Numerical modelling of droplet impingement
Kamnis, S. and Gu, S. (2005) Numerical modelling of droplet impingement. Journal of Physics D: Applied Physics, 38, (19), 3664-3673. (doi:10.1088/0022-3727/38/19/015).
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Powder particles are projected from a thermal spray gun towards substrates to generate protective coatings. A clear understanding of the dynamic impingement when droplets make contact with substrates is critical for controlling and optimizing the thermal spray process. A droplet impingement model is developed to simulate the transient flow dynamics during impact, spreading and solidification. The volume of fluid surface tracking technique is employed within a fixed Eulerian structured mesh. The numerical model is validated with experimental data from tin droplet measurements. The results prove that thermal contact resistance is the key element in characterizing the substrate surface roughness for impingement modelling. It is found that spreading, solidification and air entrapment are closely related to surface roughness.
|Subjects:||T Technology > TJ Mechanical engineering and machinery
T Technology > TN Mining engineering. Metallurgy
Q Science > QA Mathematics
|Divisions:||University Structure - Pre August 2011 > School of Engineering Sciences > Thermofluids and Superconductivity
University Structure - Pre August 2011 > School of Engineering Sciences > Engineering Materials & Surface Engineering
University Structure - Pre August 2011 > School of Engineering Sciences > Computational Engineering and Design
|Date Deposited:||10 Aug 2007|
|Last Modified:||01 Jun 2011 16:55|
|RDF:||RDF+N-Triples, RDF+N3, RDF+XML, Browse.|
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