Constitutive equations for vertical upward two-phase flow in rod bundle

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

9 Scopus Citations
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Author(s)

  • Tetsuhiro Ozaki
  • Xiuzhong Shen
  • Shuichiro Miwa
  • Ikuo Kinoshita
  • Tatsuya Hazuku
  • Somboon Rassame

Detail(s)

Original languageEnglish
Pages (from-to)1252-1266
Journal / PublicationInternational Journal of Heat and Mass Transfer
Volume127
Publication statusPublished - 1 Dec 2018
Externally publishedYes

Abstract

In view of the quality assurance of two-phase flow simulations, CSAU (Code Scalability, Applicability, and Uncertainty) methodology and code V & V (Verification and Validation) have been proposed. The estimation of simulation uncertainty is indispensable in using best-estimate computational codes. A key of successful two-phase flow simulations is to use the state-of-the-art constitutive equations to close the mathematical system used in two-phase flow analyses. The advanced constitutive equations should be developed based on “physics” behind phenomena and should consider scaling parameters which enable their application beyond test conditions used for a code validation. Two-phase flow simulations in a rod bundle is important in various industrial apparatuses such as heat exchangers and nuclear reactors. Constitutive equations for two-phase flows in a vertical rod bundles have been advanced in recent five years. In view of this, this paper provides a comprehensive review of most advanced constitutive equations for two-phase flow analyses in a vertical rod bundle. The constitutive equations of two-phase flow parameters reviewed in this paper are flow regime map, void fraction, void fraction covariance and relative velocity covariance, interfacial area concentration and wall friction. In addition, an exact formulation of one-dimensional momentum equation in two-fluid model considering void fraction distribution is discussed.

Research Area(s)

  • Covariance, Flow regime, Interfacial area concentration, Rod bundle, Void fraction

Bibliographic Note

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Citation Format(s)

Constitutive equations for vertical upward two-phase flow in rod bundle. / Hibiki, Takashi; Ozaki, Tetsuhiro; Shen, Xiuzhong; Miwa, Shuichiro; Kinoshita, Ikuo; Hazuku, Tatsuya; Rassame, Somboon.

In: International Journal of Heat and Mass Transfer, Vol. 127, 01.12.2018, p. 1252-1266.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review