Abstract
A modification to the phase-jitter calculation procedure of Ho et al. (J Fluid Mech 230:319–337, 1991), called the HZFB method (Ho, Zohar, Foss, and Buell), and an extension of the pattern recognition technique for phase-jitter calculation are presented in this work. Results for the phase jitter calculated using the three methods are compared for a separated shear layer past a surface-mounted rib. The original HZFB method is shown to yield inaccurate results in the presence of small-scale turbulence, while the modified HZFB method and the pattern recognition technique provide the correct estimates of phase jitter.
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References
Ho CM, Zohar Y, Foss JK, Buell JC (1991) Phase decorrelation of coherent structures in a free shear layer. J Fluid Mech 230:319–337
Panigrahi PK (1998) Perturbed shear layers in ribbed duct. Dissertation, Louisiana State University, Baton Rouge, La.
Zhou MD, Heine C, Wygnanski I (1996) The effects of excitation on the coherent and random motion in a plane wall jet. J Fluid Mech 310:1–37
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Acharya, S., Panigrahi, P.K. Analysis of phase-jitter evolution in a reattaching shear layer. Exp Fluids 35, 237–239 (2003). https://doi.org/10.1007/s00348-003-0617-x
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DOI: https://doi.org/10.1007/s00348-003-0617-x