A High-Order FDF Large Eddy Simulator of Complex Flows

ORAL

Abstract

Honoring Ted O'Brien. The flow solvers in most previous LES-FDF are based either on high-order discretization schemes in simple flows, or low-order (finite-volume) methods in complex flows. In this work, we develop a new computational methodology which allows LES of complex flows via the use of a high-order spectral-hp element scheme. The high order accuracy of the spectral discretization and the versatility of the finite element domain decomposition, facilitate high-fidelity simulation of flows within complex geometries. This CFD solver is combined with a Lagrangian Monte Carlo scheme for LES of a bluff-body reacting flow via the FDF subgrid scale closure [1]. Demonstrations are made of the consistency and the overall superior performance of this high order hybrid scheme. [1] Gao, F. and O'Brien, E. E., ``A Large-Eddy Simulation Scheme for Turbulent Reacting Flows,'' Phys. Fluids A, vol. 5(6), pp. 1282-1284 (1993).

–

Authors

  • Shervin Sammak

    • Center for Research Computing, University of Pittsburgh

  • Aidyn Aitzhan

    • Department of Mechanical Engineering and Materials Science, University of Pittsburgh

  • Arash Nouri

    • Department of Mechanical Engineering and Materials Science, University of Pittsburgh

  • Peyman Givi

    • Department of Mechanical Engineering and Materials Science, University of Pittsburgh