IONIC MASS TRANSFER STUDIES AT THE WALL OF CYLINDRICAL VESSEL WITH GROOVED TWISTED TAPE PROMOTERS

Augmentation in transfer processes reduces the equipment sizes, increasing throughputs and operating costs. Various techniques hitherto adopted to obtain enhancements are by the use of [A] i) surface promoters ii) insert promoters iii) swirl generators iv) different geometric shaped conduits and (v) additives [B] Vibration of the reacting surface [C] Pulsation or rotation of fluid [D] Application of two or three phase flow. In case of insert promoters the flow fields vary with the shape of the promoter and they are generally complex and are not easily amenable to mathematical analysis. In such cases one has to resort to obtain accurate experimental data, analyze the data in terms of dimensionless groups and appropriately relate them. In earlier investigations where twisted tapes as swirl generators, discs and string of discs were employed as promoters, showed a significant augmentation in momentum and mass transfer rates. In present paper, it is proposed to employ perpendicularly assembled twisted tapes with grooves as insert promoter.