Abstract
In a recent paper, Nemchinsky presents an analysis of the ‘rocket’ effect on the particle dynamics under conditions of thermal plasma spraying and claims that this effect is quite substantial with iron particles evaporating in an argon plasma flow as the calculation example. The same problem is re-examined in this communication by considering the intense evaporation of particles as a combined heat and mass transfer process and treating the ‘rocket’ force as a part of the total drag force acting on the evaporating particle. It is shown that the ‘rocket’ force caused by the non-uniform distribution of the evaporated-mass efflux from the evaporating particle makes up only a small percentage of the total drag force and thus is not important in determining the particle dynamics for the studied case.
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