What is it about?
The model can be applied to identify and parameterize vortices in any two-dimensional flow. The study focuses on a kind of turbulent heat convection (RB convection) flow. The model identified the corner roll in the convection cell and obtained the size and strength of the corner roll, and the relation between the corner roll and the physical condition (i.e. the Rayleigh number).
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Why is it important?
Due to the complexity of eddies and vortices in turbulence, it is always hard to identify and parameterize them in a universal way. The study present a tool, based on homotopy ananlysis, to identify vortices in two-dimensional turbulent flow. This model may be employed to any flow to extract vortices. Our findings show that the corner roll plays a role in determining the global heat transport in RB convection. Thus, the similarity model is more flexible than most previous methods.
Read the Original
This page is a summary of: Letter: Similarity model for corner roll in turbulent Rayleigh-Bénard convection, Physics of Fluids, November 2018, American Institute of Physics, DOI: 10.1063/1.5054647.
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