CFD method has the potential to simulate the detailed three-dimensional flow and heat
transfer features in nuclear reactors, and is promising to play a more important role in the …

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 …

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 …

Complex flow structure interactions and heat transfer processes take place in nuclear
reactor cores. Given the extreme pressure/temperature and radioactive conditions inside the …

We present new results on the strong parallel scaling for the OpenACC-accelerated
implementation of the high-order spectral element fluid dynamics solver Nek5000. The test …

Abstract Characterization of parallel flow through rod bundles is of key importance in
assessing the performance and safety of several engineering systems, including a majority …

Numerical simulation is an intrinsic part of nuclear engineering research supporting the
design of nuclear power plants. With the advent of Petascale computing (ie, computers …

The spectral element code Nek5000 is an open-source, higher-order computational fluid
dynamics code developed at Argonne National Laboratory. It is designed to solve …

In this paper, we propose a novel reduced order model (ROM) lengthscale that is
constructed by using energy distribution arguments. The new energy-based ROM …

Turbulent mixing is an important thermal hydraulic phenomenon in the reactor core rod
bundles and it leads to strong momentum and energy transfer among adjacent subchannels …