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Phase relations in a forced turbulent boundary layer: implications for modelling of high Reynolds number wall turbulence

Duvvuri, Subrahmanyam and McKeon, Beverley (2017) Phase relations in a forced turbulent boundary layer: implications for modelling of high Reynolds number wall turbulence. Philosophical Transactions A: Mathematical, Physical and Engineering Sciences, 375 (2089). Art. No. 20160080. ISSN 1364-503X . http://resolver.caltech.edu/CaltechAUTHORS:20170213-124117937

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Abstract

Phase relations between specific scales in a turbulent boundary layer are studied here by highlighting the associated nonlinear scale interactions in the flow. This is achieved through an experimental technique that allows for targeted forcing of the flow through the use of a dynamic wall perturbation. Two distinct large-scale modes with well-defined spatial and temporal wavenumbers were simultaneously forced in the boundary layer, and the resulting nonlinear response from their direct interactions was isolated from the turbulence signal for the study. This approach advances the traditional studies of large- and small-scale interactions in wall turbulence by focusing on the direct interactions between scales with triadic wavenumber consistency. The results are discussed in the context of modelling high Reynolds number wall turbulence.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1098/rsta.2016.0080DOIArticle
http://rsta.royalsocietypublishing.org/content/375/2089/20160080PublisherArticle
ORCID:
AuthorORCID
Duvvuri, Subrahmanyam0000-0001-8082-1658
McKeon, Beverley0000-0003-4220-1583
Additional Information:© 2017 The Author(s). Published by the Royal Society. Accepted October 14, 2016. This article is part of the themed issue ‘Toward the development of high-fidelity models of wall turbulence at large Reynolds number’. The support of AFOSR under grant no. FA9550-12-1-0469 is gratefully acknowledged. Data accessibility: Experimental data associated with this study are available on request from the corresponding author. Authors' contributions: S.D. carried out the experiments and data analysis. S.D. and B.J.M. formulated the approach and the discussion. Both authors contributed to the manuscript and have approved it. We declare we have no competing interests.
Group:GALCIT
Funders:
Funding AgencyGrant Number
Air Force Office of Scientific Research (AFOSR)FA9550-12-1-0469
Subject Keywords:turbulent boundary layers; targeted forcing; synthetic scales; triadic scale interactions; wave packets; phase relations
Record Number:CaltechAUTHORS:20170213-124117937
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20170213-124117937
Official Citation:Phase relations in a forced turbulent boundary layer: implications for modelling of high Reynolds number wall turbulence Subrahmanyam Duvvuri, Beverley McKeon Phil. Trans. R. Soc. A 2017 375 20160080; DOI: 10.1098/rsta.2016.0080. Published 6 February 2017
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:74246
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:13 Feb 2017 21:06
Last Modified:13 Feb 2017 21:06

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