Abstract
In the present work, laminar cross flow forced convective heat transfer of nano fluid over tube banks with Circular geometry under constant wall temperature condition is investigated numerically. In this study nanofluid instead of pure fluid, as external cross flow, because of its potential to increase heat transfer rate of the system. The effect of the nanofluid on the compact heat exchanger performance was studied and compared to that of a conventional fluid. The two dimensional steady state Navier-Stokes equations and the energy equation governing laminar incompressible flow are solved using a finite volume method for the case of flow across an in-line bundle of tube banks as commercial compact heat exchanger. The nanofluid used was copper water 1% and the performance was compared with water. In this paper, the effect of parameters such as tube shape circular and heat transfer comparison between nanofluid and pure fluid is studied. Temperature profile, heat transfer coefficient and