Hydraulic mean radius for flow through packed bed of spherical particl – McqOptions

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1.	Hydraulic mean radius for flow through packed bed of spherical particle of size, ‘Dp, with porosity ‘ε’ is________________?
A.	(Dp/6) (ε/1- ε)
B.	(Dp/6) (1- ε/ε)
C.	⅔Dp (1- ε/ε)
D.	⅔Dp (ε/1- ε)
Answer» B. (Dp/6) (1- ε/ε)

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