Imperial College London
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Emeritus ProfessorMichaelLeschziner

Faculty of Engineering, Department of Aeronautics

Emeritus Professor
 
 
 
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Contact

 

+44 (0)20 7594 5061mike.leschziner Website

 
 
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Location

 

CAGB317ACity and Guilds BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Agostini:2017:10.1080/14685248.2017.1328108,
author = {Agostini, L and Leschziner, M and Poggie, J and Bisek, NJ and Gaitonde, D},
doi = {10.1080/14685248.2017.1328108},
journal = {Journal of Turbulence},
pages = {760--780},
title = {Multi-scale interactions in a compressible boundary layer},
url = {http://dx.doi.org/10.1080/14685248.2017.1328108},
volume = {18},
year = {2017}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - The properties of spectral subranges of scales in a boundary layer at Mach=2.3 and friction Reynolds number Reτ = 570 are investigated by analysing DNS data. One major aim is to examine whether footprinting and modulation of small-scale near-wall motions by outer large structures, observed at high Reynolds numbers, also pertain to this low-Reynolds-number case, or whether the logarithmic layer simply contains a continuous hierarchy of motions without specific outer scales playing a distinctive role. To this end, the spectrum of scales is decomposed into modes by application of the “Empirical Mode Decomposition”. The properties of different scales are then investigated by means of spectra, maps of isotropy/anisotropy parameters, the premultiplied derivative of the second-order structure function, correlation coefficients and joint probability density function (PDF), the last constructed from conditionally sampled data for the small-scale motions within the large-scale footprints. A clear commonality is identified between interactions in high-Reynolds-number channel flow and the present low-Reynolds-number boundary layer.
AU  - Agostini,L
AU  - Leschziner,M
AU  - Poggie,J
AU  - Bisek,NJ
AU  - Gaitonde,D
DO  - 10.1080/14685248.2017.1328108
EP  - 780
PY  - 2017///
SN  - 1468-5248
SP  - 760
TI  - Multi-scale interactions in a compressible boundary layer
T2  - Journal of Turbulence
UR  - http://dx.doi.org/10.1080/14685248.2017.1328108
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000404261500002&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - http://hdl.handle.net/10044/1/53724
VL  - 18
ER  -
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