Abstract
Numerical analysis has been performed on the motion of a spherical
particle injected into high temperature thermal plasma flows in order to
disclose the mechanisms of heat transfer enhancement and to establish
reliable correlations for heat transfer between the plasma gas and the
particle. In terms of fluid dynamics occurring, the Navier-Stokes
equations were solved for Ar- H2 mixture plasma gas in a two-dimensional
system by Finite Element (FE) method.
Computational simulation was undertaken to model the correlations for
fine spherical particles in Ar 25%- H2 75% as plasma gas from 1100 to
9100 K at atmospheric pressure. Our results reveal the general consensus
of Nusselt number, followed by increasing deviations as the temperature
increases. Additionally, a comparison between our data and the
predictions of other published correlations are given.
Keywords : Thermal Spray, Nusselt number, Plasma, High
Temperature