Experimental and numerical simulation study on the dispersion and explosion process of solid-liquid-air mixed three phase components

The diffusion of solid-liquid fuel and the explosion of three-phase mixed cloud were studied experimentally in an unconstrained external field. The formation and explosion process of solid-liquid fuel clouds was implemented using numerical simulation methods, and param such as cloud diameter, cavity diameter, cloud concentration, fireball temperature, and overpressure distribution were obtained. The results show that the cloud cluster expands rapidly in the early stage of fuel dispersal, and gradually enters the turbulent diffusion stage after 20 ms. At 40 ms, the diameter of the cloud cluster is about 4.97 m, the volume of the cloud cluster is 18.31 m3, and the fuel concentration is mainly in the range of 30 g m−3–80 g m−3. The error between the scattering and explosion processes of numerical simulation and experimental results is less than 10 %, proving the reliability of the simulation model. This study can guide the prevention of industrial disasters.