Affiliation:
1. Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee, India
Abstract
In this work, effects of Prandtl number on the heat transfer characteristics
of an unconfined rotating circular cylinder are investigated for varying
rotation rate (? = 0 - 5) in the Reynolds number range 1 - 35 and Prandtl
numbers range 0.7 - 100 in the steady flow regime. The numerical calculations
are carried out by using a finite volume method based commercial CFD solver
FLUENT. The isotherm patterns are presented for varying values of Prandtl
number and rotation rate in the steady regime. The variation of the local and
the average Nusselt numbers with Reynolds number, Prandtl number and rotation
rate are presented for the above range of conditions. The average Nusselt
number is found to decrease with increasing value of the rotation rate for
the fixed value of the Reynolds and Prandtl numbers. With increasing value of
the Prandtl number, the average Nusselt number increases for the fixed value
of the rotation rate and the Reynolds number; however, the larger values of
the Prandtl numbers show a large reduction in the value of the average
Nusselt number with increasing rotation rate.
Publisher
National Library of Serbia
Subject
Renewable Energy, Sustainability and the Environment
Cited by
28 articles.
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