A new model of turbulent mixing by a jet impacting a stratified interface
Abstract eng: We investigate experimentally the mechanism of erosion by a turbulent jet impinging a density interface with moderate Reynolds numbers and low Froude numbers. From our measurements, we present a new scenario of turbulent mixing. The turbulent eddies contribute indirectly to the mixing by generating surface gravity waves. The waves are then amplified by a mechanism similar to the Miles instability characterized by the presence of a critical layer, where the phase velocity of the waves matches the velocity of the mean flow. This amplification leads to the breaking of the wave, which mixes efficiently both fluids.
Publisher:
International Union of Theoretical and Applied Mechanics, 2016
Conference Title:
Conference Title:
24th International Congress of Theoretical and Applied Mechanics
Conference Venue:
Montreal (CA)
Conference Dates:
2016-08-21 / 2016-08-26
Rights:
Text je chráněný podle autorského zákona č. 121/2000 Sb.
Record appears in:
Record created 2016-11-15, last modified 2016-11-15
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