Stochastic geometric properties of scalar interfaces in turbulent jets
- Creators
- Miller, Paul L.
- Dimotakis, Paul E.
Abstract
Experiments were conducted in which the behavior of scalar interfaces in turbulent jets was examined, using laser-induced fluorescence (LIF) techniques. The experiments were carried out in a high Schmidt number fluid (water), on the jet centerline, over a jet Reynolds number range of 1000<=Re<=24 000. Both two-dimensional scalar data, c(r,t) at fixed x/d, and one-dimensional scalar data, c(t) at fixed x/d and r/x, were analyzed using standard one- and two-dimensional fractal box-counting algorithms. Careful treatment was given to the handling of noise. Both long and short records as well as off-centerline measurements were also investigated. The important effect of threshold upon the results is discussed. No evidence was found of a constant (power-law) fractal dimension over the range of Reynolds numbers studied. On the other hand, the results are consistent with the computed behavior of a simple stochastic model of interface geometry.
Additional Information
© 1991 The American Physical Society. (Received 26 July 1989; accepted 14 September 1990)Files
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Additional details
- Eprint ID
- 6439
- Resolver ID
- CaltechAUTHORS:MILpofa91a
- Created
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2006-12-09Created from EPrint's datestamp field
- Updated
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2021-11-08Created from EPrint's last_modified field
- Caltech groups
- GALCIT