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Agitator Design: anchor
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 | ht constant a (dimensionless) | ht constant a high re (dimensionless) | ht exponent b type | ht exponent b type high re | ht re range | ht re range high re | ht viscosity correction m (dimensionless) | 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) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| anchor | 0.98 | 0.9 | 100 | High-viscosity blending; wall heat transfer; non-Newtonian | 0.2 | radial | 1 | 0.36 | a | w | 10-300 | 300-40000 | 0.18 | 0.35 | 3 | 0.5 | 1 |
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