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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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.
|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.|
|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.|
|Deposited By:||Ruth Sustaita|
|Deposited On:||08 Feb 2012 21:55|
|Last Modified:||26 Dec 2012 14:49|
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