Eur. Phys. J. Appl. Phys. (2017) 78: 34815
https://doi.org/10.1051/epjap/2017160492

Regular Article

Numerical investigation of heat and momentum transfer to particles in high temperature thermal spraying^*

¹ Laboratoire de Physique Quantique de la Matière et Modélisation Mathématique (LPQ3M), Université Mustapha Stambouli, PO Box 305, Route de Mamounia, 29000 Mascara, Algeria
² Lorraine University, Energetic Laboratory of Longwy (FJV/LERMAB), Henri Poincaré Institute of Longwy, 186 rue de Lorraine, 54400 Cosnes-et-Romain, France

^a e-mail: aissa86@gmail.com

Received: 28 December 2016
Revised: 1 March 2017
Accepted: 1 March 2017
Published online: 12 May 2017

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 method (FEM). 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.