Korean Journal of Chemical Engineering

, Volume 28, Issue 2, pp 502–506 | Cite as

Mass transfer and shear rate in baffled surface aerator

  • Bimlesh Kumar
  • Ajey Kumar Patel
  • Achanta Ramakrishna Rao
Invited Review Paper


The scale up or scale down of the process variables in a surface aerator requires information about the shear rate prevailing in the system. In fact, the performance of surface aerator depends upon the shear rate. Shear rate affects the mass transfer operation needed by the surface aerator. Theoretical analysis of shear rate suggests a nonlinear behavior with rotational speed of the impeller, which has been shown in the present work. Present work also shows that in a geometrically similar system of baffled surface aerator, shear rate can be used as a governing parameter for scaling up or down the mass transfer phenomena.

Key words

Mass Transfer Rate Mixing Power Number Shear Rate Surface Aeration 


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Copyright information

© Korean Institute of Chemical Engineers, Seoul, Korea 2010

Authors and Affiliations

  • Bimlesh Kumar
    • 1
  • Ajey Kumar Patel
    • 2
  • Achanta Ramakrishna Rao
    • 2
  1. 1.Department of Civil EngineeringIndian Institute of TechnologyGuwahatiIndia
  2. 2.Department of Civil EngineeringIndian Institute of ScienceBangaloreIndia

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