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Consistent boundary conditions for integrated RANS/LES simulations: Les inflow conditions

conference contribution
posted on 2003-12-01, 00:00 authored by J U Schlüter
The increasing complexity of flow problems computed with numerical methods calls for the usage of hybrid approaches of Reynolds-averaged Navier Stokes (RANS) flow solvers and Large eddy Simulations (LES). Many flow solvers are developed using either RANS or LES. One possibility to combine these approaches is to let these separate flow solvers run simultaneously and exchange information at the interface. Considering a RANS domain upstream and an LES domain downstream, one of the arising problems is how to define transient LES inflow boundary conditions from the statistical RANS data at the outlet of the RANS domain. In this paper, an already existing approach of creating a data base from an auxiliary LES computation of a turbulent pipe flow prior to the actual LES computation is adapted for use in integrated RANS/LES computations. It is then furthermore refined in order to transmit amplitude and phase of a transient perturbation over the interface.

History

Event

16th AIAA Computational Fluid Dynamics Conference

Publisher

American Institute of Aeronautics and Astronautics

Location

Orlando, Fla.

Place of publication

Reston, Va.

Start date

2003-06-23

End date

2003-06-26

ISBN-13

9781624100864

Publication classification

EN.1 Other conference paper

Title of proceedings

16th AIAA Computational Fluid Dynamics Conference

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