Numerical simulation of supercritical hydrothermal synthesis with phase change

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Abstract

A numerical method based on the preconditioned method coupled with PROPATH is applied to mixing flows of supercritical water and water liquid in a T-shape channel which is used as a reactor of supercritical hydrothermal synthesis. PROPATH has accurate thermophysical properties of gas, liquid and supercrtical-fluids. Since the thermophysical properties such as density and viscousity change anomalously near the critical point, the mixing flow of supercritical-fluid and liquid is quite different from that of gases or liquids. The calculation ignoring several thermophysical property changes indicates that accurate thermophysical properties are certainly required for evaluating supercritical-fluid flows with phase change. The prediction of buoyancy effecrt to the flows is also quite important to get the real flow fields.

Original languageEnglish
Pages (from-to)771-777
Number of pages7
JournalNihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume76
Issue number765
DOIs
Publication statusPublished - 2010 May

Keywords

  • Hydrothermal synthesis
  • PROPATH
  • Phase change
  • Preconditioning method
  • Supercritical fluids
  • Water

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanical Engineering

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