## 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 _{D}̄) and lift (C_{L}̄) 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 _{D}̄ 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 language | British English |
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Pages (from-to) | 1037-1048 |

Number of pages | 12 |

Journal | Heat and Mass Transfer/Waerme- und Stoffuebertragung |

Volume | 42 |

Issue number | 11 |

DOIs | |

State | Published - Sep 2006 |