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Numerical study of molten and semi-molten ceramic impingement by using coupled Eulerian and Lagrangian method

Zhu, Z, Kamnis, S and Gu, S (2015) Numerical study of molten and semi-molten ceramic impingement by using coupled Eulerian and Lagrangian method Acta Materialia, 90 (15 May). pp. 77-87. (Submitted)

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Abstract

Large temperature gradients are present within ceramic powder particles during plasma spray deposition due to their low thermal conductivity. The particles often impinge at the substrate in a semi-molten form which in turn substantially affects the final characteristics of the coating being formed. This study is dedicated to a novel modeling approach of a coupled Eulerian and Lagrangian (CEL) method for both fully molten and semi-molten droplet impingement processes. The simulation provides an insight to the deformation mechanism of the solid core YSZ and illustrates the freezing-induced break-up and spreading at the splat periphery. A 30 μm fully molten YSZ particle and an 80 μm semi-molten YSZ particle with different core sizes and initial velocity ranging from 100 to 240 m/s were examined. The flattened degree for both cases were obtained and compared with experimental and analytical data.

Item Type: Article
Authors :
NameEmailORCID
Zhu, ZUNSPECIFIEDUNSPECIFIED
Kamnis, SUNSPECIFIEDUNSPECIFIED
Gu, SUNSPECIFIEDUNSPECIFIED
Date : 6 March 2015
Funders : UK Engineering and Physical Sciences Research Council (EPSRC), FP7 Marie Curie
Identification Number : 10.1016/j.actamat.2015.02.010
Copyright Disclaimer : Copyright © 2016 Elsevier B.V. or its licensors or contributors.
Uncontrolled Keywords : Thermal spray, Semi-molten particles, Coupled Eulerian and Lagrangian method, Flattening degree
Depositing User : Symplectic Elements
Date Deposited : 28 Mar 2017 10:59
Last Modified : 31 Oct 2017 18:14
URI: http://epubs.surrey.ac.uk/id/eprint/810550

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