Spherical combustion clouds in explosions

Spherical Combustion Clouds in Explosions (Rev 5a)

This study investigates combustion clouds embedded in unconfined spherical explosions. Two charge configurations are considered: a 0.5-g spherical PETN booster surrounded by a spherical shell of either 1-g of TNT solid or of 1-g of Aluminum (Al) powder; these provide the fuel for the combustion process. Detonation of booster disperses the fuel, whose expansion drives a blast wave into the surro...

Combustion Effects in Confined Explosions

Effect of Radiation Heat Loss and Ventilation on Dust Explosions in Spherical Vessels

The flame propagation through a coal dust-air mixture in a spherical vessel was studied by means of a one-dimensional, Arrhenius-type kinetics and quasi-steady model. The model includes the evaporation of the volatile matter of dust particles into a known gaseous fuel (methane) and the single-stage reaction of the gas-phase combustion. Effect of venting devices as safety idea and the radiation ...

Spherical billboards and their application to rendering explosions

This paper proposes an improved billboard rendering method that splats particles as aligned quadrilaterals similarly to previous techniques, but takes into account the spherical geometry of the particles during fragment processing. The new method can eliminate billboard clipping and popping artifacts of previous techniques, happening when the participating medium contains objects, or the camera...

Gravitational Collapse of Spherical Interstellar Clouds

In this paper, the gravitational collapse of spherical interstellar clouds is discussed based on hydrodynamical simulations. The evolution is divided into two phases: former runaway collapse phase, in which the central density increases greatly on a nite time scale, and later contraction, associated with accretion onto a newborn star. The initial density distribution is expressed using a ratio ...