NUMERICAL ANALYSIS OF NATURAL CONVECTION AND INFLUENCE OF THE COLLECTOR RADIUS ON THE VELOCITY AND TEMPERATURE FIELDS IN A SOLAR TOWER WITHOUT TURBINE
In this paper, we present a numerical analysis of natural convection and the effects of collector radius variation on the velocity and temperature field. After transforming the conservation equations of mass, momentum and energy, we compare the results of our calculation code with those of Comsol. On the one hand, the comparative study of the temperatures in the collector reveals a slight difference at the entrance to the chimney, on the other hand we note that there is a perfect agreement with the general appearance of the evolution curves temperatures in the chimney.