Multi-time-delay LSE-POD complementary approach applied to unsteady high-Reynolds-number near wake flow

2010 ◽  
Vol 49 (3) ◽  
pp. 571-583 ◽  
Author(s):  
V. Durgesh ◽  
J. W. Naughton
Keyword(s):  
Reynolds Number ◽  
Time Delay ◽  
High Reynolds Number ◽  
Wake Flow ◽  
Near Wake ◽  
Complementary Approach ◽  
High Reynolds

Obtaining phase averaged turbulence properties in the near wake of a circular cylinder at high Reynolds number using POD

2007 ◽  
Vol 43 (2-3) ◽  
pp. 341-355 ◽  
Author(s):  
R. Perrin ◽  
M. Braza ◽  
E. Cid ◽  
S. Cazin ◽  
A. Barthet ◽  
...  
Keyword(s):  
Reynolds Number ◽  
Circular Cylinder ◽  
High Reynolds Number ◽  
Near Wake ◽  
High Reynolds

Multi-Time-Delay LSE-POD Complementary Approach Applied to Wake Flow Behind a Bluff Body

2007 ◽  
Author(s):  
Vibhav Durgesh ◽  
Jonathan W. Naughton
Keyword(s):  
Time Delay ◽  
Surface Pressure ◽  
Bluff Body ◽  
Wake Flow ◽  
Time Varying ◽  
Pressure Measurements ◽  
Near Wake ◽  
Time Resolved ◽  
Complementary Approach ◽  
The Time Domain

An understanding of the near wake dynamics of a bluff body is desired to better link base drag reduction observed on these bodies with the coherent structures in the wake. This investigation explores different Linear Stochastic Estimation-Proper Orthogonal Decomposition (LSE-POD) methods that can be employed to estimate the dynamics of the energy containing structure. Statistically independent two-dimensional PIV measurements and time-resolved surface pressure measurements are used to determine spatial POD modes and LSE coefficients for estimating the time-varying POD coefficients using measured surface pressures. These results are used with the time-resolved surface pressure measurements to estimate the time-varying POD coefficients that may be used for a low-order, time-resolved reconstruction of the flow field. The multi-time LSE approach formulated in the time domain (multi-time-delay LSE) is found to be successful in capturing the important near wake dynamics.

Near-Wake Turbulence Properties around a Circular Cylinder at High Reynolds Number

2003 ◽  
Vol 71 (1-4) ◽  
pp. 19-34 ◽  
Author(s):  
H. Djeridi ◽  
M. Braza ◽  
R. Perrin ◽  
G. Harran ◽  
E. Cid ◽  
...  
Keyword(s):  
Reynolds Number ◽  
Circular Cylinder ◽  
High Reynolds Number ◽  
Near Wake ◽  
Wake Turbulence ◽  
High Reynolds
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