NEW MODEL OF FLOW IN A FARREL CONTINUOUS MIXER

A model for flow in a Farrel Continuous Mixer based upon cylindrical c oordinate hydrodynamic lubrication theory is presented. Pressure and f lux fields over the rotor surface are calculated. The pumping characte ristics of the various sections of the machine rotors were calculated. Generally Farrel Continuous Mixers are operated under starved conditi ons. Calculations are presented for continuous mixers operating under starved conditions. Pressure and fill factor profiles are determined. Fill factors are predicted to be increased by increasing throughput, i ncreasing exit gate pressure and reducing screw speed.