LES-simulation of heat transfer in a turbulent pipe flow with lead coolant at different Reynolds numbers

In this paper, the numerical simulation of turbulent heat transfer in a circular pipe was performed in a wide range of Reynolds numbers using nonparametric MILES-method CABARET on grids with an incomplete resolution of the turbulence spectrum, as well as with the use of the STAR-CCM+ code in a LES-approximation. The calculation results was compared with the DNS calculations by other authors found in literature, as well as with the RANS-calculations performed in the STAR-CCM+ code. The simulation showed a satisfactory accuracy in determining average, rms and integral characteristics of the flow, and revealed drawbacks in the existing model relations describing the local properties of turbulence. The authors have proposed a wall-bounded thermal function, which might be implement in the RANS-approximations.