Heat Transfer Enhancement Using Hybrid Nano Fluid Flow Through A Heated Circular Cylinder

Abstract

The hybrid nanofluid is a new class of heat transfer enhancement by adding two solid nanoparticles and dispersed in liquid. The determination of heat transfer coefficient ZnO and SiO2 solid nanoparticles gathering suspended in water through a heated circular cylinder is performed numerically and experimentally. The numerical study is including the physical geometry, meshing and analysis. The boundary conditions are assumed the constant heat flux (  = 6000 W/m²), Reynolds number range between 4000 to 12000 with uniform axial velocity u_o and initial temperature. The experimental study is contained setup the test rig and preparation of the hybrid nanofluid with volume fraction of 0.5 and 1% dispersed in water. Results indicate that Nusselt number is increasing as Reynolds number and volume fraction increase. It was observed that the heat transfer is enhanced by 19% when using 1% volume fraction of hybrid nanofluid.