Results 81 to 90 of about 739 (180)

Influence of Surface Waves on Kármán Street Behind Vertical Cylinder: Subharmonic Lock-in and Phase Synchronizaton

open access: yes, 2016
International audienceIt is demonstrated experimentally that the influence of harmonic surface waves on the turbulent Kármán vortex street leads to lock-in of the sheddingfrequency and phase synchronization.
Anne-Claire Bennis   +9 more
core   +1 more source

Large Eddy Simulation of Flow over Wavy Cylinders with Different Twisted Angles at a Subcritical Reynolds Number

open access: yesJournal of Marine Science and Engineering, 2019
The deformation of the cylinder has been proved to greatly reduce the fluctuation of lift and the vortex-induced vibration. In this article, a new form of deformation mode for the smooth cylinder is proposed in order to reduce the vortex-induced ...
Chunyu Guo   +5 more
doaj   +1 more source

SWIMMING AGAINST THE FLOW: A ROBOTICS SIMULATION FRAMEWORK

open access: yesInvestigación & Desarrollo, 2016
Fish in nature take advantage of some types of turbulence and even generate it to swim with a minimum expenditure of energy. This is the case observed in rainbow trout swimming against the flow in well patterned turbulence phenomenon called Karman Street.
S. Cecilia Tapia Siles, Ryad Chellali
doaj  

Crystallization and Motility-Induced Phase Separation in the Flow of Active Brownian Particles Around an Obstacle [PDF]

open access: yesEPJ Web of Conferences
The interaction between fluid flow and obstacles is a fundamental problem in fluid dynamics, exemplified by the Kármán vortex street and its Reynolds number-dependent instabilities.
Iwase Koji, Isobe Masaharu
doaj   +1 more source

Spacetime Defects: Von Kármán Vortex Street Like Configurations

open access: yes, 2015
A special arrangement of spinning strings with dislocations similar to a von Kármán vortex street is studied. We numerically solve the geodesic equations for the special case of a test particle moving along two infinite rows of pure dislocations and also
Letelier P.S., Letelier, PS
core   +1 more source

The Kuroshio-Oyashio front as a compound vortex street

open access: yes, 1968
A concept presented in this paper can account for a wide variety of observed features in the Kuroshio-Oyashio front, just east of Japan. The concept, a synthetic description, consists of two von Kármán vortex streets arranged side by side; it is referred
Barkley, Richard A.
core  

Symmetry properties of the reverse Bénard-von Kármán vortex street produced by a flapping foil

open access: yes, 2006
International audienceWe study experimentally the vortex streets produced by a high-aspect-ratio pitching foil placed in a hydrodynamic tunnel. PIV measurements give access to the spatio-temporal characteristics of the vorticity field in the wake and ...
Eduardo Wesfreid, José   +2 more
core   +1 more source

Vortex Dynamics Effects on the Development of a Confined Turbulent Wake

open access: yesFluids
In the present work, the turbulent wake of a circular cylinder in a confined flow environment at a blockage ratio of 14% is experimentally investigated in a wind tunnel consisting of a parallel test section followed by a constant-area distorting duct ...
Ioannis D. Kalogirou   +4 more
doaj   +1 more source

Cavitation Influence on Kármán Vortex Shedding and Induced Hydrofoil Vibrations [PDF]

open access: yes
The present study deals with the shedding process of the von Kármán vortices at the trailing edge of a 2D hydrofoil at high Reynolds number. This research focuses mainly on the effects of cavitation and fluid-structure interaction on the mechanism of the
Avellan, François   +4 more
core   +1 more source

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