Abstract
A method based on linear forcing is developed to generate realistic turbulent fluctuations at the inlet of a computational domain. The method uses a precursor computation of convected forced isotropic turbulence and variables are extracted from a plane to be imposed at the inlet of the main simulation. In the precursor computation, the turbulent fluctuations are generated and sustained using a synthetic generator and a linear forcing which have been adapted in order to allow the specification of the intensity and length scale. The method is then applied to the analysis of a conical vortex in interaction with a wall subjected to external turbulence using Improved Delayed Detached Eddy Simulation. Good agreement with experimental data is achieved both concerning the decay of the turbulent fluctuations in the upstream region and concerning the sensitivity of the vortex to the Free Stream Turbulence.
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