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Agitator Design: cowles disperser
Mixing impeller / agitator design data — power number (Np), flow number (Nq), D/T ratio, tip speed, and application guidance for Rushton turbine, pitched blade, hydrofoil, anchor, helical ribbon, marine propeller, Cowles disperser, retreat curve, and rotor-stator high-shear mixer impellers
| impeller type | D T ratio max (dimensionless) | D T ratio min (dimensionless) | Re turbulent threshold (dimensionless) | application | flow number Nq (dimensionless) | flow pattern | power number Np (dimensionless) | tip speed ft s max (ft/s) | tip speed ft s min (ft/s) | tip speed typical ft s (ft/s) |
|---|---|---|---|---|---|---|---|---|---|---|
| cowles disperser | 0.45 | 0.3 | 10,000 | Pigment/filler dispersion; paint/coating manufacturing; ink grinding; cosmetics dispersion; wetting powders into liquid | 0.32 | radial high-shear | 0.45 | 25 | 15 | 20 |
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