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Influence of the slope angle on the transient natural convection of a newtonian fluid delimited by portions of cylinders

Effects of the inclination angle ? on a two dimensional natural convection in an enclosure delimited by portions of cylinders has been analyzed numerically. The Rayleigh number and the angle of inclination are used as control parameters for flow and heat transfer. ? was varied from 0 to ?, for a range of Rayleigh number from 105 to 107. The governing equations are solved with finite difference method with a purely implicit scheme for time discretization. The algebraic systems of equations are solved by a Successive Under Relaxation (SUR) method. The results showed that if the transition from a pseudo-conductive regime to a convective one is slightly affected by ?, the thermal and dynamical fields are very different according to whether ? is superior or equal to ?/2.

Auteur(s) : Omar Ngor Thiam, Samba Dia, Joseph Sarr
Année de publication : 2014
Revue : ?International Review of Mechanical Engineering
Type : Article
Mise en ligne par : DIA Samba