With the coarse magnesium turnings, too, an improvement in Bo can be observed due to the additional oscillation. An increase of the Bodenstein numbers with increasing oscillatory Reynolds number up to Re0 = 1.38 was found for coarse magnesium turnings (figure ). At Re0 = 1.38, a maximum is reached and a further increase of the oscillatory Reynolds number leads to a drop of Bo. Whereas without oscillation a mean Bodenstein number of 47 (pulsation-free pump C) is achieved, with a superimposed oscillation a Bodenstein number of up to 80 is possible, an increase by 70 %. In contrast to the Reynolds number (oscillatory)