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- W201546688 abstract "Unstructured methods are now more common in industry due to the ease with which grids for complex geometries can be generated. Massively separated flows are of interest to industry and traditional RANS models cannot provide adequate modelling for these cases. Hybrid RANS-LES methods have been shown to provide superior performance for massively separated flows and it is of interest to compare the performance of compressible and incompressible unstructured methods within a hybrid RANS-LES framework. . A modified JST scheme is proposed for the TAU code which reduces the non-physical damping of turbulence at higher wave numbers and allows full resolution of the resolved turbulent field on a hexahedral mesh. The influence of grid anisotropy is also examined. It is seen that the local grid anisotropy influences the dissipation at high wave numbers and suggests that isotropic mesh elements should be favoured within LES regions. A comparison is then made between TAU solutions obtained using DDES and LES for a cylinder at Re=3900. Differences between DES and LES solutions obtained on a hexahedral mesh (structured) and a tetrahedral mesh (unstructured) for TAU are compared against THETA LES solutions for the unstructured mesh." @default.
- W201546688 created "2016-06-24" @default.
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- W201546688 date "2010-01-01" @default.
- W201546688 modified "2023-09-23" @default.
- W201546688 title "Comparison of Hybrid RANS-LES Calculations within the Framework of Compressible and Incompressible Unstructured Solvers" @default.
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- W201546688 doi "https://doi.org/10.1007/978-3-642-14168-3_28" @default.
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