Heat transfer in rough-wall turbulent thermal convection in the ultimate regime
Michael MacDonald, Nicholas Hutchins, Detlef Lohse, Daniel Chung
Physical Review Fluids | American Physical Society | Published : 2019
Heat and momentum transfer in wall-bounded turbulent flow, coupled with the effects of wall roughness, is one of the outstanding questions in turbulence research. In the standard Rayleigh-Bénard problem for natural thermal convection, it is notoriously difficult to reach the so-called ultimate regime in which the near-wall boundary layers are turbulent. Following the analyses proposed by Kraichnan [Phys. Fluids 5, 1374 (1962)] and Grossmann and Lohse [Phys. Fluids 23, 045108 (2011)], we instead utilize recent direct numerical simulations of forced convection over a rough wall in a minimal channel [MacDonald et al., J. Fluid Mech. 861, 138 (2019)] to directly study these turbulent boundary la..View full abstract
Related Projects (1)
Awarded by Australian Research Council
The authors would like to gratefully acknowledge the financial support of the Australian Research Council through a Discovery Project (No. DP170102595).