A centrifugal filtration unit operating at a rotational speed of w has inner surface of the liquid (density ? L ) located at a radial distance R from the axis of rotation. The thickness of the liquid film is ? and no cake is formed. The initial pressure drop during filtration is

A centrifugal filtration unit operating at a rotational speed of w has

1.	A centrifugal filtration unit operating at a rotational speed of w has inner surface of the liquid (density ? L ) located at a radial distance R from the axis of rotation. The thickness of the liquid film is ? and no cake is formed. The initial pressure drop during filtration is
A.	w 2 . R 2 . ? L
B.	w 2 . ? 2 . ? L
C.	w 2 . ?? L (2 R + ?)
D.	w 2 . R . ? L ( R + 2?)
Answer» D. w 2 . R . ? L ( R + 2?)

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A centrifugal filtration unit operating at a rotational speed of w has inner surface of the liquid (density ? L ) located at a radial distance R from the axis of rotation. The thickness of the liquid film is ? and no cake is formed. The initial pressure drop during filtration is

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