Results 171 to 180 of about 100,432 (219)

Model for the transition in bluff body wakes

Physical Review Letters, 1994
The transition from a peroidic vortex street to a less ordered state of vortex shedding in the wake of elongated bluff bodies is investigated in the case of a ring. Experimental results characterizing this transition are presented. The complex Ginzburg-Landau model, which is known to accurately describe the periodic regime, is extended to the ...
, Leweke, , Provansal
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Benchmarking Bluff Body Aerodynamics

21st AIAA Aerodynamic Decelerator Systems Technology Conference and Seminar, 2011
Flow around aerodynamic decelerators systems can be canonically represented by unsteady bluff body aerodynamics where the incident flow quickly detaches from contact with the body and a complex system of temporally evolving vortical structures establishes itself in the wake of the body. By focusing consideration on the flow around simplified bluff body
Greg Noetscher, Richard Charles
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Bluff Body Aerodynamics

2013
The aerodynamic characteristics of bluff bodies differ substantially from streamlined bodies, and an understanding of bluff body aerodynamics is essential to make progress in understanding wind engineering. Streamlined bodies like aircraft wings have a rounded nose, a thin profile, and a sharp trailing edge.
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On Flame Stabilization by Bluff-Bodies

Journal of Engineering for Power, 1980
Flame stabilization by bluff-bodies has been investigated to highlight the role of recirculation zone on the phenomenon. It has been observed that close correlations exist between heat exchange from recirculation zone and flame stability as controlled by recirculation strength.
K. M. Kundu, D. Banerjee, D. Bhaduri
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Geometry of bluff body wakes

The Canadian Journal of Chemical Engineering, 1973
AbstractThe attached recirculating wake zone has been experimentally investigated for spheres, spherical caps and circular discs normal to the flow. Tracer photography in a water tunnel was employed for the measurements. Results are presented over the range of Reynolds number from 20 to 400.
T. R. Kalra, P. H. T. Uhlherr
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Wake Instabilities Behind Bluff Bodies

2006
The observation by Benard of a vortex street in the wake of a circular cylinder has been commonly associated with the stability analysis of the double alternate street proposed by von Karman. After a short historical review of these studies, we present the main progress in understanding this instability during the last decade.
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Dynamics of rolling bluff bodies

2018
The fluid-structure interaction of bluff bodies rolling through a fluid along a flat surface is explored both numerically and experimentally. This thesis identifies relevant studies from the literature, describes the different methods of investigation and presents the outcomes of the research program. A major focus is on the initial transitions of two-
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The Decay of Bluff Body Wakes

SAE International Journal of Passenger Cars - Mechanical Systems, 2011
<div class="section abstract"><div class="htmlview paragraph">Vehicles on the road operate in the turbulent flow field resulting from the combined effects of the natural wind and the wakes of other vehicles. While substantial data exists on the properties of the natural wind, much less information is available for the wake properties of ...
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Bluff-body aerodynamics and turbulence

Journal of Wind Engineering and Industrial Aerodynamics, 1993
Abstract This paper reviews recent findings on the effects of freestream turbulence on bluff-body flow and flutter. Materials of this review are mostly taken from the author's own wind-tunnel measurements on 2D and 3D bluff bodies with rectangular cross-sections. The effects of both turbulence intensity and scale are discussed in detail.
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On The Simulation of Turbulent Flow past Bluff Bodies

Journal of Wind Engineering and Industrial Aerodynamics, 1993
Abstract The paper reviews calculations performed to-date of vortex-shedding flow past long cylinders at high Reynolds numbers where the effect of stochastic turbulent fluctuations superimposed on the 2D periodic shedding motion needs to be simulated.
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