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University of Cambridge > Talks.cam > Isaac Newton Institute Seminar Series > Reynolds stress fluctuation properties in the inertial sublayer of canonical turbulent wall-flows

## Reynolds stress fluctuation properties in the inertial sublayer of canonical turbulent wall-flowsAdd to your list(s) Download to your calendar using vCal - Joe Klewicki (University of Melbourne)
- Tuesday 29 March 2022, 09:30-10:00
- Seminar Room 1, Newton Institute.
If you have a question about this talk, please contact nobody. TURW04 - Wall-bounded turbulence: beyond current boundaries Properties of the Reynolds stress fluctuations in the inertial sublayer of canonical turbulent boundary layer, channel and pipe flows are explored. A broader aim here is to investigate if the self-similar properties associated with the mean momentum balance (MMB) in these flows are also reflected in the statistics of the turbulent motions responsible for wall-normal momentum transport. Toward this aim, a succinct summary of analytical properties admitted by the MMBs associated with these flows is used to motivate the study of the $ uv $ fluctuations, where $u$ and $v$ are the streamwise and wall-normal velocity fluctuations, respectively. Statistical properties of primary interest are associated with the time fraction that $ uv $ time series are negative (or equivalently the negative area fraction in a wall-parallel planes), $T_{24}$, the skewness of $uv$, S($uv$), and the $uv$ correlation coefficient, $r$—all of which are properties associated with the underlying $uv$ probability distribution (pdf). These and other properties of the Reynolds stress fluctuations are examined in the inertial sublayer of fully developed channel and pipe flows and zero pressure gradient turbulent boundary layers. The data sources include channel flow direct numerical simulations up to friction Reynolds numbers, $\delta This talk is part of the Isaac Newton Institute Seminar Series series. ## This talk is included in these lists:- All CMS events
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