Void fraction covariance in two-phase flows

Caleb Brooks, Yang Liu, Takashi Hibiki, Mamoru Ishii

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A void fraction covariance in the expression for area-averaged local relative velocity has been assumed to be one by current and past researchers. Similarly, in a multi-bubble group approach, void covariances for each bubble group appear in the group area-averaged relative velocity expressions. The covariance terms have been analyzed with a substantial database from literature including upward flow in pipe diameters of 1.27 cm to 15.2 cm, downward flow in pipe diameters of 2.54 cm and 5.08 cm, and upward flow in an annulus (Dh=1.9cm) under adiabatic, boiling, and condensing conditions. Simple relations are proposed to specify the covariance in order to improve the prediction of area-averaged local relative velocity. The correlations were found to agree well with the experimental data for the flow configurations and conditions analyzed.

Original languageEnglish (US)
Title of host publication2012 20th International Conference on Nuclear Engineering and the ASME 2012 Power Conference, ICONE 2012-POWER 2012
PublisherAmerican Society of Mechanical Engineers (ASME)
Pages487-495
Number of pages9
Edition1
ISBN (Print)9780791844977
DOIs
StatePublished - Jan 1 2012
Externally publishedYes
Event2012 20th International Conference on Nuclear Engineering and the ASME 2012 Power Conference, ICONE 2012-POWER 2012 - Anaheim, CA, United States
Duration: Jul 30 2012Aug 3 2012

Publication series

NameInternational Conference on Nuclear Engineering, Proceedings, ICONE
Number1
Volume3

Other

Other2012 20th International Conference on Nuclear Engineering and the ASME 2012 Power Conference, ICONE 2012-POWER 2012
CountryUnited States
CityAnaheim, CA
Period7/30/128/3/12

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ASJC Scopus subject areas

  • Nuclear Energy and Engineering

Cite this

Brooks, C., Liu, Y., Hibiki, T., & Ishii, M. (2012). Void fraction covariance in two-phase flows. In 2012 20th International Conference on Nuclear Engineering and the ASME 2012 Power Conference, ICONE 2012-POWER 2012 (1 ed., pp. 487-495). (International Conference on Nuclear Engineering, Proceedings, ICONE; Vol. 3, No. 1). American Society of Mechanical Engineers (ASME). https://doi.org/10.1115/ICONE20-POWER2012-54594