Abstract
Heat transfer and fluid flow over in-line bundles of cylinders have been numerically simulated. Flow is assurned as incompressible, two-dimensional and laminar. Analysis has been carried out for Reynolds numbers of 50, 100, 150 and pitch to diameter ratios (PDR) of 1.5 and 2.0 with a Prandtl number of 0.71. The effect of Richardson number ( Ri = Gr/Re 2) on the flow and heat transfer has been investigated for Ri = −1.0, −0.5, 0.0, + 0.5 and + 1.0. Streamlines, temperature contours, average Nusselt numbers, average friction coefficients and pressure distribution around the cylinders are presented. It is observed that there is a considerable effect of buoyancy over tube bundles.
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