Abstract The aim of this work is to gain an insight on the effect wall heating aeroacoustic sound radiated by bluff bodies in laminar flows. In particular, local thermal treatment boundary was investigated as a possible method for active controlling emitted noise. This technique studied performing direct numerical simulations noise produced isolated square cylinder operating at Reynolds and Mac...

Approximating the complexity of natural locomotor conditions provides insight into the diversity of mechanisms that enable animals to successfully navigate through their environment. When exposed to vortices shed from a cylinder, fishes hold station by adopting a mode of locomotion called the Kármán gait, whereby the body of the fish displays large, lateral oscillations and the tail-beat freque...

A nonlinear transmisson problem for an elastic full von Karman beam is considered here. We prove that the system possesses a compact global attractor.

The objective of this study is to investigate the collapsing behavior cavitation, which leads erosion material. An experimental examination was conducted in a channel with semi-circular cylinder obstacle, serves as “vortex cavity” generator. Cavitation achieved by employing range pressure differences over test section and high-speed camera used observe cavitation behavior. flow field behind inv...

b Institut Français du Pétrole, 1 et 4 avenue de Bois Préau 92852 Rueil Malmaison, France c present address : Institut Français du Pétrole, 1 et 4 avenue de Bois Préau 92852 Rueil Malmaison, France, [email protected] d present address : Laboratoire LIP CNRS UMR 7623, Université Pierre et Marie Curie, Paris, France, [email protected] * corresponding author August 31, 2009 Lectur...

The instability of the Kármán vortex street is revisited under a spatio-temporal perspective that allows the taking into account of the advection of the vortices by the external flow. We analyse a simplified point vortex model and show through numerical simulations of its linear impulse response that the system becomes convectively unstable above a certain critical advection velocity. This crit...