Controlling turbulent heat transport by manipulating coherent structures
Instantaneous flow fields (a, b) and time-averaged heat flux fields (c, d) in a canonical thermal turbulence system with rectangular geometry. By applying spatial confinement through decreasing the lateral sizes of the system, the domain-sized circulatory flow is replaced by more energetic thermal coherent structures (indicated by the red/blue structures). This manipulation in the coherent structures not only leads to significant change in the global heat transfer, but also alters the spatial distribution pattern of heat…
