Based on the size distribution of water particles in the sprayed water mist, fine water mist can be divided into three categories: Category I fine water mist: The cumulative percentage volume distribution curve lies entirely to the left of the line connecting Dv0.1 = 100 μm and Dv0.9 = 200 μm, representing the finest water mist.
Category II fine water mist: This is a portion of the cumulative percentage volume distribution curve, located outside the Category I spray boundary, but entirely to the left of the line connecting Dv0.1 = 200 μm and Dv0.9 = 400 μm. This type of fine water mist can be generated by pressure jet nozzles, two-phase flow nozzles, and many impact nozzles. Due to the presence of larger water droplets, Category II fine water mist is more likely to produce larger flow rates.
Class III fine water mist: Dv0.9 is greater than 400μm, or any part of the curve exceeds the right side of the Class II boundary line (but Dv0.9 < 1000μm). This type of fine water mist is mainly generated by medium-pressure, small-orifice nozzles and various impact nozzles, and they can achieve a large flow rate.
