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Title: Direct numerical simulation of reactor two-phase flows enabled by high-performance computing

Abstract

Nuclear reactor two-phase flows remain a great engineering challenge, where the high-resolution two-phase flow database which can inform practical model development is still sparse due to the extreme reactor operation conditions and measurement difficulties. Owing to the rapid growth of computing power, the direct numerical simulation (DNS) is enjoying a renewed interest in investigating the related flow problems. A combination between DNS and an interface tracking method can provide a unique opportunity to study two-phase flows based on first principles calculations. More importantly, state-of-the-art high-performance computing (HPC) facilities are helping unlock this great potential. This paper reviews the recent research progress of two-phase flow DNS related to reactor applications. The progress in large-scale bubbly flow DNS has been focused not only on the sheer size of those simulations in terms of resolved Reynolds number, but also on the associated advanced modeling and analysis techniques. Specifically, the current areas of active research include modeling of sub-cooled boiling, bubble coalescence, as well as the advanced post-processing toolkit for bubbly flow simulations in reactor geometries. A novel bubble tracking method has been developed to track the evolution of bubbles in two-phase bubbly flow. Also, spectral analysis of DNS database in different geometries hasmore » been performed to investigate the modulation of the energy spectrum slope due to bubble-induced turbulence. In addition, the single-and two-phase analysis results are presented for turbulent flows within the pressurized water reactor (PWR) core geometries. The related simulations are possible to carry out only with the world leading HPC platforms. These simulations are allowing more complex turbulence model development and validation for use in 3D multiphase computational fluid dynamics (M-CFD) codes.« less

Authors:
; ; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Nuclear Energy - Consortium for Advanced Simulation of LIght Water Reactors (CASL)
OSTI Identifier:
1434327
DOE Contract Number:  
AC02-06CH11357
Resource Type:
Journal Article
Resource Relation:
Journal Name: Nuclear Engineering and Design; Journal Volume: 330; Journal Issue: C
Country of Publication:
United States
Language:
English
Subject:
Bubble Tracking Method; DNS; Interface Tracking Method; Two-phase Flow

Citation Formats

Fang, Jun, Cambareri, Joseph J., Brown, Cameron S., Feng, Jinyong, Gouws, Andre, Li, Mengnan, and Bolotnov, Igor A. Direct numerical simulation of reactor two-phase flows enabled by high-performance computing. United States: N. p., 2018. Web. doi:10.1016/j.nucengdes.2018.02.024.
Fang, Jun, Cambareri, Joseph J., Brown, Cameron S., Feng, Jinyong, Gouws, Andre, Li, Mengnan, & Bolotnov, Igor A. Direct numerical simulation of reactor two-phase flows enabled by high-performance computing. United States. doi:10.1016/j.nucengdes.2018.02.024.
Fang, Jun, Cambareri, Joseph J., Brown, Cameron S., Feng, Jinyong, Gouws, Andre, Li, Mengnan, and Bolotnov, Igor A. Sun . "Direct numerical simulation of reactor two-phase flows enabled by high-performance computing". United States. doi:10.1016/j.nucengdes.2018.02.024.
@article{osti_1434327,
title = {Direct numerical simulation of reactor two-phase flows enabled by high-performance computing},
author = {Fang, Jun and Cambareri, Joseph J. and Brown, Cameron S. and Feng, Jinyong and Gouws, Andre and Li, Mengnan and Bolotnov, Igor A.},
abstractNote = {Nuclear reactor two-phase flows remain a great engineering challenge, where the high-resolution two-phase flow database which can inform practical model development is still sparse due to the extreme reactor operation conditions and measurement difficulties. Owing to the rapid growth of computing power, the direct numerical simulation (DNS) is enjoying a renewed interest in investigating the related flow problems. A combination between DNS and an interface tracking method can provide a unique opportunity to study two-phase flows based on first principles calculations. More importantly, state-of-the-art high-performance computing (HPC) facilities are helping unlock this great potential. This paper reviews the recent research progress of two-phase flow DNS related to reactor applications. The progress in large-scale bubbly flow DNS has been focused not only on the sheer size of those simulations in terms of resolved Reynolds number, but also on the associated advanced modeling and analysis techniques. Specifically, the current areas of active research include modeling of sub-cooled boiling, bubble coalescence, as well as the advanced post-processing toolkit for bubbly flow simulations in reactor geometries. A novel bubble tracking method has been developed to track the evolution of bubbles in two-phase bubbly flow. Also, spectral analysis of DNS database in different geometries has been performed to investigate the modulation of the energy spectrum slope due to bubble-induced turbulence. In addition, the single-and two-phase analysis results are presented for turbulent flows within the pressurized water reactor (PWR) core geometries. The related simulations are possible to carry out only with the world leading HPC platforms. These simulations are allowing more complex turbulence model development and validation for use in 3D multiphase computational fluid dynamics (M-CFD) codes.},
doi = {10.1016/j.nucengdes.2018.02.024},
journal = {Nuclear Engineering and Design},
number = C,
volume = 330,
place = {United States},
year = {Sun Apr 01 00:00:00 EDT 2018},
month = {Sun Apr 01 00:00:00 EDT 2018}
}