Abstract
In contrast to the non-zonal, DES-like, hybrid approaches, in which a transition from RANS to LES relies upon a natural instability of separated shear layers in massively separated flows, the zonal RANS-LES (actually, RANS – Wall Modelled LES or RANS-WMLES) hybrids imply the presence of a sharp interface between the flow regions treated by RANS and LES. The location of this interface may be arbitrarily specified by the user based on their understanding of the flow physics, available computational resources or the objectives of the simulation, e.g., a need for unsteady flow characteristics.
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Shur, M. et al. (2018). Improved Embedded Approaches. In: Mockett, C., Haase, W., Schwamborn, D. (eds) Go4Hybrid: Grey Area Mitigation for Hybrid RANS-LES Methods. Notes on Numerical Fluid Mechanics and Multidisciplinary Design, vol 134. Springer, Cham. https://doi.org/10.1007/978-3-319-52995-0_3
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DOI: https://doi.org/10.1007/978-3-319-52995-0_3
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