Enhancement of mass transfer coefficient by using of single pentagonal plate as turbulence promoter in circular conduit

Abstract

Abstract Studies on enhancement of mass transfer coefficient by using single pentagonal plate as promoter inserted at the bottom of the rectangular electrolytic cell have been conducted. The present study contains the assessment of mass transfer rates increases by using single pentagonal plate as turbulent promoter in forced convection flow of electrolyte and it was evaluated from measured limiting current technique. The electrolyte was equimolar ferri- ferrocynide couple in alkaline solution. The mass transfer rates obtained due to diffuse control mechanism. The present study covers effects of height (h) and radius (r) of the promoters, space between the promoters and flow rate of electrolyte on mass transfer. The results have revealed that the velocity (v) increases then mass transfer coefficient increases, if radius of the plate (r) increases then also mass transfer coefficient increases and transfer coefficient increases when decreases in height (h) of the plate from entrance of the rectangular electrolytic cell (h). From the results maximum augmentation is 3.96 times more than the smooth tube and the minimum augmentation is 2.20 times more than the smooth tube. Present study was analysed with mass transfer function and Reynolds’s number. The correlation achieved is JD = 674.26 (Re)−0.96496 (Φ1)0.56634 (Φ2)0.13874 (Φ3)−0.53239 (Sc)−0.088446.