The effect of baffles on the minimum power required
to destroy IMRs are presented in Fig. 9 for three different
impellers. Under baffled conditions, at Rec, the power input
for all the impellers is approximately equal. Under unbaffled
condition, the axial-flow impeller (PR30) is much less efficient
than other two impellers. Based on Fig. 9, the power required
to accomplish the homogenous condition in the baffled tank is
approximately 5 times higher than that for the unbaffled tank