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DIRECT NUMERICAL SIMULATION OF TRANSITIONAL-TURBULENT FLOW WITH HEAT TRANSFER IN A CLOSED ROTOR-STATOR CAVITY

Eric Serre
Aix-Marseille Universite, CNRS, Ecole Centrale Marseille, Laboratoire M2P2, Marseille, France

Patrick Bontoux
Département de Modélisation Numérique, Institut de Recherche sur les Phénomènes Hors Equilibre, Unité Mixte de Recherche CNRS 6594, 1, rue Honnorat, 13003 Marseille, France

Brian E. Launder
School of Mechanical, Aerospace & Civil Engineering, The University of Manchester, PO Box 88, Manchester M60 1QD, UK

Resumo

In this paper, a non-isothermal flow confined between a rotating and a stationary disc is investigated using direct numerical simulation. Besides its fundamental importance as a three-dimensional prototype flow, such flows frequently arise in many industrial devices, especially in turbomachinary applications. The direct numerical simulation is performed by integrating the time-dependent Navier-Stokes equations with a three-dimensional spectral method. The effects of thermal convection have been examined for a transitional turbulent flow at Re(= ΩR12/ν)=110000 in an annular cavity of aspect ratio L(=ΔR/H)=2.35. These DNS results provide accurate, instantaneous quantities which may be helpful in understanding the physics of turbulent flow and heat transfer in a rotating disc cavity. Moreover, the averaged results provide target data for workers employing RANS schemes