Convective heat transfer from a heated elliptic cylinder atuduniform wall temperature

摘要

This study is carried out to analyse the convective heat transfer from a circular and an elliptic cylinders toudair. Both circular and elliptic cylinders have the same cross section. The aspect ratio of cylinders range 0ud≤ ε ≤ 1 are studied. The implicit scheme of the finite difference is applied to obtain the discretizedudequations of hydrodynamic and thermal problem. The Choleski method is used to solve the discretizedudhydrodynamic equation and the iteration method is applied to solve the discretized thermal equation. Theudcircular cylinder has the aspect ratio equal to unity while the elliptical cylinder has the aspect ratio lessudthan unity by reducing the minor axis and increasing the major axis to obtain the same cross section asudcircular cylinder. The results of the calculations show that the skin friction change significantly, but inudcontrast with the elliptical cylinders have greater convection heat transfer than that of circular cylinder.udSome results of calculations are compared to the analytical solutions given by the previous authors.