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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/1846
Title: Fluid flow and heat transfer around a confined semi-circular cylinder: Onset of vortex shedding and effects of Reynolds and Prandtl numbers
Authors: Kumar A.
Dhiman, Amit Kumar
Baranyi L.
Published in: International Journal of Heat and Mass Transfer
Abstract: Flow and heat transfer characteristics around a semi-circular cylinder placed in a confined channel are investigated in the unsteady regime. The two-dimensional simulations are carried out for varying values of control parameters: Reynolds number (Re) = 50-200 and Prandtl number (Pr) = 0.7, 10 and 100 at a fixed blockage ratio of 25% for Newtonian constant-property fluid. Continuity, Navier-Stokes and energy equations with appropriate boundary conditions are solved using the commercial computational fluid dynamics solver Ansys Fluent. The transition from steady to time-periodic flow occurs between Re = 69 and 70. The effect of Prandtl number on Nusselt number is pronounced; the ratio of Nusselt number values belonging to Pr = 100 and those belonging to Pr = 0.7 ranges from 6.3 to 6.5 over the Reynolds number domain investigated. Finally, the present numerical results are used to develop drag coefficient, Strouhal number and Nusselt number correlations. © 2016 Elsevier Ltd.
Citation: International Journal of Heat and Mass Transfer (2016), 102(): 417-425
URI: https://doi.org/10.1016/j.ijheatmasstransfer.2016.06.026
http://repository.iitr.ac.in/handle/123456789/1846
Issue Date: 2016
Publisher: Elsevier Ltd
Keywords: Confined flow
Critical Reynolds number
Prandtl number
Semi-circular cylinder
Strouhal number
Unsteady flow
ISSN: 179310
Author Scopus IDs: 56372610200
8548369300
7003835583
Author Affiliations: Kumar, A., Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee, 247 667, India
Dhiman, A., Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee, 247 667, India
Baranyi, L., Department of Fluid and Heat Engineering, Institute of Energy Engineering and Chemical Machinery, University of Miskolc, Miskolc-Egyetemváros, 3515, Hungary
Funding Details: The authors would like to thank two anonymous reviewers for their valuable comments on this work. The third author gratefully acknowledges the support of the TÁMOP-4.2.1.B-10/2/KONV-2010-0001 project in the framework of the New Hungarian Development Plan. The realization of this project is supported by the European Union , co-financed by the European Social Fund .
Corresponding Author: Baranyi, L.; Department of Fluid and Heat Engineering, Institute of Energy Engineering and Chemical Machinery, University of MiskolcHungary; email: arambl@uni-miskolc.hu
Appears in Collections:Journal Publications [CH]

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