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SUMMARY:Out-of-equilibrium fluxes shape the self-organization of turbulenc
 e with local interactions - Anna Frishman (Technion - Israel Institute of 
 Technology)
DTSTART:20240409T103000Z
DTEND:20240409T113000Z
UID:TALK215383@talks.cam.ac.uk
DESCRIPTION:The self-organization of turbulence is a remarkable property o
 f flows with two sign-definite conserved quantities. When such flows are f
 orced at small scales\, a coherent flow called a condensate emerges\, and 
 is sustained by turbulence. The organizational principle for the condensat
 e is that it should occupy the entire domain\, respect its symmetries and 
 be independent of small-scale details. One class of flows where condensati
 on occurs is a rapidly rotating shallow fluid layer under the influence of
  gravity. This family of two-dimensional flows is characterized by a singl
 e parameter\, the Rossby deformation radius R\, which determines the range
  of influence of a flow perturbation. When R is much larger than the domai
 n size\, the flow reduces to two-dimensional Navier-Stokes. In the opposit
 e limit of vanishing R\, a regime termed LQG\, interactions between fluid 
 elements become strictly local. We uncover an unexpected organizational pr
 inciple in the latter: the condensate area is determined by the ratio betw
 een the forcing scale and the UV cutoff. In particular\, the large-scale f
 low can take different configurations depending on this ratio\, including 
 regions of bi-stability of configurations and spontaneous symmetry breakin
 g in the thermodynamic limit (increasing system size). We explain how this
  behavior arises from the spatial distribution of fluxes of the conserved 
 quantities in the system.\n&nbsp\;\n&nbsp\;
LOCATION:Seminar Room 2\, Newton Institute
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