Pressure fluctuation in correlation with velocity fluctuations in turbulent wake flow

1993 ◽  
Vol 15 (6) ◽  
pp. 462-463 ◽  
Author(s):  
G.-L. Tsai ◽  
J.-T. Yang
Keyword(s):  
Pressure Fluctuation ◽  
Turbulent Wake ◽  
Wake Flow ◽  
Velocity Fluctuations

Control of the turbulent wake flow behind a circular cylinder by asymmetric sectoral hydrophobic coatings

2021 ◽  
Vol 33 (12) ◽  
pp. 121703
Author(s):  
Anatoliy Lebedev ◽  
Konstantin Dobroselsky ◽  
Alexey Safonov ◽  
Sergey Starinskiy ◽  
Veronica Sulyaeva ◽  
...  
Keyword(s):  
Circular Cylinder ◽  
Turbulent Wake ◽  
Wake Flow ◽  
Hydrophobic Coatings

Mass Transport in Shallow Turbulent Wake Flow by Planar Concentration Analysis Technique

2009 ◽  
Vol 135 (4) ◽  
pp. 257-270 ◽  
Author(s):  
Carl F. Carmer ◽  
Andreas C. Rummel ◽  
Gerhard H. Jirka
Keyword(s):  
Mass Transport ◽  
Turbulent Wake ◽  
Wake Flow ◽  
Analysis Technique

Experimental and numerical investigations of the turbulent wake flow of a generic space launcher at $$M_\infty =3$$ M ∞ = 3 and $$M_\infty =6$$ M ∞ = 6

2016 ◽  
Vol 8 (2) ◽  
pp. 101-116 ◽  
Author(s):  
V. Statnikov ◽  
S. Stephan ◽  
K. Pausch ◽  
M. Meinke ◽  
R. Radespiel ◽  
...  
Keyword(s):  
Turbulent Wake ◽  
Wake Flow ◽  
Numerical Investigations ◽  
Space Launcher

scholarly journals Fish swimming kinematics in a turbulent wake: To spill or not to spill?

2018 ◽  
Vol 40 ◽  
pp. 03024 ◽  
Author(s):  
Valentine Muhawenimana ◽  
Catherine A. M. E. Wilson ◽  
Jo Cable
Keyword(s):  
Three Dimensional ◽  
Turbulent Wake ◽  
Wake Flow ◽  
Complex Nature ◽  
Fish Length ◽  
Reynolds Stresses ◽  
Turbulent Structures ◽  
Lateral Velocity ◽  
Engineering Structures ◽  
Velocity Statistics

Due to the complex nature of fish-environment interactions, the effects of altered flow conditions on fish habitats and behaviour, particularly near obstructions, are not yet fully understood. Many hydro-engineering structures generate three-dimensional turbulent structures that differ in properties from naturally occurring ones, and are challenging to fish movement. Here, swimming stability and habitat usage of Nile tilapia (Oreochromis niloticus) were examined in the turbulent wake of a horizontally oriented cylinder (50 mm diameter, D) for a series of increasing cylinder Reynolds numbers (Red). Velocity statistics showed that the near wake downstream of the cylinder within a 2D distance had higher magnitudes of longitudinal, vertical and lateral velocity components as well as Reynolds stresses, turbulence intensity and turbulent kinetic energy than the remaining wake flow field. Flow accelerating over the cylinder top and underside generated two shear horizontal layers, where two coherent structures were formed due to the shear layer breakdown off the cylinder’s walls and alternating von Karman-type vortex shedding occurred in the wake of the cylinder. The eddy symmetry and vorticity off the cylinder’s edges was dependent on Red. The recorded total number of spills, defined as loss of balance, was inversely proportional to fish length and weight, and depended on proximity to the cylinder and the flume bed. Furthermore, the frequency of spills was closely linked to the orientation of vortices and magnitude of Reynolds stresses, suggesting that these parameters may govern the swimming stability of fishes. This information may be used to inform the design of fish-friendly obstacles including hydraulic structures and hydro turbines in riverine and estuarine systems.

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