BUBBLE FORMATION AND WEEPING AT A SUBMERGED ORIFICE

Potential flow theory is used to describe the flow of gas from the chamber beneath a one-holed perforated plate into an expanding, rising, spherical bubble forming at the orifice. Bubble size and frequency are determined as functions of hole gas velocity, chamber volume and system physical properties. Weeping is shown to occur after bubble detachment, and the theory allows quantitative estimation of weeping rates and weep points for a single hole. Supporting data are presented for the air-water system. © 1969.