Detached eddy simulation and large eddy simulation models for the simulation of gas entrainment

E. Merzari, H. Ninokata, E. Baglietto

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

1 Scopus citations

Abstract

The eventual entrainment of gas bubbles in the reactor core of a Light Metal Fast Breeder Reactors (LMFBR) may cause an effective increase in reactivity as in the current state of the art LMFBRs have usually a positive void coefficient. Since this may have a negative effect on safety and operation, the possibility of gas entrainment needs to be evaluated in the thermal-hydraulics design. Several studies on the gas entrainment in a LMFBR system have been conducted over the years (Eguchi et al, 199410). The most common situations that may lead to gas entrainment have been classified into vortex dimple, concave free surface and breaking wave. Among these, the vortex-induced gas entrainment phenomenon is considered in the present work, because more likely to be present in operating or accidental conditions. The focus is on the issue of turbulence modeling for the simulation of gas-entraining vortexes, and in particular for the case of Moriya13. We will propose two different approaches: a large eddy simulation and a detached eddy simulation. Results are in excellent agreement with the experiment for the radial velocity even if no surface model has been employed.

Original languageEnglish (US)
Title of host publicationSociete Francaise d'Energie Nucleaire - International Congress on Advances in Nuclear Power Plants - ICAPP 2007, "The Nuclear Renaissance at Work"
Pages2669-2677
Number of pages9
Publication statusPublished - Oct 1 2008
EventSociete Francaise d'Energie Nucleaire - International Congress on Advances in Nuclear Power Plants - ICAPP 2007, "The Nuclear Renaissance at Work" - Nice, France
Duration: May 13 2007May 18 2007

Publication series

NameSociete Francaise d'Energie Nucleaire - International Congress on Advances in Nuclear Power Plants - ICAPP 2007, "The Nuclear Renaissance at Work"
Volume5

Other

OtherSociete Francaise d'Energie Nucleaire - International Congress on Advances in Nuclear Power Plants - ICAPP 2007, "The Nuclear Renaissance at Work"
CountryFrance
CityNice
Period5/13/075/18/07

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All Science Journal Classification (ASJC) codes

  • Nuclear Energy and Engineering

Cite this

Merzari, E., Ninokata, H., & Baglietto, E. (2008). Detached eddy simulation and large eddy simulation models for the simulation of gas entrainment. In Societe Francaise d'Energie Nucleaire - International Congress on Advances in Nuclear Power Plants - ICAPP 2007, "The Nuclear Renaissance at Work" (pp. 2669-2677). (Societe Francaise d'Energie Nucleaire - International Congress on Advances in Nuclear Power Plants - ICAPP 2007, "The Nuclear Renaissance at Work"; Vol. 5).