Momentum and heat transfer from an asymmetrically confined circular cylinder in a plane channel

Srinivas Mettu, Nishith Verma, R. P. Chhabra

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Abstract

Unsteady momentum and heat transfer from an asymmetrically confined circular cylinder in a plane channel is numerically investigated using FLUENT for the ranges of Reynolds numbers as 10 ≤ Re ≤ 500, of the blockage ratio as 0.1 ≤ β ≤ 0.4, and of the gap ratio as 0.125 ≤ γ ≤ 1 for a constant value of the Prandtl number of 0.744. The transition of the flow from steady to unsteady (characterized by critical Re) is determined as a function of γ and β. The effect of γ on the mean drag (C D̄) and lift (CL̄) coefficients, Strouhal number (St), and Nusselt number (Nu w ) is studied. Critical Re was found to increase with decreasing γ for all values of β. C D̄ and St were found to increase with decreasing values of γ for fixed β and Re. The effect of decrease in γ on (Nu w) was found to be negligible for all blockage ratios investigated.

Original languageBritish English
Pages (from-to)1037-1048
Number of pages12
JournalHeat and Mass Transfer/Waerme- und Stoffuebertragung
Volume42
Issue number11
DOIs
StatePublished - Sep 2006

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