A lattice Boltzmann framework to simulate boiling water reactor core hydrodynamics

Prashant K. Jain, Adrian Tentner, Rizwan-uddin

Research output: Contribution to journalArticle

Abstract

This paper presents a consistent LBM formulation for the simulation of a two-phase water-steam system. Results of initial model validation in a range of thermodynamic conditions typical for Boiling Water Reactors (BWRs) are also shown. The interface between the two coexisting phases is captured from the dynamics of the model itself, i.e., no interface tracking is needed. The model is based on the Peng-Robinson (P-R) non-ideal equation of state and can quantitatively approximate the phase-coexistence curve for water at different temperatures ranging from 125 to 325 {ring operator}C. Consequently, coexisting phases with large density ratios (up to ∼1000) may be simulated. Two-phase models in the 200-300 {ring operator}C temperature range are of significant importance to nuclear engineers since most BWRs operate under similar thermodynamic conditions. Simulation of bubbles and droplets in a gravity-free environment of the corresponding coexisting phase until steady state is reached satisfies Laplace law at different temperatures and thus, yield the surface tension of the fluid. Comparing the LBM surface tension thus calculated using the LBM to the corresponding experimental values for water, the LBM lattice unit (lu) can be scaled to the physical units. Using this approach, spatial scaling of the LBM emerges from the model itself and is not imposed externally.

LanguageEnglish (US)
Pages975-986
Number of pages12
JournalComputers and Mathematics with Applications
Volume58
Issue number5
DOIs
StatePublished - Sep 1 2009

Fingerprint

Boiling water reactors
Reactor cores
Lattice Boltzmann
Reactor
Hydrodynamics
Water
Surface Tension
Surface tension
Thermodynamics
Interface Tracking
Phase Coexistence
Ring
Unit
Model Validation
Operator
Bubbles (in fluids)
Laplace
Equations of state
Equation of State
Droplet

Keywords

  • Multiphase
  • Peng-Robinson equation of state
  • Surface tension

ASJC Scopus subject areas

  • Modeling and Simulation
  • Computational Theory and Mathematics
  • Computational Mathematics

Cite this

A lattice Boltzmann framework to simulate boiling water reactor core hydrodynamics. / Jain, Prashant K.; Tentner, Adrian; Rizwan-uddin.

In: Computers and Mathematics with Applications, Vol. 58, No. 5, 01.09.2009, p. 975-986.

Research output: Contribution to journalArticle

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