nekCRF: A next generation high-order reactive low Mach flow solver for direct numerical simulations

TL;DR

The paper introduces nekCRF, a high-order reactive low Mach flow solver optimized for exascale computing, enabling high-fidelity simulations of chemically reactive flows to improve combustion efficiency and reduce emissions.

Contribution

It presents nekCRF, a novel high-order reactive flow solver designed for exascale systems, demonstrating its capabilities and validation on a GPU-based supercomputer.

Findings

Validated across diverse flow cases

Achieved high efficiency on GPU supercomputers

Enabled high-fidelity reactive flow simulations

Abstract

Exascale computing enables high-fidelity simulations of chemically reactive flows in practical geometries and conditions, and paves the way for valuable insights that can optimize combustion processes, ultimately reducing emissions and improving fuel combustion efficiency. However, this requires software that can fully leverage the capabilities of current high performance computing systems. The paper introduces nekCRF, a high-order reactive low Mach flow solver specifically designed for this purpose. Its capabilities and efficiency are showcased on the pre-exascale system JUWELS Booster, a GPU-based supercomputer at the J\"{u}lich Supercomputing Centre including a validation across diverse cases of varying complexity.