Toward exascale: overview of large eddy simulations and direct numerical simulations of nuclear reactor flows with the spectral element method in Nek5000

E Merzari, P Fischer, M Min, S Kerkemeier… - Nuclear …, 2020 - Taylor & Francis
At the beginning of the last decade, Petascale supercomputers (ie, computers capable of
more than 1 petaFLOP) emerged. Now, at the dawn of exascale supercomputing, we …

A review of recent advances in HTGR CFD and thermal fluid analysis

AJ Huning, S Chandrasekaran, S Garimella - Nuclear Engineering and …, 2021 - Elsevier
Abstract The High Temperature Gas-cooled Reactor (HTGR) is an advanced reactor design
being pursued by several different domestic and international organizations due to its high …

Cardinal: A lower-length-scale multiphysics simulator for pebble-bed reactors

E Merzari, H Yuan, M Min, D Shaver… - Nuclear …, 2021 - Taylor & Francis
This paper demonstrates a multiphysics solver for pebble-bed reactors, in particular, for
Berkeley's pebble-bed-fluoride-salt-cooled high-temperature reactor (PB-FHR)(Mark I …

Experimental investigation of the variation of the local gas velocities in a cold flow pebble bed reactor (PBR) using a hot wire anemometry technique

M Alshammari, A Alalou, HA Alhameedi… - … Engineering and Design, 2023 - Elsevier
Obtaining accurate results and new benchmark data for the local velocity of the gas flowing
within the pebble bed reactor (PBR) is a key step for understanding and benchmarking …

Optimization of full-core reactor simulations on Summit

M Min, YH Lan, P Fischer, E Merzari… - … Conference for High …, 2022 - ieeexplore.ieee.org
Nek5000/RS, a highly-performant open-source spectral element code, has recently
achieved an unprecedented milestone in the simulation of nuclear reactors: the first full core …

Flow characteristics within an interior subchannel of a 61-pin wire-wrapped hexagonal rod bundle with a porous blockage

C Menezes, T Melsheimer, DW Pyle, M Kinsky… - Physics of …, 2023 - pubs.aip.org
Potential accumulation of undesirable debris in a subchannel of a Liquid Metal Fast Reactor
(LMFR) hexagonal fuel bundle presents accident conditions, which are crucial to investigate …

Experimental characterization of pressure and friction factor in an interior subchannel of a 61-pin wire-wrapped rod bundle with a porous blockage

C Menezes, M Kinsky, DW Pyle, YA Hassan - Physics of Fluids, 2023 - pubs.aip.org
Comprehending and counteracting accident conditions presented by impedances of flow in
diminutive subchannels of a Liquid Metal Fast Reactor (LMFR) hexagonal rod bundle are …

Feasibility of full-core pin resolved CFD simulations of small modular reactor with momentum sources

J Fang, DR Shaver, A Tomboulides, M Min… - … Engineering and Design, 2021 - Elsevier
Complex flow structure interactions and heat transfer processes take place in nuclear
reactor cores. Given the extreme pressure/temperature and radioactive conditions inside the …

Pressure drop correlation improvement for the near-wall region of pebble-bed reactors

D Reger, E Merzari, P Balestra, S Schunert… - Nuclear …, 2023 - Taylor & Francis
Packed beds play an important role in many engineering fields, with their applications in
nuclear energy being driven by the development of next-generation reactors utilizing pebble …

Toward improved correlations for mixed convection in the downcomer of molten salt reactors

T Nguyen, E Merzari, CK Tai, IA Bolotnov… - Nuclear …, 2024 - Taylor & Francis
Developing heat transfer correlations for buoyancy-driven flows and mixed convection is
challenging, especially if the fluid's Prandtl (Pr) number is not close to 1. For advanced …