Paper Title
Investigation of Tio2-Water Nanofluid Behavior Through a Wavy Corrugated Pipe in Terms of Heat Transfer and Pumping Power

Abstract
In sustainable energy, implementation of nanofluid as a working fluid is a novel method in many engineering and industrial applications. Nanofluid provides superior thermo-physical properties in terms of higher thermal conductivity for outstanding thermal performance of the working fluid. In the present article, numerical investigation of heat transfer and pumping power are performed for TiO2-water nanofluid through wavy corrugated pipe subjected to constant heat flux. The study is carried out for a wide range of Reynolds number 15,000-40,000 and nanoparticles volume concentration 1% to 5%. Finite volume method is applied in order to solve continuity, momentum and energy equations and realizable k-ε model with enhanced wall treatment is chosen for single phase analysis. By the addition of nanoparticles within a preferred volume fraction in base fluid water results higher heat transfer rate and reduced pumping power. Finally the optimum volume fraction of the nanofluid is determined up to which the requirement of pumping power per unit length is lower compared to base fluid. Index Termsó Heat Transfer, Nanofluid, Pumping Power, Wavy Wall.