MIXED CONVECTION HEAT TRANSFER PAST IN-LINE CYLINDERS IN A VERTICAL DUCT

Abstract

Heat transfer and fluid flow over a row of in-line cylinders placed between two parallel plates are studied numerically. Solutions of governing equations have been obtained using Euler's explicit algorithm. Numerical results have been obtained for duct watt spacings S/D =1.5, 2.0, and 2.5; Re = 50 and 100; and Pr = 0.7. The effect of Richardson number on die flow and heat transfer has been investigated in the range of Ri = −5.0 to +5.0. Streamlines, temperature contours, local and average Nusselt numbers, pressure, and shear stress distribution around the cylinders are presented. There are considerable effects of buoyancy and the blockage on flow and heat transfer over, the cylinders.

Notes

Address correspondence to Dr. K. N. Seetharamu, Department of Mechanical Engineering, Heat Transfer and Power Laboratory, Indian Institute of Technology, Madras 600 036, India. E-mail: [email protected]