Mass Transfer with Equilateral Triangular Plate as Turbulence Promoter in Circular Pipe

Mass transfer data were obtained in circular conduit using an electrochemical technique with a potassium ferri-ferro cyanide couple. In circular conduit coaxially placed entry region equilateral triangular plate was used as turbulence promoter. The study comprised of evaluation of mass transfer rates at the outer wall of the electrochemical cell. Mass transfer coefficients were evaluated from the measured limiting currents. The study covered a wide range of geometric parameters such as side of the plate (Sp), thickness of the plate (Tp) and distance of the plate from the entrance of the test section (h). The results revealed that the mass transfer coefficient increased with increase in velocity, side of the plate (Sp), thickness of the plate (Tp) and decreased with increase in distance of the plate from the entrance of the test section (h). Within the range of variables covered, the augmentation achieved in mass transfer coefficients were up to 5.2 fold over the tube flow in absence of promoter. The entire mass transfer data were correlated with g(h) and roughness Reynolds number. The following correlation was reported out of the study. g(h)=1.0308 (Re) (1) 0.2037(2) 0.16571(3) (Sc) Where 1=Sp/d, 2=Tp/d, 3=h/d are dimensionless groups, d is diameter of test section.