Interaction of surface waves with turbulence: direct numerical simulations of turbulent open-channel flow

We report direct numerical simulations of incompressible unsteady open-channel flow. Two mechanisms of turbulence production are considered: shear at the bottom and externally imposed stress at the free surface. We concentrate upon the effects of mutual interaction of small-amplitude gravity waves w...

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Bibliographic Details
Published in:Journal of fluid mechanics 1995-03, Vol.286, p.1-23
Main Authors: Borue, Vadim, Orszag, Steven A., Staroselsky, Ilya
Format: Article
Language:English
Subjects:
Applied fluid mechanics
Exact sciences and technology
Fluid dynamics
Fundamental areas of phenomenology (including applications)
Hydrodynamic waves
Hydrodynamics, hydraulics, hydrostatics
Physics
Turbulence simulation and modeling
Turbulent flows, convection, and heat transfer
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Summary:We report direct numerical simulations of incompressible unsteady open-channel flow. Two mechanisms of turbulence production are considered: shear at the bottom and externally imposed stress at the free surface. We concentrate upon the effects of mutual interaction of small-amplitude gravity waves with in-depth turbulence and statistical properties of the near-free-surface region. Extensions of our approach can be used to study turbulent mixing in the upper ocean and wind–sea interaction, and to provide diagnostics of bulk turbulence.
ISSN:0022-1120
1469-7645
DOI:10.1017/S0022112095000620