Air with density of 1.22kg/m3, viscosity of 1.9105 Pa.s is flowing in a fixed bed of a diameter 0.5m and length 3m. The bed is packed with spherical particles of diameter 8mm. The void fraction is 0.5 . The air mass flow rate is 0.8kg/s. Calculate pressure drop if fluid is having superficial velocity of 2.5m/s. Take sphericity value as one. [7]