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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/1859
Title: Laminar momentum and heat transfer in a channel with a built-in tapered trapezoidal bluff body
Authors: Dhiman A.
Verma S.
Ghosh R.
Published in: Heat Transfer - Asian Research
Abstract: Effects of wall confinements on the laminar flow and heat transfer around a heated tapered trapezoidal bluff body are investigated numerically in the confined domain (Reynolds number, Re = 1 to 40; blockage ratio = 0.125 to 0.5; and Prandtl number, Pr = 0.71). The onset of flow separation is found between Re = 4 and 5 for the blockage ratio of 0.125 and between Re = 5 and 6 for the blockage ratios of 0.25 and 0.5. If compared with a long circular obstacle on the basis of equal projected area, the total drag coefficient of the trapezoidal cylinder is found to be larger than the circular one, but an opposite trend is observed for the heat transfer. The augmentation in heat transfer for trapezoidal and circular cylinders is found to be approximately 46, 72, 74, and 65 percent for Re = 1, 5, 10, and 40, respectively for the blockage ratio of 0.25. The maximum enhancement in heat transfer for a tapered trapezoidal bluff body with respect to a square bluff body is found to be approximately 104 percent and 101 percent for blockage ratios of 0.25 and 0.5, respectively. Finally, simple correlations of wake length, drag, and average cylinder Nusselt number are established. © 2015 Wiley Periodicals, Inc.
Citation: Heat Transfer - Asian Research (2015), 44(4): 324-346
URI: https://doi.org/10.1002/htj.21124
http://repository.iitr.ac.in/handle/123456789/1859
Issue Date: 2015
Publisher: John Wiley and Sons Inc.
Keywords: Blockage ratio
Drag
Nusselt number
Pressure coefficient
Reynolds number
Trapezoidal bluff body
Wake length
ISSN: 10992871
Author Scopus IDs: 8548369300
57213739528
57212594528
Author Affiliations: Dhiman, A., Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee, 247 667, India
Verma, S., Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee, 247 667, India
Ghosh, R., Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee, 247 667, India
Appears in Collections:Journal Publications [CH]

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