5 papers
Effects of spatially localised pressure gradient histories on recovery of turbulent boundary layers
Zefanya Bramantasaputra, Dea Daniella Wangsawijaya, Bharathram Ganapathisubramani
Hot-wire anemometry is used to investigate the recovery of smooth-wall turbulent boundary layers from spatially localised (i.e. impulsive) pressure gradient history (PGH) effects.…
Generalised least squares approach for estimation of the log-law parameters of turbulent boundary layers
M. Aguiar Ferreira, B. Ganapathisubramani
Uncertainty in estimating the log-law parameters is arguably the greatest obstacle to establishing definitive conclusions regarding their numerical values and universality. This ch…
Experimental investigation of ridge-induced secondary motions in turbulent channel flows
Mattias Nilsson-Takeuchi, Bharathram Ganapathisubramani
Many engineering and environmental surfaces exhibit spatial heterogeneity in the spanwise direction and encompass multiple surface length scales. When the dominant spanwise length…
Reynolds number effects on surface-induced secondary flows in turbulent boundary layers
T. Medjnoun, M. Nillson-Takeuchi, B. Ganapathisubramani
This study explores the effect of friction Reynolds number (--) on secondary flows in three-dimensional turbulent boundary layers induced by spanwis…
Effects of pressure gradient histories on skin friction and mean flow of high Reynolds number turbulent boundary layers over smooth and rough walls
Thomas Preskett, Marco Virgilio, Prateek Jaiswal +1
Experiments are conducted over smooth and rough walls to explore the influence of pressure gradient histories on skin friction and mean flow of turbulent boundary layers. Different…