Turbulence structure and scalar transfer in stratified free–surface flows | Zendy

Nagaosa Ryuichi | Zendy; Saito Takayuki | Zendy

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Turbulence structure and scalar transfer in stratified free–surface flows

Author(s) -

Nagaosa Ryuichi,

Saito Takayuki

Publication year - 1997

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.690431003

Subject(s) - turbulence , free surface , mechanics , scalar (mathematics) , physics , boundary layer , classical mechanics , heat transfer , k epsilon turbulence model , direct numerical simulation , stratified flow , geometry , mathematics , reynolds number

Direct numerical simulations were used to investigate turbulence structure and scalar transfer across a shear‐free, nonwavy gas‐liquid interface (free surface) in stably stratified turbulent flows. These simulations solve the Navier–Stokes and thermal‐energy conservation equations, using a finite difference approximation. The relation between the turbulence structure in the stably stratified turbulent boundary layer and organized motion near the free surface are discussed. In addition, scalar transfer across a free surface is investigated by solving a passive scalcr conservation equation after both velocity and temperature fields are fully developed. The effects of stable stratification on the scalar transfer process in a region very close to the free surface are also discussed.

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