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The entrainment due to a turbulent fountain at a density interface

Published online by Cambridge University Press:  25 October 2005

Y. J. P. LIN  and
P. F. LINDEN
Y. J. P. LIN
Affiliation:
Department of Mechanical and Aerospace Engineering, University of California, San Diego, 9500 Gilman Drive La Jolla, CA 92093-0411, USA Present address: Energy & Resources Lab., Industrial Technology Research Institute, Bldg 64, 195, Sec. 4, Chung Hsing Road, Chutung, Hsinchu, Taiwan 310.
P. F. LINDEN
Affiliation:
Department of Mechanical and Aerospace Engineering, University of California, San Diego, 9500 Gilman Drive La Jolla, CA 92093-0411, USA
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Abstract

We describe new experiments to measure the penetrative entrainment by a turbulent fountain in a steady two-layer stratification. A theoretical model was established by assuming that the stratification consists of two uniform layers, and the penetrative entrainment rate is estimated quantitatively by three independent formulae. Two quasi-uniform layers were observed in the steady state in the laboratory experiments. Experimental results gave a nearly constant dimensionless penetrative entrainment rate (0.65±0.17) across a density interface when the local Richardson number is smaller than 1.2.

Information

Type
Papers
Information
Journal of Fluid Mechanics , Volume 542 , 10 November 2005 , pp. 25 - 52
Copyright
© 2005 Cambridge University Press

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