Wavelet time–frequency analysis of accelerating and decelerating flows in a tube bank

Surface pressure survey in a parallel triangular tube array

“…Mahon and Meskell (2009a) observed large asymmetry in one of the normal triangular arrays (P/d¼ 1.58) investigated and this was attributed to bi-stable flow structures. This effect has also been observed by others; for example Zdravkovich and Stonebanks (1990), Indrusiak et al (2005) and Zdravkovich (1993).…”

Finite mixture model applied in the analysis of a turbulent bistable flow on two parallel circular cylinders

“…The continuous wavelet spectrum was obtained through continuous wavelet transform. The discrete wavelet transform was used to decompose the measured signal in wavelet approximations divided into frequency bands (Indrusiak et al, 2005).…”

“…Wavelet analysis is a useful tool for the study of transient turbulent signals (Indrusiak et al, 2005;Olinto et al, 2009), and especially for the switching phenomenon in two side-by-side cylinders (Alam et al, 2003;Alam and Sakamoto, 2005). The use of wavelets together with flow visualizations can enhance the study of fluid flow phenomena in laboratory conditions.…”

Wavelet analysis of unsteady flows: Application on the determination of the Strouhal number of the transient wake behind a single cylinder

“…For the interpretation of switching flows, wavelet analysis in addition to Fourier analysis was used [19,20]. Wavelet transforms were also used to study the vorticity structure in the far wake downstream of a cylinder [21,22], transient phenomena in tube banks [23] and the bistable flows in tube banks [24].…”

“…The CWT was used to construct the continuous wavelet spectrum. The DWPT was used to decompose the measured signal in wavelet approximations at successive frequency intervals [23]. Mathematical tools were developed using the Matlab Ò software.…”