Coupling Boltzmann and Navier-Stokes Equations by Friction
نویسندگان
چکیده
The aim of this paper is to introduce and validate a coupled Navier-Stokes Boltzmann approach for the calculation of hypersonic rareeed ows around manoeuver-ing vehicles. The proposed strategy uses locally a kinetic model in the boundary layer coupled through wall friction forces to a global Navier-Stokes solver. Diierent numerical experiments illustrate the potentialities of the method. Couplage des Equations de Boltzmann et de Navier-Stokes par frottement. R esum e : Le but de ce rapport est d'introduire et valider une technique de couplage des Equations de Navier-Stokes avec les Equations de Boltzmann aan de calculer les ecoule-ments hypersoniques autour d'engins manoeuvrant a haute altitude. La strat egie propos ee utilise localement un mod ele cin etique en couche limite, coupl e a un solveur global Navier-Stokes par le biais de conditions de frottement impos ees a la paroi. Dii erentes simulations num eriques illustrent les possibilit es de l'approche propos ee.
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