Laser-Doppler Velocimetry and Flow Visualization of 3-D Flows

Costis, C. E.; Telionis, Demetri P.

doi:10.1007/978-3-642-82459-3_12

Cited by 2 publications

(1 citation statement)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Noteworthy examples are the wall shear-stress distribution observed by Meier & Kreplin (1980) and the limiting streamlines reported by Han & Patel (1979) and Costis et al (1989). Meanwhile, several experiments made efforts to measure the velocity and vorticity field very close to the spheroid, see for example Costis & Telionis (1984). These measurements were usually made by laser sheets, particle displacement velocimetry (PDV) or Laser-Doppler velocimetry (LDV).…”

Section: Introductionmentioning

confidence: 99%

Instabilities in the Wake of an Inclined Prolate Spheroid

Andersson

Jiang

Okulov

2018

Computational Methods in Applied Sciences

View full text Add to dashboard Cite

We investigate the instabilities, bifurcations and transition in the wake behind a 45-degree inclined 6:1 prolate spheroid, through a series of direct numerical simulations (DNS) over a wide range of Reynolds numbers (Re) from 10 to 3000. We provide a detailed picture of how the originally symmetric and steady laminar wake at low Re gradually looses its symmetry and turns unsteady as Re is gradually increased. Several fascinating flow features have first been revealed and subsequently analysed, e.g. an asymmetric timeaveraged flow field, a surprisingly strong side force etc. As the wake partially becomes turbulent, we investigate a dominating coherent wake structure, namely a helical vortex tube, inside of which a helical symmetry alteration scenario was recovered in the intermediate wake, together with self-similarity in the far wake.

show abstract

Section: Introductionmentioning

confidence: 99%