Vortex interaction with a rough wall formed by a hexagonal lattice of posts

An experimental study is reported which investigates the head-on collision of a laminar vortex ring of diameter D (ReΓ= 3000) on a fakir-like surface composed of slender circular posts protruding out of a planar layer. Lattices of the posts in hexagonal and random distribution (average porosity of ϵ...

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Veröffentlicht in:	Physics of fluids (1994) 2018-05, Vol.30 (5)
Hauptverfasser:	Li, Qianhui, Bruecker, Christoph H.
Format:	Artikel
Sprache:	eng
Schlagworte:	Boundary layer stability Flow control Flow stability Fluid dynamics Fluid flow Hexagonal lattice Lattice vibration Lattices Lobes Numbers Physics Porosity Secondary flow Vortices Wall flow
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