Turbulent transition by photon-correlation spectroscopy

P. Tong, W. I. Goldburg, C. K. Chan, A. Sirivat

Research output: Contribution to journalArticlepeer-review

47 Scopus citations


The technique of photon-correlation spectroscopy was exploited to study turbulent pipe flow behind a grid. We measure the correlation function g(t) of the light intensity scattered by small particles suspended in the turbulent fluid. The results imply that the probability distribution function for the small relative velocity fluctuations in the turbulent grid flow is Lorentzian-like. The statistical properties of the small velocity fluctuations over varying length scales possess a self-similar feature. This self-similarity was seen only when the Reynolds number becomes larger than a specific value scrRc. All the measurements suggest that the flow changes its character at this point.

Original languageEnglish
Pages (from-to)2125-2133
Number of pages9
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Issue number6
StatePublished - 1988


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