Analytical Model for Convection Heat Transfer from Tube Banks

Abstract

The main objective of this study is to investigate heat transfer from tube banks in crossflow under isothermal boundary conditions. Because of the complex nature of fluid flow and heat transfer in a tube bank, the heat transfer from a tube in the first row of an in-line or staggered bank is determined first. For this purpose, a control volume is selected from the leading row of a tube bank and an integral method of boundary layer analysis is employed to determine the average heat transfer from the front stagnation point to the separation point, whereas the heat transfer from the separation point to the rear stagnation point is determined by an empirical correlation. To include the effect of the remaining rows, an empirical correlation is employed. The models for in-line and staggered arrangements are applicable for use over a wide range of Reynolds and Prandtl numbers as well as longitudinal and transverse pitch ratios.