Numerical Analysis Of Natural Convection In Shed Roofs With Eave Of Buildings For Cold Climates

摘要

A numerical study has been carried out on partially heated triangular enclosures with eave. The eave and inclined wall has a cold temperature. The laminar, two-dimensional, steady governing equations of natural convection are solved in the streamfunction-vorticity form using a finite difference technique. Streamline, isotherm and Nusselt number are presented for different parameters such as aspect ratio AR = H/L from 0.25 to 1, ratio of eave length E = L where n changes from 3 to 7 and Rayleigh number from 10~3 to 10~6. It is observed that the heat transfer decreases with increasing aspect ratio for small Rayleigh number but increases for higher Rayleigh number. Heat transfer also increases with decreasing eave length.