Experimental investigation on underwater drag reduction using partial cavitation

Wang Bao¹, Wang Jiadao^{1, †}, Chen Darong¹, Sun Na^{1, 2}, Wang Tao^{1, 3}

(color online) Schematic diagram of the state at microgrooved structures. (a) The distance between two neighbouring grooves is large, so the bubbles are independent; (b) with dense microgrooved structures, the cavities can combine together.