Confinement effects on flows past an in-duct rectangular bluff body with semi-circular leading edge

K. F. Yu; Chi Kin Randolph Leung; Z. B. Lu; Li Cheng; H. Y H Chan

doi:10.1063/1.3651861

Confinement effects on flows past an in-duct rectangular bluff body with semi-circular leading edge

K. F. Yu, Chi Kin Randolph Leung, Z. B. Lu, Li Cheng, H. Y H Chan

Research output: Chapter in book / Conference proceeding › Conference article published in proceeding or book › Academic research › peer-review

6 Citations (Scopus)

Abstract

This paper reports a numerical study of a two-dimensional time-dependent viscous flow past a rectangular bluff body with a Reynolds number Re=6 073 based on bluff body height installed in a flow duct. The leading edge of the bluff body takes a semi-circular profile. The governing equations of the flow are solved with large-eddy simulation (LES) using a commercial computational fluid dynamics software FLUENT. The focus of the present study is to explore the effects of the ratio of the height of the bluff body H and the separation D between the bluff body and the duct wall surface. The numerical simulations are validated with the results obtained from a separate wind-tunnel experiment. Numerical simulations with various D/H are carried out. The numerical results show that the mean and instantaneous flow quantities are strongly dependent on the ratio D/H. The suppression effects of vortex shedding by the neighboring duct wall are highlighted by comparing the unsteady flow structure topology, dominant Strouhal number, lift and drag forces, etc. The mechanism for the suppression of vortex shedding suppression and its variation with D/H are analyzed, and its relevance to generation of flow inducing noise by a bluff body in a flow duct is discussed.

Original language	English
Title of host publication	Recent Progresses in Fluid Dynamics Research - Proceedings of the Sixth International Conference on Fluid Mechanics, ICFM VI
Pages	154-156
Number of pages	3
Volume	1376
DOIs	https://doi.org/10.1063/1.3651861
Publication status	Published - 8 Nov 2011
Event	Proceedings of the 6th International Conference on Fluid Mechanics: Recent Progresses in Fluid Dynamics Research, ICFM VI - Guangzhou, China Duration: 30 Jun 2011 → 3 Jul 2011

Conference

Conference	Proceedings of the 6th International Conference on Fluid Mechanics: Recent Progresses in Fluid Dynamics Research, ICFM VI
Country/Territory	China
City	Guangzhou
Period	30/06/11 → 3/07/11

Keywords

bluff body
CFD
duct flow

ASJC Scopus subject areas

General Physics and Astronomy

More information

10.1063/1.3651861

http://hdl.handle.net/10397/6009

Cite this

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title = "Confinement effects on flows past an in-duct rectangular bluff body with semi-circular leading edge",

abstract = "This paper reports a numerical study of a two-dimensional time-dependent viscous flow past a rectangular bluff body with a Reynolds number Re=6 073 based on bluff body height installed in a flow duct. The leading edge of the bluff body takes a semi-circular profile. The governing equations of the flow are solved with large-eddy simulation (LES) using a commercial computational fluid dynamics software FLUENT. The focus of the present study is to explore the effects of the ratio of the height of the bluff body H and the separation D between the bluff body and the duct wall surface. The numerical simulations are validated with the results obtained from a separate wind-tunnel experiment. Numerical simulations with various D/H are carried out. The numerical results show that the mean and instantaneous flow quantities are strongly dependent on the ratio D/H. The suppression effects of vortex shedding by the neighboring duct wall are highlighted by comparing the unsteady flow structure topology, dominant Strouhal number, lift and drag forces, etc. The mechanism for the suppression of vortex shedding suppression and its variation with D/H are analyzed, and its relevance to generation of flow inducing noise by a bluff body in a flow duct is discussed.",

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Yu, KF, Leung, CKR, Lu, ZB, Cheng, L & Chan, HYH 2011, Confinement effects on flows past an in-duct rectangular bluff body with semi-circular leading edge. in Recent Progresses in Fluid Dynamics Research - Proceedings of the Sixth International Conference on Fluid Mechanics, ICFM VI. vol. 1376, pp. 154-156, Proceedings of the 6th International Conference on Fluid Mechanics: Recent Progresses in Fluid Dynamics Research, ICFM VI, Guangzhou, China, 30/06/11. https://doi.org/10.1063/1.3651861

Confinement effects on flows past an in-duct rectangular bluff body with semi-circular leading edge. / Yu, K. F.; Leung, Chi Kin Randolph; Lu, Z. B. et al.
Recent Progresses in Fluid Dynamics Research - Proceedings of the Sixth International Conference on Fluid Mechanics, ICFM VI. Vol. 1376 2011. p. 154-156.

Research output: Chapter in book / Conference proceeding › Conference article published in proceeding or book › Academic research › peer-review

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AU - Chan, H. Y H

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N2 - This paper reports a numerical study of a two-dimensional time-dependent viscous flow past a rectangular bluff body with a Reynolds number Re=6 073 based on bluff body height installed in a flow duct. The leading edge of the bluff body takes a semi-circular profile. The governing equations of the flow are solved with large-eddy simulation (LES) using a commercial computational fluid dynamics software FLUENT. The focus of the present study is to explore the effects of the ratio of the height of the bluff body H and the separation D between the bluff body and the duct wall surface. The numerical simulations are validated with the results obtained from a separate wind-tunnel experiment. Numerical simulations with various D/H are carried out. The numerical results show that the mean and instantaneous flow quantities are strongly dependent on the ratio D/H. The suppression effects of vortex shedding by the neighboring duct wall are highlighted by comparing the unsteady flow structure topology, dominant Strouhal number, lift and drag forces, etc. The mechanism for the suppression of vortex shedding suppression and its variation with D/H are analyzed, and its relevance to generation of flow inducing noise by a bluff body in a flow duct is discussed.

AB - This paper reports a numerical study of a two-dimensional time-dependent viscous flow past a rectangular bluff body with a Reynolds number Re=6 073 based on bluff body height installed in a flow duct. The leading edge of the bluff body takes a semi-circular profile. The governing equations of the flow are solved with large-eddy simulation (LES) using a commercial computational fluid dynamics software FLUENT. The focus of the present study is to explore the effects of the ratio of the height of the bluff body H and the separation D between the bluff body and the duct wall surface. The numerical simulations are validated with the results obtained from a separate wind-tunnel experiment. Numerical simulations with various D/H are carried out. The numerical results show that the mean and instantaneous flow quantities are strongly dependent on the ratio D/H. The suppression effects of vortex shedding by the neighboring duct wall are highlighted by comparing the unsteady flow structure topology, dominant Strouhal number, lift and drag forces, etc. The mechanism for the suppression of vortex shedding suppression and its variation with D/H are analyzed, and its relevance to generation of flow inducing noise by a bluff body in a flow duct is discussed.

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ER -

Confinement effects on flows past an in-duct rectangular bluff body with semi-circular leading edge

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