D

(m)

42.3/D^0.5

Critical (rpm)

V_cataract

(rpm)

0.1

134

107

0.2

95

76

0.3

77

62

0.4

67

54

0.5

60

48

0.6

55

44

0.7

51

40

0.8

47

38

0.9

45

36

1

42

34