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    • 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.

    • Author Affiliations


      N S Mahesh1 Johnson Mendonca1 M K Muralidhara1 B K Muralidhara2 C Ramachandra3

      1. Department of Mechanical Engineering, M.S. Ramaiah Institute of Technology, Bangalore 560 054, India
      2. Department of Mechanical Engineering, University Visvesvaraya College of Engineering, Bangalore 560 001, India
      3. Department of Chemical Engineering, Fenn College of Engineering, Cleveland, OH 44115, USA
    • Dates

  • Bulletin of Materials Science | News

    • Dr Shanti Swarup Bhatnagar for Science and Technology

      Posted on October 12, 2020

      Prof. Subi Jacob George — Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru
      Chemical Sciences 2020

      Prof. Surajit Dhara — School of Physics, University of Hyderabad, Hyderabad
      Physical Sciences 2020

    • Editorial Note on Continuous Article Publication

      Posted on July 25, 2019

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