Investigation on the droplet combustion in rotatory natural convection

Thermal and fluid flow analysis of hydrocarbon liquid droplet evaporation and combustion, in natural convection and in rotation are studied numerically and experimentally. The regression of the liquid droplet square diameter, the evolution of the surface temperature, the temperature variation in liquid and vapor phases, the velocity variation in vapor phase, and the flame radius and temperature evolutions in rotatory natural convection, are determined numerically by using the implicit finite difference scheme and Thomas algorithm. Comparison between numerical and experimental results shows qualitative and quantitative satisfactory agreement. Correlation expressing the combustion rate in function of Dgheim, Prandtl, and Grashof numbers is proposed. The combustion rate is the sum of the initial rate without convection, the combustion rate due to stagnant natural convection and the combustion rate due to rotatory natural convection. (C) 2018 Production and hosting by Elsevier B.V. on behalf of King Saud University.