3. (7%) A packed bed is composed of cylinders having a diameter D=0.02 m and a length h=D. The bulk density
of the overall packed bed is 962 kg/m3 and the density of the solid cylinders is 1600 kg/m3.
申論題內容
(c) (2 pts) Calculate the ratio of total surface area in the bed to total volume of bed in m"