期刊
JOURNAL OF FLUID MECHANICS
卷 542, 期 -, 页码 25-52出版社
CAMBRIDGE UNIV PRESS
DOI: 10.1017/S002211200500635X
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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.
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