a method of processing flowable materials . in customary methods of this type , the material is impelled by a rotor immersed in the material , with radial and axial restriction of the movement of the material at the boundary layer of the material in contact with the rotor . such customary methods are hereby improved in that the magnitude and direction of the acceleration impulse imparted to the material are adjusted to the process conditions by changing the configuration of processing implements which extend generally radially out from the rotational axis of the rotor .