(332i) Studies on Mass Transfer with Coaxially Placed Entry Region Coils as Turbulence Promoter in Circular Conduits

Studies on the augmentation of mass transfer due to the presence of coaxially placed entry region coils were presented in this paper. The range of flow conditions have been covered: Reynolds numbers from 1200 to 14,000 and Schmidt number from 800 to 1300. Coils were tested within a geometrical pitch 0.015, 0.025, 0.035 m and coil length 0.065, 0.095, 0.125 m. Results have shown that coils increased augmentation up to three times compared to the empty smooth tube. Entry region coil inserts show a considerable advantage over other enhancement techniques. A model was developed in terms of flow and geometric parameters and presented. .