DNS of turbulent heat transfer in a channel flow with constant temperature difference imposed between the parallel walls

摘要

Several direct numerical simulations (DNSs) have been performed for the turbulent heat transfer in a channel flow. In the present study, the effect of a difference in the thermal boundary condition is examined. DNS was carried out for constant wall temperature difference condition (Re{sub}τ = 180, 395) with Pr = 0.71 and Pr = 0.025 to obtain statistical mean temperature, temperature variance and their budget terms etc. The obtained results are compared with those of DNS for the uniform heat flux heating.