Imperial College London
Alternate

Dr Chris Cantwell

Faculty of Engineering, Department of Aeronautics

Senior Lecturer in Aeronautics
 
 
 
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Contact

 

+44 (0)20 7594 5050c.cantwell Website

 
 
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Location

 

Department of Aeronautics, Room 219City and Guilds BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Cantwell:2010:10.1103/PhysRevE.82.026315,
author = {Cantwell, CD and Barkley, D},
doi = {10.1103/PhysRevE.82.026315},
journal = {Physical Review E},
title = {Computational study of subcritical response in flow past a circular cylinder},
url = {http://dx.doi.org/10.1103/PhysRevE.82.026315},
volume = {82},
year = {2010}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Flow past a circular cylinder is investigated in the subcritical regime, below the onset of Bénard-von Kármánvortex shedding at Reynolds number Rec 47. The transient response of infinitesimal perturbations is computed.The domain requirements for obtaining converged results is discussed at length. It is shown that energyamplification occurs as low as Re=2.2. Throughout much of the subcritical regime the maximum energyamplification increases approximately exponentially in the square of Re reaching 6800 at Rec. The spatiotemporalstructure of the optimal transient dynamics is shown to be transitory Bénard-von Kármán vortex streets.At Re 42 the long-time structure switches from exponentially increasing downstream to exponentially decayingdownstream. Three-dimensional computations show that two-dimensional structures dominate the energygrowth except at short times.
AU  - Cantwell,CD
AU  - Barkley,D
DO  - 10.1103/PhysRevE.82.026315
PY  - 2010///
TI  - Computational study of subcritical response in flow past a circular cylinder
T2  - Physical Review E
UR  - http://dx.doi.org/10.1103/PhysRevE.82.026315
UR  - http://pre.aps.org/abstract/PRE/v82/i2/e026315
VL  - 82
ER  -
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