Скачать или смотреть Under-Expanded H₂-Jet Mixing in Air

This video presents the simulation of an under-expanded hydrogen jet injected into an air plenum at a nozzle pressure ratio of 10.
The physical domain is discretized with a block-structured, curved, non-conforming hexahedral mesh with approximately 700,000 elements.
We computed the problem with a dynamic hp-adaptive discretization, where smooth regions are resolved
with a p-adaptive DG scheme with N ∈ [2, 4], while shocks and steep concentration gradients are stabilized by a finite volume (FV)
sub-cell method with N_FV = 7 sub-cells per direction. Aliasing-driven instabilities in under-resolved turbulence
are prevented through a split-form DG formulation. To allow for efficient parallelization, the computation employs a dynamic load-balancing scheme, that automatically measures element loads and distributes the computational resources accordingly.
The simulation is run on 16384 processors of a high performance cluster, requiring a total of 911k CPU hours.