A unifying framework for parameterizing stably stratified shear-flow turbulence

2014 ◽  
Vol 26 (3) ◽  
pp. 036601 ◽  
Author(s):  
Benjamin D. Mater ◽  
Subhas Karan Venayagamoorthy
Keyword(s):  
Shear Flow ◽  
Stratified Shear Flow ◽  
Flow Turbulence ◽  
Stably Stratified Shear Flow

A mathematical model of turbulent heat and mass transfer in stably stratified shear flow

1993 ◽  
Vol 253 (-1) ◽  
pp. 341 ◽  
Author(s):  
G. I. Barenblatt ◽  
M. Bertsch ◽  
R. Dal Passo ◽  
V. M. Prostokishin ◽  
M. Ughi
Keyword(s):  
Mathematical Model ◽  
Mass Transfer ◽  
Shear Flow ◽  
Heat And Mass Transfer ◽  
Turbulent Heat ◽  
Stratified Shear Flow ◽  
Stably Stratified Shear Flow

Turbulence in a Stably Stratified Shear Flow: A Progress Report

1987 ◽  
pp. 67-76 ◽  
Author(s):  
J. J. Rohr ◽  
K. N. Heiland ◽  
E. C. Itsweire ◽  
C. W. Van Atta
Keyword(s):  
Shear Flow ◽  
Progress Report ◽  
Stratified Shear Flow ◽  
Stably Stratified Shear Flow

Entrainment Correlations Based on a Fuel/Water Stratified Shear Flow

2002 ◽  
Author(s):  
Peter A. Chang ◽  
Wesley Wilson ◽  
Paisan Atsavapranee ◽  
Xiongjun Wu ◽  
Joseph Katz
Keyword(s):  
Shear Flow ◽  
Ad Hoc ◽  
Computational Simulation ◽  
Concentration Data ◽  
Buoyant Jets ◽  
Entrainment Velocity ◽  
Fuel Droplets ◽  
Fluid Fraction ◽  
Stratified Shear Flow ◽  
Stably Stratified Shear Flow

The purpose of this work was twofold: first, to develop correlations for the entrainment of small fuel droplets into water in a stratified fuel/water shear flow; second, to implement the correlations in a CFD code and validate it with experimental effluent fuel concentration data. It is assumed that the droplets act as passive scalars and are advected far from their generation regions where they may cause fuel contamination problems far down-stream. This work relied upon extensive experimental data obtained from a stably stratified shear flow: droplet number, droplet PDF, fluid fraction and velocity field data. The droplet data was expressed as a nondimensional entrainment velocity (E) for the volume flux of fuel due to small droplets. The fluid fraction and velocity fields at the interface were expressed in terms of Richardson numbers (Ri). It was found that E = CeRi−n where n = 1 and Ce is a constant, gives a good fit for the two experimental velocity cases. The best correlation was implemented in a computational simulation of the stably stratified shear flow, and the results show that the simulation can predict the entrainment quite well. A second simulation was performed for a flow with energetic vertical buoyant jets (“buoyant flow events”) and stably stratified shear flows with very large Richardson numbers. In this case, the simulations underpredicted effluent fuel concentrations by two orders of magnitude. Ad hoc corrections to the entrainment correlations show marked improvements.

Stably stratified shear flow over low hills

1988 ◽  
Vol 114 (482) ◽  
pp. 859-886 ◽  
Author(s):  
J. C. R. Hunt ◽  
K. J. Richards ◽  
P. W. M. Brighton
Keyword(s):  
Shear Flow ◽  
Stratified Shear Flow ◽  
Stably Stratified Shear Flow

Optimal energy growth in a stably stratified shear flow

2018 ◽  
Vol 50 (1) ◽  
pp. 011421
Author(s):  
Sharath Jose ◽  
Anubhab Roy ◽  
Rahul Bale ◽  
Krithika Iyer ◽  
Rama Govindarajan
Keyword(s):  
Shear Flow ◽  
Energy Growth ◽  
Optimal Energy ◽  
Stratified Shear Flow ◽  
Stably Stratified Shear Flow
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