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Modeling of droplet dynamic and thermal behaviour during spray deposition
N S Mahesh Johnson Mendonca M K Muralidhara B K Muralidhara C Ramachandra
Modeling Studies Volume 26 Issue 3 April 2003 pp 355-364
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https://www.ias.ac.in/article/fulltext/boms/026/03/0355-0364 -
Keywords
Supersonic atomization ;droplets ;thermal history ;solid fraction ;secondary dendrite arm spacing. -
Abstract
Mathematical modeling of supersonic gas atomization for spray forming has been investigated. Influence of the droplet dynamic and thermal behaviour on the resultant microstructure has been studied. Analytical models have been constructed taking into account the higher Reynolds number owing to supersonic gas flow. The impact velocity profiles of the droplets lend credence to the evolution of equiaxed grain morphology through dendrite fragmentation. The thermal history profile along with the fraction solid plot could yield optimized standoff distance to obtain a mushy droplet. A comparison of secondary dendrite arm spacing obtained from the mathematical model showed good agreement with experimental observations.
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Author Affiliations
N S Mahesh1 Johnson Mendonca1 M K Muralidhara1 B K Muralidhara2 C Ramachandra3
- Department of Mechanical Engineering, M.S. Ramaiah Institute of Technology, Bangalore 560 054, India
- Department of Mechanical Engineering, University Visvesvaraya College of Engineering, Bangalore 560 001, India
- Department of Chemical Engineering, Fenn College of Engineering, Cleveland, OH 44115, USA
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Dates
- Published
- April 2003
- Manuscript received
- 3 October 2002
- Manuscript revised
- 7 January 2003
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Bulletin of Materials Science
Volume 46, 2023
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