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Vortical structures over rectangular cavities at low speed

Vortical structures over rectangular cavities at low speed
Vortical structures over rectangular cavities at low speed
Experiments have been performed to acquire qualitative and quantitative flow-field data for an open cavity flow using the particle image velocimetry technique. The study focuses on the time-mean and instantaneous development of the turbulent flow structures in the cavity shear layer. The effects of geometry (length-to-depth ratio) and flow speed on these structures are investigated. The shear layers are found to be characterized by coherent vortical structures whose size and rate of growth vary with geometry. The smaller scales of the flow are investigated using a large-eddy decomposition method. Results show these stochastic structures to predominate primarily in the shear layer and aft wall regions.
1070-6631
015104-[8pp]
Ashcroft, Graham
2b988f53-8d15-4997-81ce-d2560b0b29a6
Zhang, Xin
3056a795-80f7-4bbd-9c75-ecbc93085421
Ashcroft, Graham
2b988f53-8d15-4997-81ce-d2560b0b29a6
Zhang, Xin
3056a795-80f7-4bbd-9c75-ecbc93085421

Ashcroft, Graham and Zhang, Xin (2005) Vortical structures over rectangular cavities at low speed. Physics of Fluids, 17 (1), 015104-[8pp].

Record type: Article

Abstract

Experiments have been performed to acquire qualitative and quantitative flow-field data for an open cavity flow using the particle image velocimetry technique. The study focuses on the time-mean and instantaneous development of the turbulent flow structures in the cavity shear layer. The effects of geometry (length-to-depth ratio) and flow speed on these structures are investigated. The shear layers are found to be characterized by coherent vortical structures whose size and rate of growth vary with geometry. The smaller scales of the flow are investigated using a large-eddy decomposition method. Results show these stochastic structures to predominate primarily in the shear layer and aft wall regions.

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More information

Published date: January 2005
Additional Information: Article number 015104

Identifiers

Local EPrints ID: 23180
URI: https://eprints.soton.ac.uk/id/eprint/23180
ISSN: 1070-6631
PURE UUID: 80ad0f8f-b7ae-4a92-b9c8-47bb51a547b0

Catalogue record

Date deposited: 15 Mar 2006
Last modified: 08 Oct 2017 05:14

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