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Scale interactions and 3D critical layers in wall-bounded turbulent flows

Saxton-Fox, Theresa and McKeon, Beverley (2016) Scale interactions and 3D critical layers in wall-bounded turbulent flows. In: 24th International Congress of Theoretical and Applied Mechancs, August 21-26, 2016, Montreal, Canada. (Submitted)

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Phenomena related to scale interaction in wall-bounded turbulent flows were considered through the lens of critical layer analysis. A 3D critical layer formulation was used, with the 3D critical layer associated with a particular structure defined as the height where the instantaneous velocity field composed of the large scales and the mean velocity matched the convection velocity of that structure. Characterization of the velocity field surrounding the 3D critical layer in wall-bounded turbulent flows led to conclusions consistent with previously observed phenomena including the shape of the interface defining uniform momentum zones (UMZs) [1] [2] and amplitude modulation of the small scales by the large scales [5]. The use of a 3D critical layer formulation in wall-bounded turbulent flows may lead to improved modeling of small scale activity in reduced order models and LES.

Item Type:Conference or Workshop Item (Paper)
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URLURL TypeDescription paper summary
Saxton-Fox, Theresa0000-0003-1328-4148
Additional Information:The support of an NDSEG fellowship (TSF) and AFOSR (grant FA9550-12-1-0060) is gratefully acknowledged.
Funding AgencyGrant Number
National Defense Science and Engineering Graduate (NDSEG) FellowshipUNSPECIFIED
Air Force Office of Scientific Research (AFOSR)FA9550-12-1-0060
Subject Keywords:Turbulence ; Critical layer
Record Number:CaltechAUTHORS:20171128-101726402
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:83497
Deposited By: Katherine Johnson
Deposited On:28 Nov 2017 22:23
Last Modified:03 Oct 2019 19:07

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