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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/1878
Title: Wall effects on the cross-buoyancy around a square cylinder in the steady regime
Authors: Dhiman A.K.
Sharma N.
Kumar S.
Published in: Brazilian Journal of Chemical Engineering
Abstract: The effects of blockage ratio on the combined free and forced convection from a long heated square obstacle confined in a horizontal channel are investigated in this work. The numerical computations are performed in the steady regime for Reynolds number = 1 - 30, Richardson number = 0 - 1 for blockage ratios of 0.125 and 0.25 for the fixed Prandtl number of 0.7 (air). The governing equations, along with appropriate boundary conditions, are solved by using a semi-explicit finite volume method implemented on the collocated grid arrangement. The total drag and lift coefficients, local and average Nusselt numbers and the representative streamline, vorticity and isotherm patterns are presented to elucidate the role of blockage ratio on the cross-buoyancy across a confined square cylinder. The asymmetry in the flow and temperature fields decreases with increasing value of the blockage ratio. Similar to forced convection, the total drag coefficient increases with increasing value of the blockage ratio for the fixed values of the Reynolds and Richardson numbers.
Citation: Brazilian Journal of Chemical Engineering (2012), 29(2): 253-264
URI: https://doi.org/10.1590/S0104-66322012000200006
http://repository.iitr.ac.in/handle/123456789/1878
Issue Date: 2012
Keywords: Blockage ratio
Cross-buoyancy
Drag
Lift
Nusselt number
Square obstacle
ISSN: 1046632
Author Scopus IDs: 8548369300
57192806754
21743099500
Author Affiliations: Dhiman, A.K., Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee, 247 667, India
Sharma, N., Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee, 247 667, India
Kumar, S., 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; email: dhimuamit@rediffmail.com
Appears in Collections:Journal Publications [CH]

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