Coupled Monte Carlo Transport and Conjugate Heat Transfer for Wire-Wrapped Bundles Within the MOOSE Framework

A. J. Novak, P. Shriwise, P. K. Romano, R. Rahaman, E. Merzari, D. Gaston

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


Cardinal is an open-source application that couples OpenMC Monte Carlo transport and NekRS computational fluid dynamics (CFD) to the Multiphysics Object-Oriented Simulation Environment (MOOSE), closing neutronics and thermal-fluid gaps in conducting high-resolution multiscale and multiphysics analyses of nuclear systems. We first provide a brief introduction to Cardinal’s software design, data mapping, and coupling strategy to highlight our approach to overcoming common challenges in high-fidelity multiphysics simulations. We then present two Cardinal simulations for hexagonal pin bundles. The first is a validation of Cardinal’s conjugate heat transfer coupling of NekRS’s Reynolds-Averaged Navier Stokes model with MOOSE’s heat conduction physics for a bare seven-pin Freon-12 bundle flow experiment. Predictions for pin surface temperatures under three different heating modes agree reasonably well with experimental data and similar CFD modeling from the literature. The second simulation is a multiphysics coupling of OpenMC, NekRS, and BISON for a reduced-scale, seven-pin wire-wrapped version of an Advanced Burner Reactor bundle. Wire wraps are approximated using a momentum source model, and coupled predictions are provided for velocity, temperature, and power distribution.

Original languageEnglish (US)
Pages (from-to)2561-2584
Number of pages24
JournalNuclear Science and Engineering
Issue number10
StatePublished - 2023

All Science Journal Classification (ASJC) codes

  • Nuclear Energy and Engineering


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