UNSTEADY LAMINAR FLOW AND HEAT TRANSFER ACROSS A CIRCULAR CYLINDER CONFINED IN A CHANNEL

摘要

In this work, the two-dimensional unsteady flow and heat transfer across a long circular cylinder confined in a channel is investigated numerically by solving the continuity, x - and y - momentum and energy equations using FLUENT. The computational grid structure is generated by using Gambit. The numerical calculations are carried out for the following range of conditions: Reynolds number, Re = 100, 150 and Prandtl number = 0.7 for a fixed blockage ratio of 0.25. The global characteristics such as total drag and lift coefficients, Strouhal number, Nusselt number and derived variable such as stream function have been calculated for the above range of conditions. For the range of conditions, the time-averaged drag coefficient decreases with increasing value of the Reynolds number.