Computational fluid dynamics study on effect of pulse injection on zinc oxide synthesis by thermal oxidation

Abstract

In this work, The effect of pulse injection on zinc oxide synthesis by thermal oxidation using Computational Fluid Dynamics (CFD) were studied. The yields of zinc oxide for different pulse injection positions were simulated using FLUENT® software. The simulation results were validated by comparing with published experimental data. The effect of pulse injection, including pulse injection position, pulse characteristic, and air feed position on yields of zinc oxide were predicted. The simulated results showed that the maximum yield of zinc oxide occurred at the pulse injection position which maximum entrainment velocity were observed. The maximum yield of zinc oxide occurred at this position because of the maximum entrainment velocity due to air jet and the turbulent mixing due to nitrogen pulse injection. The yields of continuous injection were greater than pulse injection because the turbulent kinetic energy at injection position and injection period of continuous injection were higher than pulse injection. The simulated results of air feed position effect revealed that the yields of zinc oxide for co-current were slightly greater than cross current.