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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/1845
Title: Flow and Heat Transfer Phenomena around an Equilateral Triangular Bluff Body: Effect of Wall Confinement
Authors: Dhiman, Amit KumarK.
Published in: Heat Transfer - Asian Research
Abstract: This paper focuses on the effects of wall confinements (or blockage ratios) on the flow and heat transfer characteristics around a long equilateral triangular bluff body placed in a horizontal channel for Reynolds number (Re) range 1 to 80 and blockage ratio range 0.1 to 0.5 for air as the working fluid. The governing continuity, Navier–Stokes and energy equations along with appropriate boundary conditions are solved by using a finite volume method-based commercial solver Ansys Fluent. The total drag coefficient decreases with an increasing value of Re for a fixed value of the blockage ratio; however, it increases with an increasing value of the blockage ratio for a fixed value of Re due to the fact that the channel walls exert an extra retardation force on the obstacle. The onset of flow separation is delayed as the value of the blockage ratio increases. The critical Re (i.e., the transition to a time-periodic regime) exists between 45 and 46, 46 and 47, 58 and 59, and 79 and 80 for the blockage ratios of 0.1, 0.125, 0.25, and 0.5, respectively. The simple correlations for wake length, total drag coefficient, and average obstacle Nusselt number are obtained for the range of conditions covered. © 2015 Wiley Periodicals, Inc.
Citation: Heat Transfer - Asian Research (2016), 45(7): 608-630
URI: https://doi.org/10.1002/htj.21179
http://repository.iitr.ac.in/handle/123456789/1845
Issue Date: 2016
Publisher: John Wiley and Sons Inc.
Keywords: blockage ratio
drag
Nusselt number
recirculation length
Strouhal number
triangular bluff body
ISSN: 10992871
Author Scopus IDs: 8548369300
Author Affiliations: Dhiman, A.K., Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee 247 667, India
Corresponding Author: Dhiman, A.K.; Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee 247 667, India
Appears in Collections:Journal Publications [CH]

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