This book discusses the effect of inlet flowrate and rotor speed on the size of the droplet through Sauter mean diameter. The 2 systems considered are the 2-tank and recycle systems. The 3 main objectives are: To determine the relationship between the droplet size and the rotational speed of the rotor-stator mixer, To determine the relationship between the droplet size and the inlet pump flowrate, To understand the effectiveness of the continuous system to the batch system.