Abstract: It is shown for the first time that when a liquid (water) slides along a hydrophobic surface, a turbulent boundary layer does not appear on it. For the first time, the physical reason for the lack of influence of liquid sliding on the reduction of the friction resistance of a textured hydrophobic coating under a turbulent flow regime has been established.

Abstract: The absence of scale factor influence on water sliding in an open tray with a superhydrophobic coating was experimentally established. In this case, the flow of water occurs with the separation of the flow from the side walls.