Statistical State Dynamics of Jet–Wave Coexistence in Barotropic Beta-Plane Turbulence
نویسندگان
چکیده
منابع مشابه
A statistical state dynamics approach to wall turbulence.
This paper reviews results obtained using statistical state dynamics (SSD) that demonstrate the benefits of adopting this perspective for understanding turbulence in wall-bounded shear flows. The SSD approach used in this work employs a second-order closure that retains only the interaction between the streamwise mean flow and the streamwise mean perturbation covariance. This closure restricts ...
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A beta-plane approximation of the two-dimensional quasigeostrophic model describes a single layer ~barotropic! fluid subjected to a latitudinally varying Coriolis parameter or topography. Rhines ~1975! initiated the study of beta-plane turbulence. He predicted the inverse energy cascade into predominantly zonal modes, hence an array of eastward–westward jets, and estimated the jet number ~celeb...
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The initial boundary value problems associated with the inviscid barotropic potential vorticity equation in the b-plane and its viscous analogue are considered. It is shown that the solution velocity to the viscous equation converges to the inviscid solution in a C1 sense for finite times and that, under additional smoothness assumptions on the inviscid flow, this convergence can be extended to...
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In plane Couette flow, the incompressible fluid between two plane parallel walls is driven by the motion of those walls. The laminar solution, in which the streamwise velocity varies linearly in the wall-normal direction, is known to be linearly stable at all Reynolds numbers (Re). Yet, in both experiments and computations, turbulence is observed for Re & 360. In this article, we show that when...
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This paper describes a study of the self-sustaining process in wall turbulence. The study is based on a second order statistical state dynamics model of Couette flow in which the state variables are the streamwise mean flow (first cumulant) and perturbation covariance (second cumulant). This statistical state dynamics model is closed by either setting the third cumulant to zero or by replacing ...
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ژورنال
عنوان ژورنال: Journal of the Atmospheric Sciences
سال: 2016
ISSN: 0022-4928,1520-0469
DOI: 10.1175/jas-d-15-0288.1