Modelling of impingement phenomena for molten metallic droplets with low to high velocities

H. Tabbara; S. Gu

doi:10.1016/j.ijheatmasstransfer.2011.12.010

Modelling of impingement phenomena for molten metallic droplets with low to high velocities

H. Tabbara, S. Gu^*

^*Corresponding author for this work

Xi'an Jiaotong-Liverpool University

Research output: Contribution to journal › Article › peer-review

42 Citations (Scopus)

Abstract

Thermal spray coatings are formed by accelerating a stream of powder particles towards a targeted substrate surface where they impact, deform, and adhere. A fundamental understanding of the splat formation can pave the way for future developments in thermal spray technology through better understanding. Numerical modelling is applied in this investigation which simulates the detailed transient flow of a molten metal droplet impacting, deforming, and solidifying on a flat, solid substrate. The computations are carried out on a fixed Eularian structured mesh using a volume of fluid method to simulate the boundary between the metallic and atmospheric-gas phases. The results shed light on the break-up phenomena on impact and describe in detail how the solidification process varies with an increasing impact velocity.

Original language	English
Pages (from-to)	2081-2086
Number of pages	6
Journal	International Journal of Heat and Mass Transfer
Volume	55
Issue number	7-8
DOIs	https://doi.org/10.1016/j.ijheatmasstransfer.2011.12.010
Publication status	Published - Mar 2012

Keywords

CFD
Droplet impact
Metal powder
Model
Spray
Thermal
VOF

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10.1016/j.ijheatmasstransfer.2011.12.010

Cite this

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title = "Modelling of impingement phenomena for molten metallic droplets with low to high velocities",

abstract = "Thermal spray coatings are formed by accelerating a stream of powder particles towards a targeted substrate surface where they impact, deform, and adhere. A fundamental understanding of the splat formation can pave the way for future developments in thermal spray technology through better understanding. Numerical modelling is applied in this investigation which simulates the detailed transient flow of a molten metal droplet impacting, deforming, and solidifying on a flat, solid substrate. The computations are carried out on a fixed Eularian structured mesh using a volume of fluid method to simulate the boundary between the metallic and atmospheric-gas phases. The results shed light on the break-up phenomena on impact and describe in detail how the solidification process varies with an increasing impact velocity.",

keywords = "CFD, Droplet impact, Metal powder, Model, Spray, Thermal, VOF",

author = "H. Tabbara and S. Gu",

note = "Funding Information: The authors gratefully acknowledge the financial support from EU FP7 SIMUSPRAY Project (Grant No. 230715 ), FP7 ECOFUEL Project (Grant No. 246772 ), the UK Engineering and Physical Sciences Research Council (EPSRC) grant ( EP/G034281/1 ) and PowderMatrix.",

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journal = "International Journal of Heat and Mass Transfer",

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AU - Tabbara, H.

AU - Gu, S.

N1 - Funding Information: The authors gratefully acknowledge the financial support from EU FP7 SIMUSPRAY Project (Grant No. 230715 ), FP7 ECOFUEL Project (Grant No. 246772 ), the UK Engineering and Physical Sciences Research Council (EPSRC) grant ( EP/G034281/1 ) and PowderMatrix.

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N2 - Thermal spray coatings are formed by accelerating a stream of powder particles towards a targeted substrate surface where they impact, deform, and adhere. A fundamental understanding of the splat formation can pave the way for future developments in thermal spray technology through better understanding. Numerical modelling is applied in this investigation which simulates the detailed transient flow of a molten metal droplet impacting, deforming, and solidifying on a flat, solid substrate. The computations are carried out on a fixed Eularian structured mesh using a volume of fluid method to simulate the boundary between the metallic and atmospheric-gas phases. The results shed light on the break-up phenomena on impact and describe in detail how the solidification process varies with an increasing impact velocity.

AB - Thermal spray coatings are formed by accelerating a stream of powder particles towards a targeted substrate surface where they impact, deform, and adhere. A fundamental understanding of the splat formation can pave the way for future developments in thermal spray technology through better understanding. Numerical modelling is applied in this investigation which simulates the detailed transient flow of a molten metal droplet impacting, deforming, and solidifying on a flat, solid substrate. The computations are carried out on a fixed Eularian structured mesh using a volume of fluid method to simulate the boundary between the metallic and atmospheric-gas phases. The results shed light on the break-up phenomena on impact and describe in detail how the solidification process varies with an increasing impact velocity.

KW - CFD

KW - Droplet impact

KW - Metal powder

KW - Model

KW - Spray

KW - Thermal

KW - VOF

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DO - 10.1016/j.ijheatmasstransfer.2011.12.010

M3 - Article

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SN - 0017-9310

VL - 55

SP - 2081

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JO - International Journal of Heat and Mass Transfer

JF - International Journal of Heat and Mass Transfer

IS - 7-8

ER -

Modelling of impingement phenomena for molten metallic droplets with low to high velocities

Abstract

Keywords

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