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

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

doi:10.1299/kikaib.73.544

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 journal › Article › peer-review

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 language	English
Pages (from-to)	544-551
Number of pages	8
Journal	Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume	73
Issue number	2
DOIs	https://doi.org/10.1299/kikaib.73.544
Publication status	Published - Feb 2007
Externally published	Yes

All Science Journal Classification (ASJC) codes

Condensed Matter Physics
Mechanical Engineering

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title = "Effect of aspect ratio on three-dimensional flow in square cavity",

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.",

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AU - Okamoto, Shiki

AU - Yamanishi, Yoko

AU - Murayama, Fumiaki

AU - Mima, Takashi

AU - Eshima, Satoshi

PY - 2007/2

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

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