A settling chamber is used to remove particles from an air flow. Settling chamber height is 3 m and residence time of air in the chamber is 10 s.
(a) What minimum particle-settling velocity is required, if all particles are to be removed?
(b) What is the minimum-size particle that the chamber would remove?
The particle density is 1 g cm-3, air viscosity is 1.69 X 10-4 g cm-1 s-1 , and the air density is small enough that the buoyancy force may be ignored. Express your answer as particle diameter in ion.