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Surface age of surface renewal in turbulent interfacial transport
Author(s) -
Kermani A.,
Shen L.
Publication year - 2009
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2008gl037050
Subject(s) - turbulence , mechanics , surface (topology) , proxy (statistics) , heat transfer , lagrangian , surface layer , materials science , free surface , statistical physics , physics , layer (electronics) , nanotechnology , computer science , mathematics , geometry , theoretical physics , machine learning
We use direct numerical simulation to study characteristics of interfacial transfer of gas and heat in free‐surface turbulence. Using Lagrangian tracing, we are able to directly quantify surface age of surface renewal for the first time. The physical meaning of surface renewal and various representations of surface age, including the use of heat as a proxy, are discussed. Results show that the Higbie penetration theory and the Danckwerts random surface renewal model are inappropriate for gas transfer.