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Numerical Heat Transfer, Part A: Applications
An International Journal of Computation and Methodology
Volume 58, 2010 - Issue 5
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Original Articles

The Effect of Aiding/Opposing Buoyancy on Two-Dimensional Laminar Flow Across a Circular Cylinder

Gurunath Gandikota LPMI, Arts et Métiers Paris Tech, Angers, France
,
Sakir Amiroudine Laboratoire TREFLE UMR CNRS, Talence, FranceCorrespondence[email protected]
,
Dipankar Chatterjee Simulation & Modeling Laboratory, Central Mechanical Engineering Research Institute, (Council of Scientific & Industrial Research), Durgapur, India
&
Gautam Biswas Indian Institute of Technology Kanpur, Kanpur, India
Pages 385-402 | Received 11 Dec 2009, Accepted 26 May 2010, Published online: 09 Sep 2010
 
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Abstract

The effect of thermal buoyancy on the upward flow and heat transfer characteristics around a heated/cooled circular cylinder is studied. A two-dimensional finite-volume model is deployed for the analysis. The influence of aiding/opposing buoyancy is studied for the range of parameters −0.5 ≤ Ri ≤ 0.5, 50 ≤ Re ≤ 150, and the blockage ratios of B = 0.02 and 0.25. The flow shows unsteady periodic nature in the chosen range of Reynolds numbers for the forced convective cases (Ri = 0), and the vortex shedding stops completely at some critical values of Richardson numbers.

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