Title: A lattice Boltzmann-based investigation of powder in-flight characteristics during APS process, part I: modelling and validation

Authors: Ridha Djebali; Mohamed El Ganaoui; Bernard Pateyron

Addresses: Université de Tunis El Manar, Faculté des Sciences de Tunis/LETTM, 2092 Manar II, Tunis, Tunisie. ' Université de Lorraine, IUT Henri Poincaré/LERMAB-Longwy, 186-Rue de Lorraine, 54400 Cosnes et Romain, France. ' CNRS-SPCTS/CEC, 12 Rue Atlantis, 87068, Limoges, France

Abstract: This study aims to investigate turbulent plasma flow over spheroidal particles using the lattice Boltzmann (LB) method. A double population model D2Q9-D2Q4 is employed to calculate the plasma velocity and temperature fields. Along with the calculation process a conversion procedure is made between the LB and the physical unit systems, so that thermo-physical properties variation is fully accounted for and the convergence is checked in physical space. The configuration domain and the boundary condition treatment are selected based on the most cited studies in order to illustrate a realistic situation. The jet morphology analysis gives credible results by comparison with commonly published works. A second Lagrangian model has been developed to investigate the plasma-particles exchange during its in-flight. The tracking of the µ-sized particles allows concluding that our results are in sufficient agreement with those of the Jets&Poudres code and that the LB method account well for plasma jet physics which affects directly the particles in-flights.

Keywords: computational lattice Boltzmann model; axisymetric formulation; atmospheric plasma spraying; APS process; powder dynamics; heating; modelling; validation; turbulent plasma flow; spheroidal particles; jet morphology; plasma jet physics; in-flight particles.

DOI: 10.1504/PCFD.2012.048250

Progress in Computational Fluid Dynamics, An International Journal, 2012 Vol.12 No.4, pp.270 - 278

Published online: 30 Jul 2012 *

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