Internal tidal asymmetry in channel flows: Origins and consequences

1996 ◽  
pp. 211-249 ◽  
Author(s):  
D. A. Jay ◽  
J. D. Musiak
Keyword(s):  
Channel Flows ◽  
Tidal Asymmetry ◽  
Internal Tidal Asymmetry

scholarly journals Advection of the Salt Wedge and Evolution of the Internal Flow Structure in the Rotterdam Waterway

2011 ◽  
Vol 41 (1) ◽  
pp. 3-27 ◽  
Author(s):  
Michel A. J. de Nijs ◽  
Julie D. Pietrzak ◽  
Johan C. Winterwerp
Keyword(s):  
Turbulent Mixing ◽  
Internal Flow ◽  
Field Measurements ◽  
Tidal Asymmetry ◽  
Exchange Flow ◽  
Salt Wedge ◽  
Slack Water ◽  
Measuring Period ◽  
Wedge Structure ◽  
Internal Tidal Asymmetry

Abstract An analysis of field measurements recorded over a tidal cycle in the Rotterdam Waterway is presented. These measurements are the first to elucidate the processes influencing the along-channel current structure and the excursion of the salt wedge in this estuary. The salt wedge structure remained stable throughout the measuring period. The velocity measurements indicate decoupling effects between the layers and that bed-generated turbulence is confined below the pycnocline. The barotropic M4 overtide structure is imposed at the mouth of the estuary, and the generation of M4 overtides within the estuary is found to be relatively small. Internal tidal asymmetry does not make a significant contribution to the M4 velocity frequency band. Instead, the combination of barotropic and baroclinic forcing, in conjunction with the suppression of turbulence at the interface, provides the main explanation for the time dependence and mean structure of the flow in the Rotterdam Waterway. This gives rise to the observed differences in the length of the flood and ebb, in the magnitudes of the flood and ebb velocities, in the length of the slack water periods, and in the timing of the onset of slack water at the surface and near the bed. It results in the formation of distinct exchange flow profiles at the head of the salt wedge around slack water and the creation of maximal velocities at the pycnocline during flood. Advection governs the displacement and structure of the salt wedge since turbulent mixing is suppressed. The tidal displacement of the salt wedge controls the height of the pycnocline above the bed at a particular site. Hence, it controls the height to which bed-generated turbulence can protrude into the water column. Consequently, the authors find asymmetries in the structure of the internal flow, turbulent mixing, and bed stresses that are not related to classical internal tidal asymmetry.

Mixed Convection in Channel Flows

2009 ◽  
Vol 40 (1) ◽  
pp. 31-56 ◽  
Author(s):  
Povilas Poskas ◽  
Robertas Poskas
Keyword(s):  
Mixed Convection ◽  
Channel Flows

High-Fidelity Numerical Simulations of Supersonic Channel Flows with Isothermal Walls

2021 ◽  
Author(s):  
Luiz Augusto C. Schiavo ◽  
William Wolf ◽  
Britton J. Olson ◽  
Joao Luiz F. Azevedo
Keyword(s):  
Numerical Simulations ◽  
Channel Flows ◽  
High Fidelity

PARTICLE THERMOPHORETIC DEPOSITION IN TURBULENT CHANNEL FLOWS

2001 ◽  
Vol 32 ◽  
pp. 1033-1034
Author(s):  
A. PINELLI ◽  
E. HONTAÑON ◽  
P. GARCIA-YBARRA
Keyword(s):  
Channel Flows ◽  
Turbulent Channel Flows
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