Required Minimum Flow Velocity for P Slurries

A theoretical parameter to compare the abrasive settling of slurries and the response time of abrasive particles relative to response time of the fluid [25] 

VPDS is designed on the principle of volumetric blending. These systems cause minimal handling shear on slurry and hence are ideal for shear-sensitive silica slurries. However, special care should be exercised in handling slurries with volatile or decomposing components, which may be affected by repeated vacuum application. 

PPDS works on the principle of metering pumps and employs diaphragm, bellows, centrifugal, or vacuum-pressure-dispense pumps. These systems may be used for slurries including shear-sensitive slurries and cause minimal recirculation during slurry usage and replenishment. 

Such systems may provide dynamic control of slurry blend ratio and integrated slurry metrology. POU blending is most suitable for limited pot-life slurry blends and can provide consistent blend over time, but may have limitations in metrology and advance warning on slurry health changes. 

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