Department of Chemical Engineering, National Institute of Technology, Tiruchirappalli - 620 015, Tamilnadu, India.
NomenclatureC1, C2
Correlation Constants of Fox and Gex (1956)
Djjet diameter, (m)
Ddiameter of tank, (m)
dnozzle diameter, (m)
Fmixing time factor for the correlation of Lane and Rice (1982)
gacceleration due to gravity, (m2/s)
Hheight of the tank, (m)
Qjjet volumetric throughput, (m3/s)
Rejjet Reynolds number
T, Tmmixing time, (s)
xeffective jet length, (m)
yheight of the liquid in the tank, (m)
Vjet velocity, (m/s)
Mixing is an important unit operation carried out in numerous process industries. This paper is concerned with mixing of two liquids in a jet mixer using a single as well as double side entering jets. Different configurations of the jets were investigated, to achieve mixing at a quicker rate than the previous published results. In this study, the performance of a jet mixer and the flow visualizations were also evaluated using Computational Fluid Dynamics (CFD) code FLUENT. The optimum jet inclination was found to be 25°. The best twist of the jets were found to be when the jet 1 was at a twist of 0° and the jet 2 at a twist of 180°. The computational model and results presented here will be useful in the design of mixers for achieving quicker and effective mixing. The above inference was observed for a range of Reynolds number from 4200 to 12000.
Twisted jet, jet inclination, Jet mixer, Mixing, Computational Fluid dynamics
