Laminar Flow for a Newtonian Thermodependent Fluid in an Eccentric Horizontal Annulus

This work focused on the numerical study of forced convection, for a thermodependent Newtonian fluid in an eccentric horizontal annular duct. The inner and outer cylinders were heated with constant heat flux. The governing equations were solved numerically by a finite difference method with implicit scheme. The dynamic profile was assumed to be fully developed while the temperature profile was assumed uniform at the entrance. The aim of this work was to present the effects of eccentricity on the dynamic and thermal fields along the duct. The thermodependency effect of the fluid was also examined, and some interesting results regarding the reduction of the dynamic blocking phenomenon of the flow in the narrow part of the duct for large eccentricities were presented. These results reduce the strictness of precautions for neglecting axial diffusion when making computations in such geometries.