2. A helical mixer with an agitator pitch/tank diameter = 1 and with Dt
= 1.83 m
and Da
/Dt
= 0.95 is being used to agitate a viscous fluid having a viscosity of
200000 cp and a density of 950 Kg/m3
. The value 0f N = 03 rev/s. calculate the
mixing time and the power per unit volume.