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Progress in understanding and modelling of annular two-phase flows with heat transfer
KTH, School of Engineering Sciences (SCI), Physics, Nuclear Engineering.ORCID iD: 0000-0001-5595-1952
2019 (English)In: Nuclear Engineering and Design, ISSN 0029-5493, E-ISSN 1872-759X, Vol. 345, p. 166-182Article in journal (Refereed) Published
Abstract [en]

Annular two-phase flows with heat transfer play important role in many industrial applications. In particular, thermal margins of Boiling Water Reactors (BWR) are entirely determined by this type of flow and heat transfer conditions. To avoid dryout, a liquid film must be present on heated rods of BWR fuel assemblies during normal operation. The present paper describes the recent progress in understanding and modelling of the governing phenomena of annular two-phase flow and heat transfer. A special attention has been devoted to experimental observations that have the most significant influence on the adopted modelling approach. The primary goal is to pave a path to mechanistic modelling of dryout and post-dryout heat transfer applicable to nuclear fuel assemblies. Current Computational Fluid Dynamics (CFD) approaches to model the governing phenomena are presented and their further improvements are suggested.

Place, publisher, year, edition, pages
Elsevier, 2019. Vol. 345, p. 166-182
Keywords [en]
Annular flow, Droplets, Dryout, Liquid film, Post-dryout
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-246448DOI: 10.1016/j.nucengdes.2019.02.007ISI: 000460659300015Scopus ID: 2-s2.0-85062033228OAI: oai:DiVA.org:kth-246448DiVA, id: diva2:1297183
Note

QC 20190319

Available from: 2019-03-19 Created: 2019-03-19 Last updated: 2019-03-27Bibliographically approved

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Anglart, Henryk

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