NDLI: Flow in the Wake of Surface-Mounted Pyramids

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Abuomar, Mazen Robert, J. Martinuzzi
Copyright Year	2002
Abstract	The flow around square-based, wall-mounted pyramids in thin and thick boundary layer was experimentally investigated as a function of the pyramid apex angle, ζ, and, angle of attack, α, based on mean flow surface patterns, pressure and velocity measurements. For thin boundary layers, wake periodicity is observed. For slender pyramids (20° < ζ < 75°), periodic shedding of vortices is observed. The shedding frequency scales with the frontal (projected) width. For broad pyramids, wake periodicity cannot be related to vortex shedding. Vortex shedding appears related to the existence of a double vortex-structure along the side faces of the slender pyramids. For thick boundary layers, no wake periodicity is observed and the mean flow structure resembles that of broad pyramids. In all cases, the separation and reattachment point upstream and downstream of the obstacle scales with the projected frontal area.
Sponsorship	Fluids Engineering Division
Starting Page	1187
Ending Page	1194
Page Count	8
File Format	PDF
ISBN	0791836169
DOI	10.1115/FEDSM2002-31415
e-ISBN	0791836002
Volume Number	Volume 2: Symposia and General Papers, Parts A and B
Conference Proceedings	ASME 2002 Joint U.S.-European Fluids Engineering Division Conference
Language	English
Publisher Date	2002-07-14
Publisher Place	Montreal, Quebec, Canada
Access Restriction	Subscribed
Subject Keyword	Pyramid Vortex shedding Turbulent flow Piv Bluff-body Turbulence Vortices Wakes Separation (technology) Velocity measurement Flow (dynamics) Pressure Boundary layers
Content Type	Text
Resource Type	Article

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