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Comparison of Hydrodynamic Behavior of Jet Mixer for Newtonian and Non-Newtonian Fluids

Author Affiliations

  • 1Dept. of Chemical Engineering, EICT Polytechnic College, Tirupur 638 056, Tamilnadu, INDIA
  • 2 Dept. of Chemical Engineering, Kongu Engineering College, Perundurai 638 052, Tamilnadu, INDIA

Res. J. Engineering Sci., Volume 1, Issue (3), Pages 45-51, September,26 (2012)

Abstract

Mixing is an important, even fundamental, operation in nearly all chemical industries. Mixing can usually be achieved by mechanical mixers and Jet mixers. Each of these mixers may be selected based on the operating and installation cost. However jet mixers are preferred, when compared to conventional mixers because they offer several advantages including lower costs of construction, maintenance and operation. Therefore investigation of effective operational parameters is important. In this article the hydrodynamic behavior of jet mixer was studied for Newtonian and non-Newtonian fluid. Experiments were conducted in a cylindrical tank with the shape factor of H/D=1.2. Nozzle diameter and nozzle position for the given geometry were optimized. Effect of nozzle diameter on fractional hold up as well as effect of nozzle position on fractional hold up were studied and compared for Newtonian fluid(tap water) and non-Newtonian fluid(CMC and Guar Gum). From the results, it can be seen that the fractional hold up increases with increase in liquid flow rate for both Newtonian and non-Newtonian fluids. Among the three fluids water shows more holdup than other two fluids at nozzle location 30 cm above the base of the tank for10 mm nozzle. Also the fractional hold up decreases with increase in concentration of the working fluid

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