Advances in High-Fidelity Multi-Physics Simulation Techniques

摘要

Efforts performed under this task to evolve a high-fidelity methodology for multi-physics applications in all speed regimes are summarized. Among the disciplines considered are fluid dynamics (turbulence, acoustics), electromagnetics, magnetogasdynamics, aero-structural interactions and thermo- chemical nonequilibrium. For high-order accuracy, a compact-difference based method is developed, supplemented by a filtering procedure to guarantee numerical stability in the presence of boundary truncation, stretching and non- linearity. The filter is also shown to be suitable for sub-grid closure within the high-order no-model large-eddy simulation. Further, boundary treatments for domain-decomposition techniques have also been developed. For high-temperature kinetics, accuracy is enforced through development and validation of master- equation and extended Navier-Stokes approaches, which facilitate accounting of detailed energy transfers between vibrational, rotational and translational modes, and their impact on dissociation.