The micro-tube heat transfer and fluid flow of water based Al2O3 nanofluid with viscous dissipation

The numerical modeling of the conjugate heat transfer and fluid flow of Al2O3/water nanofluid through the micro-tube was presented in the paper. The laminar flow regime was considered along with viscous dissipation effect. The diameter ratio of the micro-tube was D-i/D-o=0.1/0.3 mm with a tube length L=100 mm. The heat transfer rate was fixed to Q=0.5 W with three different Br=0.1, 0.5 and 1. The water based Al2O3 nanofluid was considered with various volume concentrations of Al2O3 particles phi=1, 4, 6, 9% and two diameters of the particles D-p=10 nm and 47 nm. The analysis was performed on the results for local heat transfer coefficient. (C) 2011 Elsevier Ltd. All rights reserved.