Summary
Large-eddy simulation (LES) has been applied to turbulent boundary layer flow over a hemisphere with a rough surface (at Re D = 150000). The shape of the surface-mounted hemisphere is blocked-out within a cartesian non-equidistant grid. The time-dependent inflow condition is provided from a separate LES of a boundary layer developing behind a barrier fence and a set of vorticity generators. Two results from LES with different grid resolution are compared with experimental data from a corresponding wind tunnel experiment. In addition, the data sets from LES have been analysed using proper orthogonal decomposition (POD). From this analysis it can be concluded that the first three fluctuating eigenmodes (representing about 24 % of the turbulent kinetic energy) can be related to the major events in the separated flow behind the flow obstacle.
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© 1996 Friedr. Vieweg & Sohn Verlagsgesellschaft mbH, Braunschweig/Wiesbaden
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Manhart, M., Wengle, H. (1996). Large-Eddy Simulation and Eigenmode Decomposition of Turbulent Boundary Layer Flow over a Hemisphere. In: Hirschel, E.H. (eds) Flow Simulation with High-Performance Computers II. Notes on Numerical Fluid Mechanics (NNFM), vol 48. Vieweg+Teubner Verlag. https://doi.org/10.1007/978-3-322-89849-4_20
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DOI: https://doi.org/10.1007/978-3-322-89849-4_20
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