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Title: Simulation of Boiling Two-Phase Flow in a Helical Coil Steam Generator Using the Spectral Element Code Nek-2P

Abstract

To enable the design of a light water small modular reactor, the boiling flow inside a helical coil steam generator has been simulated with the two-fluid model in Nek-2P. Nek-2P is the multiphase branch of the spectral element code Nek5000. Details of the implementation of the two-fluid model and the included closure models are discussed. The presented closure models include interactions for momentum, heat, and mass transfer between phases. Models for the drag, lift, and turbulent dispersion forces are included. The complete model is fully consistent in the limits of both phasic volume fractions approaching zero and is able to simulate flows of dispersed vapor, continuous liquid, dispersed liquid, continuous vapor, or any combination thereof. The closure models and their implementation in Nek-2P have been validated by comparing to experimental data for a boiling flow, demonstrating excellent agreement. Results from the simulation of the helical coil indicate strong phasic separation driven by the effects of buoyancy and inertia. Significant differences were observed in the results compared to simulations performed using Star-CCM+, although these differences were somewhat expected.

Authors:
ORCiD logo [1];  [2];  [3];  [1];  [1];  [4];  [1]
  1. Argonne National Lab. (ANL), Lemont, IL (United States)
  2. AER Consulting, Half Moon Bay, CA (United States)
  3. Aristotle Univ. of Thessaloniki, Thessaloniki (Greece)
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Nuclear Energy (NE)
OSTI Identifier:
1607420
Alternate Identifier(s):
OSTI ID: 1657993
Grant/Contract Number:  
AC02-06CH11357; AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Nuclear Technology
Additional Journal Information:
Journal Volume: 206; Journal Issue: 2; Journal ID: ISSN 0029-5450
Publisher:
Taylor & Francis - formerly American Nuclear Society (ANS)
Country of Publication:
United States
Language:
English
Subject:
22 GENERAL STUDIES OF NUCLEAR REACTORS; helical coil steam generator; multiphase computational fluid dynamics; spectral elements

Citation Formats

Shaver, Dillon R., Salpeter, Nate, Tomboulides, Ananias, Vegendla, Prasad, Tentner, Adrian, Pointer, W. David, and Merzari, Elia. Simulation of Boiling Two-Phase Flow in a Helical Coil Steam Generator Using the Spectral Element Code Nek-2P. United States: N. p., 2019. Web. https://doi.org/10.1080/00295450.2019.1664199.
Shaver, Dillon R., Salpeter, Nate, Tomboulides, Ananias, Vegendla, Prasad, Tentner, Adrian, Pointer, W. David, & Merzari, Elia. Simulation of Boiling Two-Phase Flow in a Helical Coil Steam Generator Using the Spectral Element Code Nek-2P. United States. https://doi.org/10.1080/00295450.2019.1664199
Shaver, Dillon R., Salpeter, Nate, Tomboulides, Ananias, Vegendla, Prasad, Tentner, Adrian, Pointer, W. David, and Merzari, Elia. Thu . "Simulation of Boiling Two-Phase Flow in a Helical Coil Steam Generator Using the Spectral Element Code Nek-2P". United States. https://doi.org/10.1080/00295450.2019.1664199. https://www.osti.gov/servlets/purl/1607420.
@article{osti_1607420,
title = {Simulation of Boiling Two-Phase Flow in a Helical Coil Steam Generator Using the Spectral Element Code Nek-2P},
author = {Shaver, Dillon R. and Salpeter, Nate and Tomboulides, Ananias and Vegendla, Prasad and Tentner, Adrian and Pointer, W. David and Merzari, Elia},
abstractNote = {To enable the design of a light water small modular reactor, the boiling flow inside a helical coil steam generator has been simulated with the two-fluid model in Nek-2P. Nek-2P is the multiphase branch of the spectral element code Nek5000. Details of the implementation of the two-fluid model and the included closure models are discussed. The presented closure models include interactions for momentum, heat, and mass transfer between phases. Models for the drag, lift, and turbulent dispersion forces are included. The complete model is fully consistent in the limits of both phasic volume fractions approaching zero and is able to simulate flows of dispersed vapor, continuous liquid, dispersed liquid, continuous vapor, or any combination thereof. The closure models and their implementation in Nek-2P have been validated by comparing to experimental data for a boiling flow, demonstrating excellent agreement. Results from the simulation of the helical coil indicate strong phasic separation driven by the effects of buoyancy and inertia. Significant differences were observed in the results compared to simulations performed using Star-CCM+, although these differences were somewhat expected.},
doi = {10.1080/00295450.2019.1664199},
journal = {Nuclear Technology},
number = 2,
volume = 206,
place = {United States},
year = {2019},
month = {12}
}

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