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Measurements of scalar power spectra in high Schmidt number turbulent jets

Miller, Paul L. and Dimotakis, Paul E. (1996) Measurements of scalar power spectra in high Schmidt number turbulent jets. Journal of Fluid Mechanics, 308 (1). pp. 129-146. ISSN 0022-1120. http://resolver.caltech.edu/CaltechAUTHORS:20120208-132613256

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Abstract

We report on an experimental investigation of temporal, scalar power spectra of round, high Schmidt number (Sc ≃ 1.9 × 10^3), momentum-dominated turbulent jets, for jet Reynolds numbers in the range of 1.25 × 10^4 ≤ Re ≤ 7.2 × 10^4. At intermediate scales, we find a spectrum with a slope (logarithmic derivative) that increases in absolute value with Reynolds number, but remains less than 5/3 at the highest Reynolds number in our experiments. At the smallest scales, our spectra exhibit no k^(−1) power-law behaviour, but, rather, seem to be approximated by a log-normal function, over a range of scales exceeding a factor of 40, in some cases.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1017/S0022112096001425 DOIUNSPECIFIED
http://journals.cambridge.org/action/displayAbstract?fromPage=online&aid=378539PublisherUNSPECIFIED
Additional Information:© 1996 Cambridge University Press. Received 4 March 1995 and in revised form 2 September 1995. Published online: 26 April 2006. We would like to acknowledge contributions by Dan Lang and David Dowling to the experiments. This work was supported by AFOSR Grants Nos. 83-0213, 88-0155, and F4962C92-J-0290, as well as GRI Contract No. 5087-260-1467.
Funders:
Funding AgencyGrant Number
Air Force Office of Scientific Research (AFOSR)83-0213
Air Force Office of Scientific Research (AFOSR)88-0155
Air Force Office of Scientific Research (AFOSR)F49620-92-J-0290
GRI 5087-260-1467
Record Number:CaltechAUTHORS:20120208-132613256
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20120208-132613256
Official Citation:Measurements of scalar power spectra in high Schmidt number turbulent jets preview Paul L. Miller and Paul E. Dimotakis Journal of Fluid Mechanics / Volume 308 / pp 129 - 146 1996 Cambridge University Press Published online: 26 April 2006 DOI:10.1017/S0022112096001425
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:29207
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:08 Feb 2012 21:55
Last Modified:26 Dec 2012 14:49

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