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Transport across a turbulent air‐water interface
Author(s) -
Law C. N. S.,
Khoo B. C.
Publication year - 2002
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690480904
Subject(s) - turbulence , mechanics , mass transfer , interface (matter) , k epsilon turbulence model , work (physics) , flow (mathematics) , turbulence modeling , meteorology , physics , thermodynamics , bubble , maximum bubble pressure method
Turbulence structure in the immediate vicinity of the air–water interface has a dominant influence on the mass transfer across it. In this work, investigations on near‐surface turbulence and mass‐transfer rate were carried out for two distinct flow conditions: one with turbulence generated from beneath the interface, the other via wind shear from above the interface. Turbulence measurement with respect to the fluctuating interface was performed and Hanratty's β, the gradient of the linear variation of vertical velocity at the interface, was quantified. It is found that incorporating a near‐surface turbulence parameter such as β provides a reasonable model for interfacial mass transfer, applicable to the two vastly different flow conditions studied.