Experimental Study on Process Intensification of Mass Transfer Coefficients with Coaxially Placed and Perpendicularly Rotated Novel Turbulence Promoters in Circular Conduits

Abstract

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   surface promoters, insert promoters, swirl generators, different geometric shaped conduits and additives etc. Among the above, insert promoters are employed with advantages of easy fabrication, operation and maintenance. 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 this work it is proposed to employ perpendicularly assembled and rotated twisted tapes with grooves as insert promoter. The following correlation was reported out of the study.

jd = 0.25736*10^-4 (Re_m)^-0.8808 (f₁)^-1.1127(f₂)^0.1441 (Sc)^5.1610