Imperial College London
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ProfessorSergeiChernyshenko

Faculty of Engineering, Department of Aeronautics

Chair in Aerodynamics
 
 
 
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Contact

 

+44 (0)20 7594 5548s.chernyshenko Website

 
 
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Location

 

211aCity and Guilds BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Zhang:2016:10.1103/PhysRevFluids.1.014401,
author = {Zhang, C and Chernyshenko, SI},
doi = {10.1103/PhysRevFluids.1.014401},
journal = {Physical Review Fluids},
title = {Quasi-steady quasi-homogeneous description of the scale interactions in near-wall turbulence},
url = {http://dx.doi.org/10.1103/PhysRevFluids.1.014401},
volume = {1},
year = {2016}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - By introducing a notion of an ideal large-scale filter, a formal statement is given of the hypothesis of the quasi-steady quasi-homogeneous nature of the interaction between the large and small scales in the near-wall part of turbulent flows. This made the derivations easier and more rigorous. A method is proposed to find the optimal large-scale filter by multi-objective optimization, with the first objective being a large correlation between large-scale fluctuations near the wall and in the layer at a certain finite distance from the wall, and the second objective being a small correlation between the small scales in the same layers. The filter was demonstrated to give good results. Within the quasi-steady quasi-homogeneous theory expansions for various quantities were found  with respect to the amplitude of the large-scale fluctuations. Including the higher-order terms improved the agreement with numerical data. Interestingly, it turns out that the quasi-steady quasi-homogeneous theory implies a dependence of the mean profile log-law constants on the Reynolds number. The main overall result of the present work is the demonstration of the relevance of the quasi-steady quasi-homogeneous theory for near-wall turbulent flows.
AU  - Zhang,C
AU  - Chernyshenko,SI
DO  - 10.1103/PhysRevFluids.1.014401
PY  - 2016///
SN  - 2469-990X
TI  - Quasi-steady quasi-homogeneous description of the scale interactions in near-wall turbulence
T2  - Physical Review Fluids
UR  - http://dx.doi.org/10.1103/PhysRevFluids.1.014401
UR  - https://journals.aps.org/prfluids/abstract/10.1103/PhysRevFluids.1.014401
UR  - http://hdl.handle.net/10044/1/30997
VL  - 1
ER  -
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