Manipulation of coherent structures in turbulent convection via spatial confinement (IMAGE)
Caption
This figure shows 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 in the figure). 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 flux greatly.
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