Experimental investigations of turbulent drag reduction by surface-embedded grooves

摘要

Consideration of near-wall turbulence in the functional space that emphasizes the level of anisotropy of the velocity fluctuations not only provides an understanding of the causative physics behind remarkable effects of turbulent drag reduction, but also leads to the logical design of a surface topology which is shown experimentally to be capable of producing a significant reduction of viscous drag which far exceeds what has been achieved so far.