy
Appl. Mech. Rev. Nov 2003, 56(6): 615-632 (18 pages)
Published Online: November 26, 2003
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Online:
November 26, 2003
Citation
Antonia , R., and Orlandi , P. (November 26, 2003). "Effect of Schmidt number on small-scale passive scalar turbulence ." ASME. Appl. Mech. Rev. November 2003; 56(6): 615–632. https://doi.org/10.1115/1.1581885
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