284 1 archive 1 disk0/00/00/02/84 2005-05-17 2008-07-05 02:53:39 2008-07-05 02:53:39 article show 0 Dimotakis Paul E. Dimotakis-P-E Turbulent mixing pub cls public turbulence, entrainment, scalar dispersion, diffusion, reacting flow "Reprinted, with permission, from the Annual Review of Fluid Mechanics, Volume 37 copyright 2005 by Annual Reviews, www.annualreviews.org" Support for this reviewbyAFOSRGrants F49620–01–1–0006 and FA9550–04–1–0020, the DOE/Caltech ASCI/ASAP subcontract B341492, and the Caltech John K. Northrop Chair is gratefully acknowledged. I would also like to acknowledge both recent and previous discussions with and assistance by J. Adkins and W.R.C. Phillips on ocean mixing; D. Arnett, H. Bethe, and R. Lovelace on astrophysics and supernova explosions; J.E. Broadwell and M.G. Mungal on passive-scalar mixing; A.W. Cook, T.W. Mattner, D.I. Meiron, and P.L. Miller on RTI flow; H.J.S. Fernando, A. Mahalov, and J. Riley on mixing in stably stratified flows; H. Lam on scalar transport and diffusion; H.W. Liepmann on turbulence; C. Pantano on mixing and combustion dynamics; T.W. Mattner and D.I. Pullin on sub-grid scale modeling; and R.A. Shaw on particle and cloud dynamics; as well as assistance with the text by J.M. Bergthorson and D.I. Pullin. The ability of turbulent flows to effectively mix entrained fluids to a molecular scale is a vital part of the dynamics of such flows, with wide-ranging consequences in nature and engineering. It is a considerable experimental, theoretical, modeling, and computational challenge to capture and represent turbulent mixing which, for high Reynolds number (Re) flows, occurs across a spectrum of scales of considerable span. This consideration alone places high-Re mixing phenomena beyond the reach of direct simulation, especially in high Schmidt number fluids, such as water, in which species diffusion scales are one and a half orders of magnitude smaller than the smallest flow scales. The discussion below attempts to provide an overview of turbulent mixing; the attendant experimental, theoretical, and computational challenges; and suggests possible future directions for progress in this important field. 2005 published Annual Review of Fluid Mechanics 37 1 329-356 CaltechAUTHORS:DIMarfm05 TRUE 0066-4189 http://resolver.caltech.edu/CaltechAUTHORS:DIMarfm05 You are granted permission for individual, educational, research and non-commercial reproduction, distribution, display and performance of this work in any format. http://dx.doi.org/10.1146/annurev.fluid.36.050802.122015 CaltechAUTHORS 921 1 284 1 application/pdf en public other
DIMarfm.pdf
DIMarfm.pdf 454463 http://authors.library.caltech.edu/284/1/DIMarfm.pdf