Large-eddy simulations of a separation/reattachment bubble in a turbulent-boundary-layer subjected to a prescribed upper-boundary, vertical-velocity profile

Wan Cheng; D. I. Pullin; Ravindra Samtaney

Large-eddy simulations of a separation/reattachment bubble in a turbulent-boundary-layer subjected to a prescribed upper-boundary, vertical-velocity profile

Wan Cheng, D. I. Pullin, Ravindra Samtaney

Physical Sciences and Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

We describe large-eddy simulations of turbulent boundary-layer flow over a flat plate at high Reynolds number in the presence of an unsteady, three-dimensional flow separation/reattachment bubble. The stretched-vortex subgrid-scale model is used in the main flow domain combined with a wall-model that is a two-dimensional extension of that developed by Chung & Pullin (2009). Flow separation and re-attachment of the incoming boundary layer is induced by prescribing wall-normal velocity distribution on the upper boundary of the flow domain that produces an adverse-favorable stream-wise pressure distribution at the wall. The LES predicts the distribution of mean shear stress along the wall including the interior of the separation bubble. Several properties of the separation/reattachment flow are discussed.

Original language	English (US)
Title of host publication	Proceedings of Ninth International Symposium on Turbulence and Shear Flow Phenomena (TSFP-9)
State	Published - Jan 1 2015

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title = "Large-eddy simulations of a separation/reattachment bubble in a turbulent-boundary-layer subjected to a prescribed upper-boundary, vertical-velocity profile",

abstract = "We describe large-eddy simulations of turbulent boundary-layer flow over a flat plate at high Reynolds number in the presence of an unsteady, three-dimensional flow separation/reattachment bubble. The stretched-vortex subgrid-scale model is used in the main flow domain combined with a wall-model that is a two-dimensional extension of that developed by Chung & Pullin (2009). Flow separation and re-attachment of the incoming boundary layer is induced by prescribing wall-normal velocity distribution on the upper boundary of the flow domain that produces an adverse-favorable stream-wise pressure distribution at the wall. The LES predicts the distribution of mean shear stress along the wall including the interior of the separation bubble. Several properties of the separation/reattachment flow are discussed.",

author = "Wan Cheng and Pullin, {D. I.} and Ravindra Samtaney",

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Large-eddy simulations of a separation/reattachment bubble in a turbulent-boundary-layer subjected to a prescribed upper-boundary, vertical-velocity profile. / Cheng, Wan; Pullin, D. I.; Samtaney, Ravindra.
Proceedings of Ninth International Symposium on Turbulence and Shear Flow Phenomena (TSFP-9). 2015.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - Large-eddy simulations of a separation/reattachment bubble in a turbulent-boundary-layer subjected to a prescribed upper-boundary, vertical-velocity profile

AU - Cheng, Wan

AU - Pullin, D. I.

AU - Samtaney, Ravindra

N1 - KAUST Repository Item: Exported on 2020-04-23

PY - 2015/1/1

Y1 - 2015/1/1

N2 - We describe large-eddy simulations of turbulent boundary-layer flow over a flat plate at high Reynolds number in the presence of an unsteady, three-dimensional flow separation/reattachment bubble. The stretched-vortex subgrid-scale model is used in the main flow domain combined with a wall-model that is a two-dimensional extension of that developed by Chung & Pullin (2009). Flow separation and re-attachment of the incoming boundary layer is induced by prescribing wall-normal velocity distribution on the upper boundary of the flow domain that produces an adverse-favorable stream-wise pressure distribution at the wall. The LES predicts the distribution of mean shear stress along the wall including the interior of the separation bubble. Several properties of the separation/reattachment flow are discussed.

AB - We describe large-eddy simulations of turbulent boundary-layer flow over a flat plate at high Reynolds number in the presence of an unsteady, three-dimensional flow separation/reattachment bubble. The stretched-vortex subgrid-scale model is used in the main flow domain combined with a wall-model that is a two-dimensional extension of that developed by Chung & Pullin (2009). Flow separation and re-attachment of the incoming boundary layer is induced by prescribing wall-normal velocity distribution on the upper boundary of the flow domain that produces an adverse-favorable stream-wise pressure distribution at the wall. The LES predicts the distribution of mean shear stress along the wall including the interior of the separation bubble. Several properties of the separation/reattachment flow are discussed.

UR - http://hdl.handle.net/10754/566965

UR - ftp://tepeu.sisal.unam.mx/TSFP9/full_paper/9D-1.pdf

M3 - Conference contribution

AN - SCOPUS:85034440440

BT - Proceedings of Ninth International Symposium on Turbulence and Shear Flow Phenomena (TSFP-9)

ER -

Large-eddy simulations of a separation/reattachment bubble in a turbulent-boundary-layer subjected to a prescribed upper-boundary, vertical-velocity profile

Abstract

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