Variability of Energy Dissipation and Shear Rate with Geometry in Unbaffled Surface Aerator

*Bimlesh Kumar  -  Civil Engineering, Indian Institute of Technology Guwahati, Guwahati 781039, India
Published: 10 Dec 2009.
Open Access
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Abstract

mixing in surface aerators. At constant dynamic variables (rotational speed), both  and γ are greatly affected by the geometric parameters (impeller diameter, cross-sectional area of the tank, liquid height, rotor blade length and immersion height). By doing numerical computation by VISIMIX ®, present work analyzes the effect of non-dimensional (which is non-dimensionalized through rotor diameter) geometric parameters on e and g. With an increase in liquid height, there is an increase in the case of energy dissipation and shear rate values. In the case of tank area and blade length, it is vice versa. Energy dissipation and shear rate are not affected by the variation in immersion height of the impeller. © 2009 BCREC UNDIP. All rights reserved

[Received: 17 October 2009, Revised: 12 December 2009, Accepted: 20 December 2009]

[How to Cite: B. Kumar. (2009). Variability of Energy Dissipation and Shear Rate with Geometry in Unbaffled Surface Aerator. Bulletin of Chemical Reaction Engineering and Catalysis, 4(2): 55-60. doi:10.9767/bcrec.4.2.7110.55-60]

[How to Link/ DOI: http://dx.doi.org/10.9767/bcrec.4.2.7110.55-60 || or local: http://ejournal.undip.ac.id/index.php/bcrec/article/view/7110 ]

Keywords: Energy dissipation; mixing; shear rate; surface aerator

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