Two-group drift-flux model for closure of the modified two-fluid model

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

45 Scopus Citations
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Author(s)

  • Caleb S. Brooks
  • Sidharth S. Paranjape
  • Basar Ozar
  • Takashi Hibiki
  • Mamoru Ishii

Detail(s)

Original languageEnglish
Pages (from-to)196-208
Journal / PublicationInternational Journal of Heat and Fluid Flow
Volume37
Publication statusPublished - Oct 2012
Externally publishedYes

Abstract

In an effort to improve the prediction of void fraction and heat transfer characteristics in two-phase systems, closure relations to the one-dimensional modified two-fluid model are addressed. The drift-flux general expression is extended to two bubble groups in order to describe the void weighted mean gas velocities of spherical/distorted (group-1) bubbles and cap/slug/churn-turbulent (group-2) bubbles. Therefore, correlations for group-1 and group-2 distribution parameters and drift velocities are proposed and evaluated with experimental data. Furthermore, the covariance in the convective flux of the one-dimensional two-fluid model is addressed and interpreted with the available database. The dataset chosen for evaluation of the two-group drift-flux general expression contains 126 total data points taken in an annulus geometry. The proposed distribution parameters show an agreement within ±4.9% and ±1.2% for group-1 and group-2 data, respectively. The overall estimation of group-1 and group-2 void weighted mean gas velocity calculated with the newly proposed two-group drift-flux general expression shows an agreement of ±11.8% and ±17.7%, respectively. © 2012 Elsevier Inc.

Research Area(s)

  • Annulus, Bubbly flow, Cap bubble, Covariance, Distribution parameter, Drift velocity, Drift-flux model, Interfacial area transport, Two-fluid model, Void fraction

Bibliographic Note

Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to lbscholars@cityu.edu.hk.

Citation Format(s)

Two-group drift-flux model for closure of the modified two-fluid model. / Brooks, Caleb S.; Paranjape, Sidharth S.; Ozar, Basar; Hibiki, Takashi; Ishii, Mamoru.

In: International Journal of Heat and Fluid Flow, Vol. 37, 10.2012, p. 196-208.

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