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Measurements of a turbulent boundary layer-compliant surface system in response to targeted, dynamic roughness forcing

Huynh, David and McKeon, Beverley (2020) Measurements of a turbulent boundary layer-compliant surface system in response to targeted, dynamic roughness forcing. Experiments in Fluids, 61 (4). Art. No. 94. ISSN 0723-4864. https://resolver.caltech.edu/CaltechAUTHORS:20200316-150528520

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Abstract

A series of experiments have been performed to study the response of a compliant (gelatin) surface to a turbulent boundary layer that has been forced by dynamic roughness. Through the synthetic flow structure generated by dynamic roughness, this work reduces the complexity of the fluid–structural problem in order to develop a fundamental framework with which to study flow control mechanisms. Flow velocity and surface deformations are measured using 2D particle image velocimetry and stereo digital image correlation, respectively. Both measurement methods are phase-locked to the roughness motion to allow the phase-averaged velocity and deformation fields to be isolated and correlated. The surface response of the non-dynamic roughness forced system is analyzed, and several spectral features are characterized. This analysis is used as context for the roughness forced deformations, subsequently confirming the response of the compliant surface to the synthetic flow mode. This demonstrates the potential of dynamic roughness experiments for studying flow control schemes and sets the stage for more detailed investigations of the effect of the compliant surface on the synthetic flow mode.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1007/s00348-020-2933-9DOIArticle
https://rdcu.be/b23QWPublisherFree ReadCube access
ORCID:
AuthorORCID
McKeon, Beverley0000-0003-4220-1583
Additional Information:© 2020 Springer Nature. Received: 30 August 2019 / Revised: 18 December 2019 / Accepted: 28 February 2020. The support of ONR under Grant Number N00014-17-1-2960 is gratefully acknowledged.
Group:GALCIT
Funders:
Funding AgencyGrant Number
Office of Naval Research (ONR)N00014-17-1-2960
Issue or Number:4
Record Number:CaltechAUTHORS:20200316-150528520
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20200316-150528520
Official Citation:Huynh, D., McKeon, B. Measurements of a turbulent boundary layer-compliant surface system in response to targeted, dynamic roughness forcing. Exp Fluids 61, 94 (2020). https://doi.org/10.1007/s00348-020-2933-9
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:101927
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:17 Mar 2020 15:11
Last Modified:17 Mar 2020 15:11

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