Optimization of cold gas dynamic spray processes by computational simulation

Hidemasa Takana, Tetsuo Shoji, Kazuhiro Ogawa, Hideya Nishiyama

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

An integrated model of compressible thermofluid, splat formation and coating formation for a cold dynamic spray process has been established. In-flight behavior of nano-micro particles and the interaction between the shock wave and the particles in a supersonic jet flow impinging onto the substrate and further particle acceleration with electrostatic force are clarified in detail by considering viscous drag force, flow acceleration, added mass, gravity, Basset history force, Saffman lift force, Brownian motion, thermophores is and electrostatic force. The effect of electrostatic acceleration becomes more significant with the decrease in particle diameter even in the presence of unavoidable shock wave. As a result, electrostatic acceleration can broaden the application range of operating particle diameter in a cold gas dynamic spray process to form a robust and activated coating. Finally, based on the integrated model, the coating thickness characteristics in an electrostatic assisted cold dynamic spray process are evaluated.

Original languageEnglish
Title of host publication2007 Proceedings of the 5th Joint ASME/JSME Fluids Engineering Summer Conference, FEDSM 2007
Pages1569-1577
Number of pages9
EditionPART B
DOIs
Publication statusPublished - 2007 Dec 1
Event2007 5th Joint ASME/JSME Fluids Engineering Summer Conference, FEDSM 2007 - San Diego, CA, United States
Duration: 2007 Jul 302007 Aug 2

Publication series

Name2007 Proceedings of the 5th Joint ASME/JSME Fluids Engineering Summer Conference, FEDSM 2007
NumberPART B
Volume1 SYMPOSIA

Other

Other2007 5th Joint ASME/JSME Fluids Engineering Summer Conference, FEDSM 2007
CountryUnited States
CitySan Diego, CA
Period07/7/3007/8/2

Keywords

  • Cold gas dynamic spray
  • Computational simulation
  • Nano-micro particle
  • Shock wave
  • Substrate interactions
  • Supersonic jet

ASJC Scopus subject areas

  • Mechanical Engineering
  • Condensed Matter Physics

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