ß-plane turbulence in a basin with no-slip boundaries

W. Kramer, M.G. van Buren, H.J.H. Clercx, G.J.F. Heijst, van

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10 Citations (Scopus)
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On a domain enclosed by no-slip boundaries, two-dimensional, geostrophic flows have been studied by numerical simulations of the Navier-Stokes equation with the b-plane approxn. at intermediate Reynolds nos. and a range of values for b. The b effect causes a refinement of the flow structures, and the presence of basin modes has been revealed by means of frequency spectra. The presence and apparent stability of basin modes on a domain enclosed by no-slip boundaries is a rather surprising observation, because these modes are solns. of the inviscid flow equations on a bounded domain (with free-slip boundaries). To understand the persistence of these basin modes, the viscous boundary layers near the no-slip walls have been investigated. The mean flow in forced simulations shows a zonal band structure, much unlike the regular Fofonoff-like soln. obsd. when free-slip boundary conditions are used. [on SciFinder (R)]
Original languageEnglish
Pages (from-to)026603-1/11
JournalPhysics of Fluids
Issue number2
Publication statusPublished - 2006


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