Numerical Simulation of Dust Dispersion in 5 L Vessel

Numerical simulation was used to obtain the transient concentration of dust in the process of dispersion in a closed vessel in this work. Through the transient concentration of dust obtained by numerical results, the best ignition delay time can be evaluated. For the 5 L vessel and the hemispherical injection nozzle and under the blow pressure of 0.5 MPa, the ignition delay time should be 50-100 ms. Numerical results agree with the data obtained in the experiments under the same condition. It is difficult that dust concentration in the process of dispersion reaches absolutely uniform everywhere in the closed vessel.