Large-scale large eddy simulation of nuclear reactor flows: Issues and perspectives
Abstract
Numerical simulation has been an intrinsic part of nuclear engineering research since its inception. In recent years a transition is occurring toward predictive, first-principle-based tools such as computational fluid dynamics. Even with the advent of petascale computing, however, such tools still have significant limitations. In the present work some of these issues, and in particular the presence of massive multiscale separation, are discussed, as well as some of the research conducted to mitigate them. Petascale simulations at high fidelity (large eddy simulation/direct numerical simulation) were conducted with the massively parallel spectral element code Nek5000 on a series of representative problems. These simulations shed light on the requirements of several types of simulation: (1) axial flow around fuel rods, with particular attention to wall effects; (2) natural convection in the primary vessel; and (3) flow in a rod bundle in the presence of spacing devices. Finally, the focus of the work presented here is on the lessons learned and the requirements to perform these simulations at exascale. Additional physical insight gained from these simulations is also emphasized.
- Authors:
-
- Argonne National Lab. (ANL), Argonne, IL (United States). Mathematics and Computer Science Division
- Argonne National Lab. (ANL), Argonne, IL (United States). Nuclear Engineering Division
- Publication Date:
- Research Org.:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1374567
- Alternate Identifier(s):
- OSTI ID: 1397965
- Grant/Contract Number:
- AC02-06CH11357
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Nuclear Engineering and Design
- Additional Journal Information:
- Journal Volume: 312; Journal Issue: C; Journal ID: ISSN 0029-5493
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 97 MATHEMATICS AND COMPUTING; 22 GENERAL STUDIES OF NUCLEAR REACTORS; CFD; Large Eddy Simulation; Exascale; Large-Scale Simulations
Citation Formats
Merzari, Elia, Obabko, Aleks, Fischer, Paul, Halford, Noah, Walker, Justin, Siegel, Andrew, and Yu, Yiqi. Large-scale large eddy simulation of nuclear reactor flows: Issues and perspectives. United States: N. p., 2016.
Web. doi:10.1016/j.nucengdes.2016.09.028.
Merzari, Elia, Obabko, Aleks, Fischer, Paul, Halford, Noah, Walker, Justin, Siegel, Andrew, & Yu, Yiqi. Large-scale large eddy simulation of nuclear reactor flows: Issues and perspectives. United States. https://doi.org/10.1016/j.nucengdes.2016.09.028
Merzari, Elia, Obabko, Aleks, Fischer, Paul, Halford, Noah, Walker, Justin, Siegel, Andrew, and Yu, Yiqi. Thu .
"Large-scale large eddy simulation of nuclear reactor flows: Issues and perspectives". United States. https://doi.org/10.1016/j.nucengdes.2016.09.028. https://www.osti.gov/servlets/purl/1374567.
@article{osti_1374567,
title = {Large-scale large eddy simulation of nuclear reactor flows: Issues and perspectives},
author = {Merzari, Elia and Obabko, Aleks and Fischer, Paul and Halford, Noah and Walker, Justin and Siegel, Andrew and Yu, Yiqi},
abstractNote = {Numerical simulation has been an intrinsic part of nuclear engineering research since its inception. In recent years a transition is occurring toward predictive, first-principle-based tools such as computational fluid dynamics. Even with the advent of petascale computing, however, such tools still have significant limitations. In the present work some of these issues, and in particular the presence of massive multiscale separation, are discussed, as well as some of the research conducted to mitigate them. Petascale simulations at high fidelity (large eddy simulation/direct numerical simulation) were conducted with the massively parallel spectral element code Nek5000 on a series of representative problems. These simulations shed light on the requirements of several types of simulation: (1) axial flow around fuel rods, with particular attention to wall effects; (2) natural convection in the primary vessel; and (3) flow in a rod bundle in the presence of spacing devices. Finally, the focus of the work presented here is on the lessons learned and the requirements to perform these simulations at exascale. Additional physical insight gained from these simulations is also emphasized.},
doi = {10.1016/j.nucengdes.2016.09.028},
journal = {Nuclear Engineering and Design},
number = C,
volume = 312,
place = {United States},
year = {Thu Nov 03 00:00:00 EDT 2016},
month = {Thu Nov 03 00:00:00 EDT 2016}
}
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Works referencing / citing this record:
Direct Numerical Simulation and Wall-Resolved Large Eddy Simulation in Nuclear Thermal Hydraulics
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- Tiselj, Iztok; Flageul, Cedric; Oder, Jure
- Nuclear Technology, Vol. 206, Issue 2