Effect of aspect ratio on three-dimensional flow in square cavity

Shiki Okamoto, Yoko Yamanishi, Fumiaki Murayama, Takashi Mima, Satoshi Eshima

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

This paper describes the complicated flow associated with the three-dimensional surface-mounted square cavities. The experiment was carried out in two types of wind tunnels and a water channel. The effect of the aspect ratio (cavity length to depth : L/D=1-8) of the cavity has been investigated in terms of the overall cavity drag increment, the surface pressure distribution and the velocity profiles in the flow inside the cavity. The flow pattern inside the cavities was observed by the flow visualization. The three-dimensionality of the primary vortex in the cavities have been estimated from location of the centre along the span of the cavity. Consequently it was found that (i) a remarkable decrease of the drag occurs at L/D=4, and (ii) two cells structure for L/D=4 and three cells structure for L/D)=8 exist in the velocity profile inside the cavity.

Original languageEnglish
Pages (from-to)544-551
Number of pages8
JournalNihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume73
Issue number2
Publication statusPublished - 2007 Feb 1

Keywords

  • Aspect ratio
  • Drag
  • Flow-visualization
  • LDV
  • Pressure distribution
  • Square cavity
  • Velocity distribution
  • Vortex

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanical Engineering

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