Spanwise mean velocity profiles for different spanwise
Streamwise-Travelling Waves of Spanwise Wall Velocity for Turbulent Drag Reduction
... the mean spanwise velocity, ...of spanwise velocity along the vertical direction is observed: at a non-zero wall-normal location, the value of the wall velocity is encountered at ...
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The control of turbulent flows around bluff bodies by means of spanwise sinusoidal profiles
... 160 Another insight of the topology of the flow field around the partial SSP geometries is taken from the above view. As the vorticity pathlines are a lot clearer to visualise in this perspective. In Figure 6.7, the ...
287
A numerical study of turbulent drag reduction using streamwise travelling waves of spanwise wall velocity
... the profiles at different Reynolds number away from the wall, especially at the channel ...three profiles, with the peak value moving closer to the wall and becoming ...for different Reynolds ...
272
Turbulent Drag Reduction by Spanwise Wall Oscillations
... constant mean pressure ...the spanwise and streamwise (for the case of inclination cycle) velocity ...wall-shear velocity and channel half-width as well as the Reynolds number dependency in ...
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Spanwise structure of wall pressure on a cylinder in axial flow
... the mean are nearly the same for this investigation as well as ...the spanwise vorticity, a local adverse pressure gradient ( ] p/ ] x ...tional velocity profile, 9,25 which can be interpreted as a ...
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An investigation of turbulent boundary layers with streamwise and spanwise pressure gradients
... same mean and standard deviation as the ...streamwise velocity distribution in this re- gion shares the distinctive log-normal shape as the viscous layer low-speed streak ...
267
The spanwise structure of the roof-level turbulence in a street canyon flow
... a spanwise filter revealed a larger spatio-temporal correlation for the spanwise fluctuating velocity component, which is an indication of larger scale structures above interacting with the ...
149
Turbulent skin friction drag reduction control by spanwise motion
... Channel, pipe and boundary layer flows are three canonical wall bounded turbulent flows. They are comparable to each other at the same Reynolds number when the proper flow characteristic scales are chosen for reference. ...
248
Turbulent boundary-layer control with plasma spanwise travelling waves
... create spanwise travelling waves for tur- bulent boundary-layer control using two different types of DBD plasma actuator ...bidirectional spanwise travelling waves. The unidirec- tional ...
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Layer formation and relaminarisation in plane Couette flow with spanwise stratification
... new mean flows in the form of large scale spanwise- flattened streamwise ...horizontal velocity scale and N the buoyancy ...the spanwise spacing of the ...
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Spanwise variations in nominally two dimensional rough wall boundary layers
... of mean velocity and turbulence intensity obtained on the spanwise centre-line and plotted against z/δ, where δ is taken as the distance from the bottom of the roughness elements to the point where ...
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Streamwise and spanwise plasma actuators for flow-induced cavity noise control
... stationary mean flow environment, the average airflow velocity induced by the plasma actuators was mea- sured using an inexpensive Pitot tube that connects to a Fur- ness FC02 ...two different ...
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Turbulent skin-friction drag deduction via spanwise wall oscillations
... of spanwise wall velocity, a generalization of the spanwise wall oscillations, has been chosen as model control strategy thanks to its high theoretical energetic perfor- ...the mean turbulent ...
217
Flow separation control over a rounded ramp with spanwise alternating wall actuation
... called spanwise alternating distributed strips control, is imposed onto the flat plate surface upstream of a rounded ramp by alternatively applying out-of-phase control and in-phase control to the wall-normal ...
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Turbulent flow control using spanwise travelling wave via Lorentz forcing
... streak velocity profiles have inflection points and are less stable than the mean velocity profile that is ...of velocity profiles with inflection points grow much ...
286
Turbulent boundary-layer control with DBD plasma actuators using spanwise travelling-wave technique
... maximum velocity of a DBD plasma actuator as a function of applied ...maximum velocity scaled with E ...the velocity does not appear to scale with E ...maximum velocity of around 7 m/s with an ...
306
An analytical and experimental investigation of aerofoil-turbulence interaction noise for plates with spanwise-varying leading edges
... Figure 19 shows the comparison of the sound power reduction spectra for three different width ratios of 0.78, 0.15 and 0.11 at a jet velocity of 60 m/s. Analytical predictions are also presented for the ...
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Direct numerical simulation analysis of spanwise oscillating Lorentz force in turbulent channel flow at low Reynolds number
... We employed different box sizes and resolutions for the no-force Re τ = 400 cases. The box sizes were 1 .5πδ × 2δ × 0.5πδ and πδ × 2δ × 0.5πδ with grid sizes of 188 × 98 × 98 and 128 × 98 × 98, respectively. Small ...
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CFD Investigation of Influence of Spanwise Pitch on Local Heat Transfer Distribution for In-Line Array of Impinging Jets for Medium Crossflow
... walls. Velocity inlet condition is given at the top of the plenum ...A velocity of 0.2463 m/s at 308 K is given. The velocity is calculated such that its mean jet Reynolds number is 10000 at ...
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Delaunay graph mapping based mesh deformation for simulation of a spanwise rigid and flexible flapping NACA0012 wing using DES with parallel implementation
... with velocity magnitude show the dynamics of the flow at different locations from Pt1 to Pt4 as defined in ...at different locations along the ...
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