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Author Parizi, H.B. ♦ Rosenzweig, L. ♦ Mostaghimi, J. ♦ Chandra, S. ♦ Coyle, T. ♦ Salimi, H. ♦ Pershin, L. ♦ McDonald, A. ♦ Moreau, C.
Source SpringerLink
Content type Text
Publisher Springer US
File Format PDF
Copyright Year ©2007
Language English
Subject Domain (in DDC) Natural sciences & mathematics ♦ Chemistry & allied sciences
Subject Keyword droplet impact ♦ numerical simulation ♦ patterned surface ♦ solidification ♦ thermal spray coating ♦ Analytical Chemistry ♦ Operating Procedures, Materials Treatment ♦ Characterization and Evaluation of Materials ♦ Materials Science ♦ Tribology, Corrosion and Coatings ♦ Surfaces and Interfaces, Thin Films
Abstract This work presents numerical simulation results for molten nickel and zirconia (YZS) droplets impacting on different microscale-patterned surfaces of silicon. The numerical simulation clearly showed the effect of surface roughness and solidification on the shape of the final splat, as well as the pore creation beneath the sprayed material. Simulations were performed using computational fluid dynamic software, SimDrop. The code uses a three-dimensional finite-difference algorithm solving the full Navier-Stokes equation, including heat transfer and phase change. A volume of fluid (VOF) tracking algorithm is used to track the droplet-free surface. Thermal contact resistance at the droplet-substrate interface is also included in the model. Specific attention is paid to the simulation of droplet impact under plasma spraying conditions. Droplet sizes ranged from 15 to 60 microns with initial velocities of 70-250 m/s. Substrate surfaces were patterned with regular arrays of cubes 1-3 μm high, spaced either 1 μm or 5 μm from each other. Different splat morphologies produced by simulations are compared with those obtained from the experiment conducted under the same impact and surface conditions.
ISSN 10599630
Age Range 18 to 22 years ♦ above 22 year
Educational Use Research
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2007-10-13
Publisher Place Boston
e-ISSN 15441016
Journal Journal of Thermal Spray Technology
Volume Number 16
Issue Number 5-6
Page Count 9
Starting Page 713
Ending Page 721

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Source: SpringerLink