Imperial College London

ProfessorSpencerSherwin

Faculty of EngineeringDepartment of Aeronautics

Professor of Computational Fluid Mechanics
 
 
 
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Contact

 

+44 (0)20 7594 5052s.sherwin Website

 
 
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Location

 

313BCity and Guilds BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@inproceedings{Moxey:2015,
author = {Moxey, D and Feldman, Y and Perdikaris, P and Insley, J and Yakhot, A and Sherwin, S and Karniadakis, G},
title = {Proper orthogonal decomposition analysis of a puff in a pipe},
year = {2015}
}

RIS format (EndNote, RefMan)

TY  - CPAPER
AB - We have performed direct numerical simulations of transitional turbulence in pipe flow for Re=2,250. The results confirm the existence of a spatio-temporal intermittency when turbulence is localized in a puff convected downstream. To analyze the turbulence, we follow a turbulent puff by a 3D moving-window centered at the location of the maximum total energy of transverse (turbulent) motion. The flow field data collected over 6,000 time instances (snapshots) have been analyzed by Proper Orthogonal Decomposition (POD) and used for identifying vortical structures. The presence of large-scale structures in a puff has been found by time-averaging of the cross-sectional turbulent velocity field and confirmed by POD analysis and by applying the Q- and λ2-criteria.
AU - Moxey,D
AU - Feldman,Y
AU - Perdikaris,P
AU - Insley,J
AU - Yakhot,A
AU - Sherwin,S
AU - Karniadakis,G
PY - 2015///
TI - Proper orthogonal decomposition analysis of a puff in a pipe
ER -