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Civil-Comp Conferences
ISSN 2753-3239
ISSN 2753-3239
CCC: 2
PROCEEDINGS OF THE ELEVENTH INTERNATIONAL CONFERENCE ON ENGINEERING COMPUTATIONAL TECHNOLOGY
PROCEEDINGS OF THE ELEVENTH INTERNATIONAL CONFERENCE ON ENGINEERING COMPUTATIONAL TECHNOLOGY
Edited by: B.H.V. Topping and P. Iványi
Paper 2.6
Modeling YSZ droplet impact with solidification microstructure formation under a horizontal electric field in plasma spraying
M.G. Shen1 and B.Q. Li2
1School of Mathematics and Statistics, Yancheng Teachers
University, Yancheng, PR China
2Department of Mechanical Engineering, University of
Michigan, Dearborn, USA
Full Bibliographic Reference for this paper
M.G. Shen, B.Q. Li, "Modeling YSZ droplet impact with solidification
microstructure formation under a horizontal
electric field in plasma spraying", in B.H.V. Topping, P. Iványi, (Editors), "Proceedings of the Eleventh International Conference on Engineering Computational Technology", Civil-Comp Press, Edinburgh, UK,
Online volume: CCC 2, Paper 2.6, 2022, doi:10.4203/ccc.2.2.6
Keywords: phase field method, polycrystal growth, Cahn-Hilliard equation,
multiphase flow.
Abstract
Current numerical models simplify the solidification microstructure formation
process in plasma spraying conditions, and deal little with droplet shape control while
undergoing solidification microstructure formation via external forces. The paper may
shed light on how to control splat shape and crystal growth in plasma spraying by
developing a novel model. Centered on the Cahn-Hilliard equation, the current
numerical model employs the coupled Navier-Stokes equations to track the liquid-gas
interface, and by virtue of an embedded phase field model combined with the heat
balance equation, captures grain-grain boundary and solid-liquid interface. The
electric force is added as a source term in the Navier-Stokes equations and the fluids
are assumed perfect dielectrics. Explicit finite difference solutions are sought with the
aid of parallel computing. The major findings are that the electric force exerts little
effect on microstructure formation but changes dramatically drop shape and hence
solidification time. Besides, the recoiling could be prevented completely, resulting in
a pancake like splat of reduced thickness.
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