High-Resolution Simulations of H₂/O₂ Detonations

The accurate simulation of gaseous combustion is difficult due to the multi-scale nature and geometrical complexity of detonation and deflagration waves. To address this difficulty, coarse-grained simulations were performed which take advantage of accelerated compute architectures. High-resolution, three-dimensional, large eddy simulations of the detonation of pre-mixed H₂/O₂ were performed with FURY, a GPU capable, compressible flow solver. The purpose of these simulations is to validate the FURY code for reactive flows, to demonstrate and quantify the code performance and scaling characteristics on GPU clusters, and to generate high-resolution reference solutions for the development of reaction and interface models. For these simulations, detonation waves were initiated by prescribing a point-like hot spot within a volume of pre-mixed H₂ and O₂. A single-step, global reaction mechanism is used to model the combustion of hydrogen with oxygen (2H₂+O₂->2H₂0). Additionally, the effects of an artificial viscosity model and noise filter are evaluated as a mechanism to stabilize the ignition discontinuity and to eliminate spurious oscillations. The performance and scaling characteristics of FURY are presented and detonation wave structure and propagation speeds are compared to experimental data for pre-mixed H₂/O₂ detonations.