Mass transfer inside spiral coils under laminar flow and possible applications

Hydrodynamics, Residence Time Distribution, and Mass Transfer in Spiral Coils in Series

“…Based on the experimental data, empirical correlations were proposed for Nu as a function of the Prandtl number ( Pr ) and De , valid over the ranges of 2 < De < 1043, 76 < Pr < 298, and 12 < Re < 6013. There are very few studies focused on analyzing the two-phase flow in a spiral coil. − Naphon et al studied the flow field and heat transfer of nanofluids in a spiral reactor by employing the Eularian two-phase model in CFD simulations . They found that the heat transfer is enhanced with an increase in the nanofluid concentration and a decrease in the curvature ratio of the spiral.…”

“…Abdelmagied computationally studied the effects of the curvature ratio, concentration of Al 2 O 3 nanofluids, and Re on thermofluid characteristics of double 30 and triple 31 spirally coiled heat exchangers. In addition to these cold flow studies, a few authors used spiral coils for biodiesel production through reaction, 32 the synthesis of Ag nanoparticles, 33 catalytic reactions, 27,34 and calcium extraction using ionic liquids. 35 There are several reports available elucidating the heat transfer and flow field in a single spiral.…”