An experimental study is presented wherein a cylindrical ultrasonic standing wave field is used to increase the scavenging of micron-scale particles by water fog in an air stream. The cylindrical standing wave field was generated with a cylindrical resonator composed of a metal tube driven by three ultrasonic transducers. The nodes in the resonator took the form of concentric cylinders extending the length of the tube. Experiments conducted with the resonator yielded maximum scavenging coefficients over four times that obtained previously with a disk shaped geometry. The effect of both air flow rate and input power are investigated, and insights are presented on the mechanism of particle removal by drops in the presence of a standing wave field.