DOI: 10.1615/TSFP3
DIRECT NUMERICAL SIMULATION OF TRANSITIONAL-TURBULENT FLOW WITH HEAT TRANSFER IN A CLOSED ROTOR-STATOR CAVITY
ABSTRAKT
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