Computational simulation on performance enhancement of cold gas dynamic spray processes with electrostatic assist

Hidemasa Takana, Kazuhiro Ogawa, Tetsuo Shoji, Hideya Nishiyama

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

A real-time computational simulation on the entire cold spray process is carried out by the integrated model of compressible flow field, splat formation model, and coating formation model, in order to provide the fundamental data for the advanced high performance cold gas dynamic spray process with electrostatic acceleration. In this computation, viscous drag force, flow acceleration added mass, gravity, Basset history force, Saffman lift force, Brownian motion, thermophoresis, and electrostatic force are all considered in the particle equation of motion for the more realistic prediction of in-flight nano/microparticle characteristics with electrostatic force and also for the detailed analysis of particle-shock-wave-substrate interaction. Computational results show that electrostatic acceleration can broaden the smallest size of applicable particle diameter for successful adhesion; as a result, wider coating can be realized. The utilization of electrostatic acceleration enhances the performance of cold dynamic spray process even under the presence of unavoidable shock wave.

Original languageEnglish
Pages (from-to)817011-817017
Number of pages7
JournalJournal of Fluids Engineering, Transactions of the ASME
Volume130
Issue number8
DOIs
Publication statusPublished - 2008 Aug 1

Keywords

  • Cold gas dynamic spray
  • Computational simulation
  • Nano/microparticle
  • Particle-shock-wave-substrate interactions
  • Shock wave
  • Supersonic jet

ASJC Scopus subject areas

  • Mechanical Engineering

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