Bottom boundary layer in the Black Sea: Experimental data, turbulent diffusion, and fluxes

Oceanology ◽  
2007 ◽  
Vol 47 (1) ◽  
pp. 33-41 ◽  
Author(s):  
V. M. Kushnir
Keyword(s):  
Experimental Data ◽  
Boundary Layer ◽  
Black Sea ◽  
Turbulent Diffusion ◽  
Bottom Boundary Layer ◽  
The Black Sea ◽  
Bottom Boundary

scholarly journals Study of the effects of Ekman dynamics in the bottom boundary layer on the Black Sea continental slope

2020 ◽  
Vol 20 (1) ◽  
pp. 1-16
Author(s):  
A. G. Zatsepin ◽  
V. V. Kremenetskiy ◽  
O. I. Podymov ◽  
A. G. Ostrovskii
Keyword(s):  
Boundary Layer ◽  
Continental Slope ◽  
Black Sea ◽  
Bottom Boundary Layer ◽  
The Black Sea ◽  
Bottom Boundary

The near-bottom boundary layer in the black sea: Hydrological structure and modelling

1998 ◽  
Vol 9 (2) ◽  
pp. 79-101 ◽  
Author(s):  
V. N. Eremeev ◽  
L. I. Ivanov ◽  
A. S. Samodurov ◽  
M. Duman
Keyword(s):  
Boundary Layer ◽  
Black Sea ◽  
Bottom Boundary Layer ◽  
The Black Sea ◽  
Bottom Boundary ◽  
Hydrological Structure

scholarly journals A Self-Contained Acoustic Scintillation Instrument for Path-Averaged Measurements of Flow and Turbulence with Application to Hydrothermal Vent and Bottom Boundary Layer Dynamics

2005 ◽  
Vol 22 (10) ◽  
pp. 1602-1617 ◽  
Author(s):  
D. Di Iorio ◽  
D. Lemon ◽  
R. Chave
Keyword(s):  
Boundary Layer ◽  
Hydrothermal Vent ◽  
Acoustic Scattering ◽  
Temperature Fluctuations ◽  
Energy Dissipation Rate ◽  
Bottom Boundary Layer ◽  
The Black Sea ◽  
Small Scale ◽  
Bottom Boundary

Abstract A self-contained acoustical scintillation instrument is described that has been used to measure flow and turbulence characteristics in two diverse oceanographic settings. This instrument is a battery-operated and internally logging acoustic propagation system that is ideally suited to monitor long-term flow and small-scale effective refractive index fluctuations. When the temperature variability dominates the acoustic scattering, as is the case of a hydrothermal vent plume, then a measure of the vertical buoyancy-driven flow, together with the root-mean-square temperature fluctuations, can be obtained. Results for vent structure Hulk of the Main Endeavour vent field of the Juan de Fuca Ridge show that the long-term (71 days) temperature fluctuations, together with the vertical flow, can be used to estimate heat flux density. Measurements also show oscillations in the log-amplitude variance that result from plume advection by the ambient tidal currents and demonstrate the need for a long time series measurement. When the turbulent velocity dominates the acoustic scattering, as is the case in some energetic bottom boundary layer flows, then the turbulent kinetic energy dissipation rate is derived, assuming isotropic and homogeneous models. The methodology and results are summarized from an application to the Bosporus Canyon of the Black Sea, to monitor the flow and turbulence associated with Mediterranean seawater inflow.

Currents and turbulent diffusion in the bottom boundary layer of the Barents Sea

2007 ◽  
Vol 17 (5) ◽  
pp. 278-295
Author(s):  
V. M. Kushnir ◽  
E. Hansen ◽  
L. A. Petrenko ◽  
V. K. Pavlov ◽  
A. N. Morozov ◽  
...  
Keyword(s):  
Boundary Layer ◽  
Turbulent Diffusion ◽  
Barents Sea ◽  
Bottom Boundary Layer ◽  
Bottom Boundary ◽  
The Barents Sea

scholarly journals A NUMERICAL STUDY OF WAVE-CURRENT INTERACTION IN THE BOTTOM BOUNDARY LAYER

2017 ◽  
pp. 17
Author(s):  
Xuan Zhang ◽  
Richard Simons ◽  
Eugeny Buldakov
Keyword(s):  
Experimental Data ◽  
Boundary Layer ◽  
Numerical Study ◽  
Bottom Boundary Layer ◽  
Bed Shear Stress ◽  
Bottom Boundary ◽  
Time Histories ◽  
Current Interaction ◽  
Numerical Beach ◽  
Good Agreement

In the present work, a numerical wave-current flume has been developed, based on a standard k-ε model. The numerical flume was 12.86m in length, with a numerical beach at one end of the flume. The Volume of Fluid (VOF) method was used to capture the free surface in the flume. The velocity profile obtained at the test section from the numerical simulation has then been compared with experimental data and good agreement found. Periodic velocities in the bottom boundary layer have been obtained which agree well with the experimental data. The model provides an insight to the changes in bed shear stress time histories that characterise wave current interaction.

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