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Generation of turbulent inflow data for spatially-developing boundary layer simulations. (English) Zbl 0936.76026
The authors describe a method for generating three-dimensional, time-dependent turbulent inflow data for simulations of complex spatially developing boundary layers. The approach is to extract instantaneous planes of velocity data from an auxiliary simulation of a zero pressure gradient boundary layer. The auxiliary simulation is also spatially developing, but generates its own inflow conditions through a sequence of operations where the velocity field at a downstream station is rescaled and re-introduced at the inlet. This procedure is essentially a variant of the Spalart method, optimized so that an existing inflow-outflow code can be converted to an inflow-generation device through the addition of one simple subroutine. The proposed method is shown to produce a realistic turbulent boundary layer which yields statistics that are in good agreement with both experimental data and results from direct simulations.

MSC:
76F65 Direct numerical and large eddy simulation of turbulence
76F40 Turbulent boundary layers
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