(10 points) Design a settling chamber to collect particles 50 um in diameter and 111 Ib/ft in density from an air stream with a volumetric flow of 8ft/s. The cross sectional area of the square inlet is 9 ft. Assuming the gas-stream temperature is 70°F such that the gas density and viscosity are 0 075 Ib/ft and 1 23 v 105 Ih//ft c) resnectively How long must the chamber be to give theoretical perfect collection efficiency? Determine the collection efficiency for 10um particles with the same density.

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