Forcing frequency effects on turbulence dynamics in pulsatile pipe flow
Z Cheng, TO Jelly, SJ Illingworth, I Marusic, ASH Ooi
International Journal of Heat and Fluid Flow | Elsevier | Published : 2020
The turbulence dynamics of pulsatile pipe flow are investigated using direct numerical simulation (DNS) at a mean friction Reynolds number of 180. Results are presented for a range of forcing frequencies at a fixed amplitude, which, based on existing classifications, corresponds to the current-dominated regime. This work directs attention towards the phase-variations of single and two-point turbulence statistics, with a particular emphasis on the response of the Reynolds shear stress to systematic changes in the applied forcing frequency. The study has yielded two key outcomes. (i) A new frequency classification procedure for pulsatile turbulent flows (at low-to-moderate friction Reynolds nu..View full abstract
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Awarded by Australian Research Council
The authors gratefully acknowledge the support of the Australian Research Council. This research was undertaken using the LIEF HPC-GPGPU Facility hosted at the University of Melbourne. This Facility was established with the assistance of LIEF grant LE170100200. This work was also supported by resources provided by the Pawsey Supercomputing Centre with funding from the Australian Government and the Government of Western Australia.