required to ter greater than 60 mm are carried upwards with water? 4. A gravity separator (shown in diagram below) can be used to remove solid particles (spherical) from water. The gravity separator comprises of a rectangular shaped chamber with inclined baffles which separate different phases on the basis of their densities. (a) Derive an expression for the ideal collection efficiency of this separator as a function of particle size and properties, separator dimensions, fluid properties and fluid velocity (assumed uniform). (b) Calculate the percent change in collection efficiency when the throughput of water is decreased by a factor of 0.8 and the density of the solid particles changes from 2600 to 2450 kgm Water solid in Water out 8 Solid out Y-Y Section side elevation Section X X and elevation required to ter greater than 60 mm are carried upwards with water? 4. A gravity separator (shown in diagram below) can be used to remove solid particles (spherical) from water. The gravity separator comprises of a rectangular shaped chamber with inclined baffles which separate different phases on the basis of their densities. (a) Derive an expression for the ideal collection efficiency of this separator as a function of particle size and properties, separator dimensions, fluid properties and fluid velocity (assumed uniform). (b) Calculate the percent change in collection efficiency when the throughput of water is decreased by a factor of 0.8 and the density of the solid particles changes from 2600 to 2450 kgm Water solid in Water out 8 Solid out Y-Y Section side elevation Section X X and elevation