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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/1881
Title: Effect of a circular cylinder on separated forced convection at a backward-facing step
Authors: Kumar A.
Dhiman, Amit KumarK.
Published in: International Journal of Thermal Sciences
Abstract: The current study investigates the augmentation in the laminar forced convection characteristics of the backward-facing step flow in a two-dimensional channel by means of introducing an adiabatic circular cylinder in the domain. The effects of various cross-stream positions (i.e., yc = 0-1.5) of the circular cylinder on the flow and heat transfer characteristics of the backward-facing step flow has been numerically explored for the Reynolds number range 1-200 and Prandtl number of 0.71 (air). The governing continuity, Navier-Stokes and energy equations along with appropriate boundary conditions are solved by using FLUENT. The flow and thermal fields have been explained by streamline and isotherm profiles, respectively; however, no temperature dependency effects are considered for the flow viscosity and thermal conductivity. The engineering parameters like wake/recirculation length, total drag coefficient and average Nusselt number, etc. are calculated for the above range of conditions. The present results show an enhancement in the peak Nusselt value of up to 155% using a circular cylinder as compared to the unobstructed case (i.e., without cylinder). Finally, simple correlations for total drag coefficient and peak Nusselt number are obtained for the above range of conditions. © 2011 Elsevier Masson SAS. All rights reserved.
Citation: International Journal of Thermal Sciences (2012), 52(): 176-185
URI: https://doi.org/10.1016/j.ijthermalsci.2011.09.014
http://repository.iitr.ac.in/handle/123456789/1881
Issue Date: 2012
Keywords: Backward-facing step
Circular cylinder
Drag
Laminar flow
Nusselt number
ISSN: 12900729
Author Scopus IDs: 57211618035
8548369300
Author Affiliations: Kumar, A., Department of Chemical Engineering, Indian Institute of Technology, Roorkee 247667, India
Dhiman, A.K., Department of Chemical Engineering, Indian Institute of Technology, Roorkee 247667, India
Corresponding Author: Dhiman, A.K.; Department of Chemical Engineering, Indian Institute of Technology, Roorkee 247667, India; email: amitdfch@iitr.ernet.in
Appears in Collections:Journal Publications [CH]

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