air with density of 1.22 kg/m3, viscosity of 1.9 X 10 -5 Pa.s is flowing in a fixed bed of a diameter 0.5 m and length 3 m. The bed is packed with velocity of 2.5m/s.Take sphericity value as one. spherical particles of diameter 8 mm. The void fraction is 0.5. The air mass flow rate is 0.8 kg/s. Calculate pressure drop if fuid is having superficial 7] 2023/