The evolution of an isolated turbulent region in a two-layer fluid

J.B. Flór; H.J.S. Fernando; G.J.F. van Heijst

doi:10.1063/1.868083

The evolution of an isolated turbulent region in a two-layer fluid

J.B. Flór, H.J.S. Fernando, G.J.F. van Heijst

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Abstract

A turbulent region is generated by horizontal pulsed injection at the interface of a two-layer fluid. Flow visualization studies reveal the existence of three stages in the evolution of the vertical size of this region: growth, maximum height, and collapse. A scaling analysis for the height of the turbulent region is presented, which appears to be in good agreement with the measurements. Comparable results were obtained by Fernando, van Heijst, and Fonseka (submitted to J. Fluid Mech.) for similar experiments in a linearly stratified fluid. Thorpe-scale measurements of the turbulent region reveal that the ratio of the rms displacement L_t and the maximum displacement L_tmax remain constant with time. The eventual formation process of the dipolar vortices after the collapse and the influence of interfacial wave motions on these dipolar vortices are discussed.

Original language	English
Pages (from-to)	287-296
Number of pages	10
Journal	Physics of Fluids
Volume	6
Issue number	1
DOIs	https://doi.org/10.1063/1.868083
Publication status	Published - 1994

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The evolution of an isolated turbulent region in a two-layer fluid

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