Journal article

Statistical properties of streamline geometry in turbulent wall-flows

Rina Perven, Jimmy Philip, Joseph Klewicki

PHYSICAL REVIEW FLUIDS | AMER PHYSICAL SOC | Published : 2021

Abstract

Complex but coherent motions form and rapidly evolve within wall-bounded turbulent flows. Research over the past two decades broadly indicates that the momentum transported across the flow largely derives from the dynamics of these coherent motions. The associated spatial organization, and its inherent connection to the dynamics, motivates the present research on streamline curvature and torsion. All the present results have been calculated and compared using the existing direct numerical simulation databases for boundary layers and channel flows. Here we have investigated the statistical properties of the local curvature (κ) and torsion (τ) of streamlines for the considered wall-bounded flo..

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Grants

Funding Acknowledgements

The authors are grateful to the Australian Research Council (ARC) for the financial support of this research. We are also thankful to Sillero et al. [33] and Del Alamo et al. [34] for making their DNS data sets available.