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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/1871
Title: Flow and heat transfer over a trapezoidal cylinder: Steady and unsteady regimes
Authors: Dhiman, Amit Kumar
Hasan M.
Published in: Asia-Pacific Journal of Chemical Engineering
Abstract: Two-dimensional unconfined flow and heat transfer across a long tapered trapezoidal bluff body are investigated for the range Re = 1 to 150 (thereby covering both steady and unsteady periodic regimes) and Pr = 0.7 (air). A number of engineering parameters, e.g. drag and lift coefficients, Strouhal and Nusselt numbers, and others, is calculated for the above range of conditions. No flow separation occurs from the surface of the trapezoidal cylinder for the range Re ? 5; however, flow starts to separate from the rear surface of the cylinder at Re = 6. Therefore, the onset of flow separation exits between Re = 5 and 6. The critical value of the Reynolds number (i.e. transition from steady to unsteady) exists between Re = 46 and 47. The drag coefficient decreases with increasing Reynolds number in the steady regime; however, the drag increases with Reynolds number in the unsteady regime. The Strouhal number and the average Nusselt number increase with increasing value of the Reynolds number. Finally, the simple correlation for the average Nusselt number is obtained in the steady flow regime. © 2012 Curtin University of Technology and John Wiley & Sons, Ltd.
Citation: Asia-Pacific Journal of Chemical Engineering (2013), 8(3): 433-446
URI: https://doi.org/10.1002/apj.1678
http://repository.iitr.ac.in/handle/123456789/1871
Issue Date: 2013
Keywords: critical Reynolds number
drag
Nusselt number
Strouhal number
trapezoidal cylinder
wake length
ISSN: 19322135
Author Scopus IDs: 8548369300
43861142300
Author Affiliations: Dhiman, A., Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee, 247 667, India
Hasan, M., Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee, 247 667, India
Corresponding Author: Dhiman, A.; Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee, 247 667, India; email: dhimuamit@rediffmail.com
Appears in Collections:Journal Publications [CH]

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