analytical modeling of a counterflow diffusion flame of a dust cloud

diffusion flame in a dust cloud combustion in a counterflow configuration is investigated in this research. it is presumed that the fuel particles vaporize first to yield a gaseous fuel to oxidize with the gas phase. the reaction rate is assumed to be of the arrhenius type. conservation equations for the non-unity lewis number are solved and the flame temperature with the variations of different lewis numbers of fuel and oxidizer is proposed. furthermore, the variations of flame position with the variation of lewis number are evaluated. it has been found that the flame temperature decreases with increasing of fuel and oxidizer lewis numbers, which for rise of fuel lewis number from 0.1 to1.4, the flame temperature decreases from 1943 to 1473k.