Journal article
Revisiting amplitude modulation in non-canonical wall-turbulence through high-Reynolds number experimental data
Mitchell Lozier, Ivan Marusic, Rahul Deshpande
Physical Review Fluids | American Physical Society | Published : 2024
Abstract
The amplitude modulation phenomena, defined originally by Mathis et al. [J. Fluid Mech. 628, 311 (2009)], corresponds to a unique nonlinear interaction between Reynolds number (Re𝜏) dependent large-scale motions and Re𝜏-invariant inner-scale motions observed in canonical wall-bounded flows. While similar nonlinear interactions have been quantified previously in non-canonical wall-bounded flows, linking them solely to amplitude modulation is questionable due to the fact that each non-canonical effect is associated with distinct variations in the energies of both the large and inner scaled motions. This study revisits analysis of nonlinear triadic interactions, with consideration to various ..
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Grants
Awarded by University of Melbourne
Funding Acknowledgements
We gratefully acknowledge Associate Prof. Ian Jacobi for insightful discussions, and the assistance of Dr. Reza Abbassi and Dr. Dougal Squire with regards to accessing the published experimental datasets. R.D. is grateful for financial support from the University of Melbourne through the Melbourne Postdoctoral Fellowship. R.D. and I.M. gratefully acknowledge funding from the Office of Naval Research (ONR) and ONR Global Grant No. N62909-23-1-2068. M. L.: Writing - original draft, Investigation, Methodology, Validation, Formal analysis. I. M.: Conceptualization, Writing - review & editing, Funding acquisition, Supervision. R. D.: Conceptualization, Methodology, Writing - review & editing, Funding acquisition, Supervision.