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Nonlinear interactions isolated through scale synthesis in experimental wall turbulence

Duvvuri, Subrahmanyam and McKeon, Beverley (2016) Nonlinear interactions isolated through scale synthesis in experimental wall turbulence. Physical Review Fluids, 1 (3). Art. No. 032401(R). ISSN 2469-990X. doi:10.1103/PhysRevFluids.1.032401.

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An experimental investigation of nonlinear scale interactions in a forced turbulent boundary layer is presented here. A dynamic wall perturbation mechanism was used to externally force two distinct large-scale synthetic modes with well-defined spatial and temporal wave numbers in a fully turbulent flow. The focus is on characterizing the nonlinear flow response at triadically consistent wave numbers that arises from the direct interactions of the two synthetic modes. These experimental results isolate triadic scale interactions in wall turbulence in a unique fashion, and provide the ability to explore the dynamics of scale coupling in a systematic and detailed manner. The ideas advanced here are intended to contribute towards modeling efforts of high-Reynolds-number wall turbulence.

Item Type:Article
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URLURL TypeDescription
Duvvuri, Subrahmanyam0000-0001-8082-1658
McKeon, Beverley0000-0003-4220-1583
Additional Information:© 2016 American Physical Society. (Received 8 April 2016; published 15 July 2016) We gratefully acknowledge AFOSR (Grant No. FA 9550-12-1-0469, program manager D. Smith) for financial support of this work and a graduate fellowship (S.D.) from the Resnick Institute at Caltech. We also thank K. Rosenberg and D. Huynh for their help with the wind tunnel experimental setup.
Group:Resnick Sustainability Institute, GALCIT
Funding AgencyGrant Number
Air Force Office of Scientific Research (AFOSR)FA 9550-12-1-0469
Resnick Sustainability InstituteUNSPECIFIED
Issue or Number:3
Record Number:CaltechAUTHORS:20160729-122826684
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Official Citation:Nonlinear interactions isolated through scale synthesis in experimental wall turbulence Subrahmanyam Duvvuri and Beverley McKeon Phys. Rev. Fluids 1, 032401(R)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:69315
Deposited By: George Porter
Deposited On:29 Jul 2016 20:06
Last Modified:11 Nov 2021 04:12

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