Embedded-LES and experiment of turbulent boundary layer flow around a floor-mounted cube

Nina Gall Jørgensen; Holger Koss; Jens Chr.  Bennetsen

Embedded-LES and experiment of turbulent boundary layer flow around a floor-mounted cube

Nina Gall Jørgensen, Holger Koss, Jens Chr. Bennetsen

Ramboll Foundation

Research output: Contribution to conference › Paper › Research

Abstract

An Embedded LES approach is used to numerically simulate fluctuating surface pressures on a floor-mounted cube in a turbulent boundary layer flow and compared to wind tunnel experiments. The computation were performed with the CFD software ANSYS FLUENT at a Reynolds number at cube height of Reh = 1.3x105. The computational mesh exists of 0.77 and 4.7 million hexahedra cells in the RANS and LES domains, respectively. The computed mean values are found to be accurate while the frequency spectrum of the upstream flow is not well captured due to failure of the upstream RANS-LES interface to produce correct velocity scales. However, the body induced turbulence is well captured in the fluctuating pressure coefficients.

Original language	English
Publication date	2012
Number of pages	10
Publication status	Published - 2012
Event	The Seventh International Colloquium on Bluff Body Aerodynamics and Applications - Jin Jiang Tower, Shanghai, China Duration: 2 Sept 2012 → 6 Sept 2012 Conference number: 7 http://bbaa7.org/index.aspx

Conference

Conference	The Seventh International Colloquium on Bluff Body Aerodynamics and Applications
Number	7
Location	Jin Jiang Tower
Country/Territory	China
City	Shanghai
Period	02/09/2012 → 06/09/2012
Internet address	http://bbaa7.org/index.aspx

Keywords

Embedded LES
Turbulent boundary layer flow
Floor-mounted cube

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abstract = "An Embedded LES approach is used to numerically simulate fluctuating surface pressures on a floor-mounted cube in a turbulent boundary layer flow and compared to wind tunnel experiments. The computation were performed with the CFD software ANSYS FLUENT at a Reynolds number at cube height of Reh = 1.3x105. The computational mesh exists of 0.77 and 4.7 million hexahedra cells in the RANS and LES domains, respectively. The computed mean values are found to be accurate while the frequency spectrum of the upstream flow is not well captured due to failure of the upstream RANS-LES interface to produce correct velocity scales. However, the body induced turbulence is well captured in the fluctuating pressure coefficients.",

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TY - CONF

T1 - Embedded-LES and experiment of turbulent boundary layer flow around a floor-mounted cube

AU - Jørgensen, Nina Gall

AU - Koss, Holger

AU - Bennetsen, Jens Chr.

N1 - Conference code: 7

PY - 2012

Y1 - 2012

N2 - An Embedded LES approach is used to numerically simulate fluctuating surface pressures on a floor-mounted cube in a turbulent boundary layer flow and compared to wind tunnel experiments. The computation were performed with the CFD software ANSYS FLUENT at a Reynolds number at cube height of Reh = 1.3x105. The computational mesh exists of 0.77 and 4.7 million hexahedra cells in the RANS and LES domains, respectively. The computed mean values are found to be accurate while the frequency spectrum of the upstream flow is not well captured due to failure of the upstream RANS-LES interface to produce correct velocity scales. However, the body induced turbulence is well captured in the fluctuating pressure coefficients.

AB - An Embedded LES approach is used to numerically simulate fluctuating surface pressures on a floor-mounted cube in a turbulent boundary layer flow and compared to wind tunnel experiments. The computation were performed with the CFD software ANSYS FLUENT at a Reynolds number at cube height of Reh = 1.3x105. The computational mesh exists of 0.77 and 4.7 million hexahedra cells in the RANS and LES domains, respectively. The computed mean values are found to be accurate while the frequency spectrum of the upstream flow is not well captured due to failure of the upstream RANS-LES interface to produce correct velocity scales. However, the body induced turbulence is well captured in the fluctuating pressure coefficients.

KW - Embedded LES

KW - Turbulent boundary layer flow

KW - Floor-mounted cube

M3 - Paper

T2 - The Seventh International Colloquium on Bluff Body Aerodynamics and Applications

Y2 - 2 September 2012 through 6 September 2012

ER -

Embedded-LES and experiment of turbulent boundary layer flow around a floor-mounted cube

Abstract

Conference

Keywords

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