A numerical method is proposed in this paper which is capable of modeling the impact and deposition of semi-molten particles. By attributing a high viscosity to the solid region, simulating the motion of solid cores including solidification/melting is made possible inside the particle. The Navier-Stokes equations are solved in combination with the Volume-of-Fluid (VOF) technique to track the free surface of the particles. In addition, the heat transfer including phase change is modeled using the enthalpy method. The viscous terms are treated implicitly to relax the restrictions associated with small computational time-steps in explicit formulations. Several case studies with operating conditions of a typical thermal spray process are simulated. These cases include the impact of molten and semi-molten nickel particles in an atmospheric plasma spray process (APS). The effects of various parameters such as particle solid-core diameter, initial velocity and temperature are investigated. The simulations show that the size of the solid core has an important effect on the amount of particle splashing during the impact.
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ASME 2012 Heat Transfer Summer Conference collocated with the ASME 2012 Fluids Engineering Division Summer Meeting and the ASME 2012 10th International Conference on Nanochannels, Microchannels, and Minichannels
July 8–12, 2012
Rio Grande, Puerto Rico, USA
Conference Sponsors:
- Heat Transfer Division
ISBN:
978-0-7918-4478-6
PROCEEDINGS PAPER
Simulation of Fluid Flow and Heat Transfer Including Phase Change During the Impact of Semi-Molten Particles
S. Alavi,
S. Alavi
Ferdowsi University of Mashhad, Mashhad, Razavi Khorasan, Iran
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M. Passandideh-Fard,
M. Passandideh-Fard
Ferdowsi University of Mashhad, Mashhad, Razavi Khorasan, Iran
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J. Mostaghimi
J. Mostaghimi
University of Toronto, Toronto, ON, Canada
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S. Alavi
Ferdowsi University of Mashhad, Mashhad, Razavi Khorasan, Iran
M. Passandideh-Fard
Ferdowsi University of Mashhad, Mashhad, Razavi Khorasan, Iran
J. Mostaghimi
University of Toronto, Toronto, ON, Canada
Paper No:
HT2012-58252, pp. 417-427; 11 pages
Published Online:
July 24, 2013
Citation
Alavi, S, Passandideh-Fard, M, & Mostaghimi, J. "Simulation of Fluid Flow and Heat Transfer Including Phase Change During the Impact of Semi-Molten Particles." Proceedings of the ASME 2012 Heat Transfer Summer Conference collocated with the ASME 2012 Fluids Engineering Division Summer Meeting and the ASME 2012 10th International Conference on Nanochannels, Microchannels, and Minichannels. Volume 2: Heat Transfer Enhancement for Practical Applications; Fire and Combustion; Multi-Phase Systems; Heat Transfer in Electronic Equipment; Low Temperature Heat Transfer; Computational Heat Transfer. Rio Grande, Puerto Rico, USA. July 8–12, 2012. pp. 417-427. ASME. https://doi.org/10.1115/HT2012-58252
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