02.3 - Basic Fluid Dynamics and Flow Control
STAGGERED THREE-DIMENSIONAL CAVITIES AS A POSSIBLE METHOD FOR SKIN FRICTION DRAG REDUCTION
E.R. Gowree¹, C.J. Atkin¹; ¹City University London, United Kingdom
Turbulent boundary layers over sufficiently large staggered surface perforations show similar behaviour to that over roughness, however, below certain diameters these 3D circular cavities can potentially reduce skin friction drag. The physical mechanism is still not completely understood but it might be similar to that of turbulent flow over riblets or surfaces emulating the texture of shark skin.