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Design of Turbulent In-situ Mixing Mixer and Fabrication of Cu-TiB2 Nanocomposities

난류 용탕 In-situ 합성 믹서의 설계 및 Cu-TiB2 나노 복합재료의 제조

  • Choi, Baek-Boo (School of Material Science and Engineering, Pusan National University) ;
  • Park, Jung-Su (School of Material Science and Engineering, Pusan National University) ;
  • Yun, Ji-Hun (School of Material Science and Engineering, Pusan National University) ;
  • Ha, Man-Young (Department of Mechanical Engineering, Pusan National University) ;
  • Park, Yong-Ho (School of Material Science and Engineering, Pusan National University) ;
  • Park, Ik-Min (School of Material Science and Engineering, Pusan National University)
  • Published : 2007.01.27

Abstract

Turbulent in-situ mixing process is a new material process technology to get dispersed phase in nanometer size by controlling reaction of liquid/solid, liquid/gas, flow ana solidification speed simultaneously. In this study, mixing which is the key technology to this synthesis method was studied by computational fluid dynamics. For the simulation of mixing of liquid metal, static mixers investigated. Two inlets for different liquid metal meet ana merge like 'Y' shape tube having various shapes and radios of curve. The performance of mixer was evaluated with quantitative analysis with coefficient of variance of mass fraction. Also, detailed plots of intersection were presented to understand effect of mixer shape on mixing. The simulations show that the Reynolds number (Re) is the important factor to mixing and dispersion of $TiB_2$ particles. Mixer was designed according to the simulation, and $Cu-TiB_2$ nano composites were evaluated. $TiB_2$ nano particles were uniformly dispersed when Re was 1000, and cluster formation and reduction in volume fraction of $TiB_2$ were found at higher Re.

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