Turbulence structure in thick layers of fluid
نویسندگان
چکیده
Measurements of spatial structure of turbulence in thick fluid layers driven electromagnetically at small scales are reported. It is shown that at modest Reynolds numbers the top sublayer behaves as quasi-2D and supports the inverse energy cascade regardless of the layer depth. The cascade survives even in the presence of strong 3D eddies developing in a layer whose depth exceeds half the forcing scale. In a bounded flow at low bottom dissipation, the initial development of the inverse cascade in the top sublayer, leads to the generation of a spectral condensate which destroys 3D eddies in the bulk flow and enforces its planarity.
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