Numerical Coupling of the Particulate Phase to the Plasma Phase in Modeling of Multi-Arc Plasma Spraying

14th High-Tech Plasma Processes Conference

Bobzin, K.^1 ; Öte, M.^1

RWTH Aachen University, IOT-Surface Engineering Institute, Aachen, Germany^1

关键词: Heat and mass transfer;    Numerical approaches;    One-way couplings;    Particle behavior;    Particle in-flight;    Plasma-particle interaction;    Powder particles;    Two-way coupling;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/825/1/012003/pdf
DOI  :  10.1088/1742-6596/825/1/012003

来源: IOP

【 摘 要 】

Inherent to Euler-Lagrange formulation, which can be used in order to describe the particle behavior in plasma spraying, particle in-flight characteristics are determined by calculating the impulse, heat and mass transfer between the plasma jet and individual powder particles. Based on the assumption that the influence of the particulate phase on the fluid phase is insignificant, impulse, heat and mass transfer from particles to the plasma jet can be neglected using the so-called numerical approach of "one-way coupling". On the other hand, so-called "two-way coupling" considers the two-sided transfer between both phases. The former is a common simplification used in the literature to describe the plasma-particle interaction in thermal spraying. This study focuses on the significance of this simplification on the calculated results and shows that the use of this simplification leads to significant errors in calculated plasma and particle in-flight characteristics in three-cathode plasma spraying process.