Laminar natural convection of non-Newtonian power-law fluid in an eccentric annulus

This work is about studying the natural convection of two-dimensional steady state non-Newtonian power law fluid numerically. The inner cylinder was put eccentrically into outer one. cylinders are held at constant temperatures with one heated isothermally temperature Th and cooled Tc (Th>Tc). simulations have been taken for parameters 103?Ra?105, 10?Pr?103, 0.6?n?1.4, 0???0.9 an inclination angle ? from 0? up to 90?. average Nusselt numbers previous obtained discussed results revealed that number has highest values when n=0.6, Ra=105 ?=0 which a signal large transfer herein lowest n=1.4, Ra=103 ?=90? by conduction more than convection. Furthermore, increasing eccentricity causes increase in all cases. Finally, best case where we can get heat = 0, ?=0.9 among them all. compared some precedent works showed good agreement.