LES and DES Investigations of Turbulent Flow over a Sphere at Re = 10,000

G. S. Constantinescu; Kyle Squires

doi:10.1023/B:APPL.0000004937.34078.71

LES and DES Investigations of Turbulent Flow over a Sphere at Re = 10,000

G. S. Constantinescu, Kyle Squires

IAFSE-SEMTE: Mechanical and Aerospace Engineering

Research output: Contribution to journal › Review article › peer-review

125 Scopus citations

Abstract

The flow around a sphere at a reynolds number of 10⁴ in the subcritical regime was investigated. The large eddy simulation (LES) using a dynamic Smagorinsky type subgrid stress (SGS) model and detached eddy simulation (DES) were applied. The dynamic eddy viscosity model is used in the LES. In the regime the boundary layers at separation were laminar and transition to turbulence that occurs farther downstream in the separated shear layers. The quantities such as the drag coefficient, wake frequencies, position of laminar separation on the sphere and the mean pressure and skin-friction distributions along the sphere were also predicted.

Original language	English (US)
Pages (from-to)	267-298
Number of pages	32
Journal	Flow, Turbulence and Combustion
Volume	70
Issue number	1-4
DOIs	https://doi.org/10.1023/B:APPL.0000004937.34078.71
State	Published - Dec 29 2003

Keywords

Computational fluid dynamics
Detached eddy simulation
Large eddy simulation
Massively separated flows
Subgrid scale models
Wakes

ASJC Scopus subject areas

Chemical Engineering(all)
Physics and Astronomy(all)
Physical and Theoretical Chemistry

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abstract = "The flow around a sphere at a reynolds number of 104 in the subcritical regime was investigated. The large eddy simulation (LES) using a dynamic Smagorinsky type subgrid stress (SGS) model and detached eddy simulation (DES) were applied. The dynamic eddy viscosity model is used in the LES. In the regime the boundary layers at separation were laminar and transition to turbulence that occurs farther downstream in the separated shear layers. The quantities such as the drag coefficient, wake frequencies, position of laminar separation on the sphere and the mean pressure and skin-friction distributions along the sphere were also predicted.",

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AU - Squires, Kyle

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Y1 - 2003/12/29

N2 - The flow around a sphere at a reynolds number of 104 in the subcritical regime was investigated. The large eddy simulation (LES) using a dynamic Smagorinsky type subgrid stress (SGS) model and detached eddy simulation (DES) were applied. The dynamic eddy viscosity model is used in the LES. In the regime the boundary layers at separation were laminar and transition to turbulence that occurs farther downstream in the separated shear layers. The quantities such as the drag coefficient, wake frequencies, position of laminar separation on the sphere and the mean pressure and skin-friction distributions along the sphere were also predicted.

AB - The flow around a sphere at a reynolds number of 104 in the subcritical regime was investigated. The large eddy simulation (LES) using a dynamic Smagorinsky type subgrid stress (SGS) model and detached eddy simulation (DES) were applied. The dynamic eddy viscosity model is used in the LES. In the regime the boundary layers at separation were laminar and transition to turbulence that occurs farther downstream in the separated shear layers. The quantities such as the drag coefficient, wake frequencies, position of laminar separation on the sphere and the mean pressure and skin-friction distributions along the sphere were also predicted.

KW - Computational fluid dynamics

KW - Detached eddy simulation

KW - Large eddy simulation

KW - Massively separated flows

KW - Subgrid scale models

KW - Wakes

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DO - 10.1023/B:APPL.0000004937.34078.71

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