Energetics of horizontal convection
Bishakhdatta Gayen, Ross W Griffiths, Graham O Hughes, Juan A Saenz
JOURNAL OF FLUID MECHANICS | CAMBRIDGE UNIV PRESS | Published : 2013
Three-dimensional direct numerical simulation of horizontal convection is reported for a large Rayleigh number, Ra ∼ O(1012), and boundary conditions that allow comparison with previous laboratory experiments. The convection is forced by heating over half of the horizontal base of a long channel and cooling over the other half of the base. The solutions are consistent with the experiments, including small-scale streamwise roll instability developing into a convectively mixed layer within the bottom thermal boundary layer, and a turbulent endwall plume. The mechanical energy budget is shown to be dominated by conversions of available potential energy to kinetic energy by buoyancy flux in the ..View full abstract
Awarded by Australian Research Council
Awarded by ARC
Numerical computations were conducted using the Australian National Computational Infrastructure, ANU. This work was supported by Australian Research Council grants DP1094542 and DP120102744. G.O.H. was supported by ARC Future Fellowship FT100100869.