Print Email Facebook Twitter A zonal characteristic boundary condition for numerical simulations of aerodynamic sound Part of: ECCOMAS CFD 2006: Proceedings of the European Conference on Computational Fluid Dynamics· list the conference papers Title A zonal characteristic boundary condition for numerical simulations of aerodynamic sound Author Sandberg, R.D. Jones, L.E. Sandham, N.D. Date 2006-09-07 Abstract This paper presents a non-reflecting boundary condition that significantly reduces the spurious pressure oscillations that are produced when vortical structures in a compressible flow cross the computational farfield boundaries. The method is based on commonly used characteristic boundary conditions. Here, incoming characteristics are ramped to zero in a buffer region as opposed to merely setting them to zero at the boundary. One of the key features of the approach is that it is free of coefficients requiring calibration. The equivalence of two formulations of the zonal boundary condition is verified with a model problem. Direct numerical simulations of trailing edges at different Mach numbers are conducted to demonstrate the effectiveness of the novel approach. Subject CFDDNSaeroacousticcharacteristic boundary condition To reference this document use: http://resolver.tudelft.nl/uuid:b4a6f8bd-6629-4531-aa7c-3c7fca78fbf2 Part of collection Conference proceedings Document type conference paper Rights (c) 2006 Sandberg, R.D.; Jones, L.E.; Sandham, N.D. Files PDF Sandberg.pdf 616.35 KB Close viewer /islandora/object/uuid:b4a6f8bd-6629-4531-aa7c-3c7fca78fbf2/datastream/OBJ/view