Zobrazeno 1 - 10
of 37
pro vyhledávání: '"Ziv Kizner"'
Publikováno v:
Journal of Fluid Mechanics. 875:225-253
We consider two-dimensional quasi-geostrophic annular flows around a circular island with a radial offshore bottom slope. Since the conical bottom topography causes a certain beta effect, by analogy with the conventional beta plane we term our model
Publikováno v:
Journal of Fluid Mechanics. 856:202-227
Instabilities of a two-dimensional quasigeostrophic circular flow around a rigid circular wall (island) with radial offshore bottom slope are studied analytically. The basic flow is composed of two concentric, uniform potential-vorticity (PV) rings w
Publikováno v:
Journal of Fluid Mechanics. 810:535-553
We investigate numerically the transitions and oscillatory regimes in two-layer quasigeostrophic hetons and tripoles composed of patches of uniform potential vorticity (PV). The contour-surgery algorithms are employed, in which either some symmetries
Publikováno v:
Journal of Fluid Mechanics, 730, 419-441. Cambridge University Press
Instabilities and long-term evolution of two-dimensional circular flows around a rigid circular cylinder (island) are studied analytically and numerically. For that we consider a base flow consisting of two concentric neighbouring rings of uniform bu
Publikováno v:
Journal of Fluid Mechanics. 712:327-353
Linear instabilities, both momentum-balanced and unbalanced, in several different $ \overline{u} (y)$ shear profiles are investigated in the rotating shallow water equations. The unbalanced instabilities are strongly ageostrophic and involve inertia
Publikováno v:
Journal of Fluid Mechanics. 708:397-417
A finite-core heton is a baroclinic $f$-plane modon of a special type: it is composed of two patches of uniform quasi-geostrophic potential vorticity (PV) residing in different layers of a two-layer rotating fluid. This paper focuses on numerical con
Publikováno v:
Israel Journal of Ecology & Evolution. 58:69-85
Morphological and physiological phenotypic plasticity of Stylophora pistillata in response to environmental changes was studied, with the objective of evaluating the impact of light and water flow as environmental factors. An in-situ artificial manip
Publikováno v:
Journal of Fluid Mechanics. 672:307-325
Using an iterative algorithm, a family of stationary two-dimensional vortical dipoles is constructed, including translational (symmetric and asymmetric about the translation axis) and orbital (i.e. moving in circles) dipoles. The patches of uniform v
Publikováno v:
Journal of Fluid Mechanics. 658:492-508
A theory of viscous evolution and selection of symmetric two-dimensional dipoles is suggested, based on a combination of numerical simulations and an asymptotic analysis, where the slow time scale associated with the vorticity diffusion due to viscos
Publikováno v:
Theoretical and Computational Fluid Dynamics, 24(1-4), 111-115. Springer
Barotropic f-plane dipolar vortices were generated in a rotating fluid and a comparison was made with the so-called supersmooth f-plane solution which-in contrast to the classical Lamb-Chaplygin solution-is marked by an elliptical separatrix and a do