Friction reduction in flow over 3D dimples

摘要

A note has been received from G I Kiknadze and I A Gachechiladze, of Inventors Network GmbH, Germany, describing research [Ref 1] during which they discovered secondary tornado-like jets self-organising in water flowing past 3D dimples on the surface of plates. Later, they obtained proof of this phenomenon in air flow [Ref 2]. In Ref 3, for the first time, results of aero-hydrodynamic and thermo-physical experiments were published, indicating significant reduction of hydraulic losses and intensification of heat and mass transfer, with the lower growth of hydraulic resistance accompanying self-organisation of the tornado-like jets.