Achieving heat transfer enhancement via manipulation of bulk flow structures in turbulent thermal convection

Abstract

Coherent structures in thermal turbulence are highly efficient in the global transport of heat. However, it is notoriously difficult to manipulate these structures due to the random motions of the turbulent background and the dissipative nature of turbulence. In this study we identify a new mechanism for achieving heat transfer enhancement in turbulent thermal convection, which is to promote both the plume coherency and flow strength via manipulation of the coherent structures in the bulk of the flow.