Abstract:
The purpose of this work is to numerically study the heat transfer by natural convection in a vertical
annular geometry. These configurations are of a capital interest in the field of industrial applications or
systems producing nuclear or chemical energy. In this regard, the work of this thesis consists of a study of
free convection and combination of a two-dimensional incompressible thermal flow of air in a vertical
annular tapered cavity. The equations of continuity, momentum and energy were solved by the finite
volume method using FLUENT commercial code. In addition, the numerical results in terms of Nusselt
number were compared with those of the literature. The results for the dynamic and thermal field flow
were presented and discussed for different Rayleigh numbers and Reynolds. The geometry influence (the
aspect ratio and height ratio) was taken into account.
