Pedram Hassanzadeh, Philip S. Marcus and Patrice Le Gal Journal of Fluid Mechanics / Volume 706 / September 2012, pp 46 ­ 57 DOI: 10.1017/jfm.2012.180, Published online: 24 May 2012 Link to this article: http://journals.cambridge.org/abstract_S0022112012001802 How to cite this article: Pedram Hassanzadeh, Philip S. Marcus and Patrice Le Gal (2012). The universal aspect ratio of vortices in rota...

In the context of fluid flows, the coupled Ostrovsky equations arise when two distinct linear long wave modes have nearly coincident phase speeds in the presence of background rotation. In this paper, nonlinear waves in a stratified fluid in the presence of shear flow are investigated both analytically, using techniques from asymptotic perturbation theory, and through numerical simulations. The...

In this paper we develop a simple model for the steady state of two-dimensional self-gravitating incompressible gas which is based on the hydrodynamic equations for stratified fluid. These equations are then reduced to a system of two equations for the mass density and the gravitational field. Analytical analysis and numerical solutions of these equations under different modeling assumptions ͑wi...

Wave disturbances of a stratified gas are studied. The description is built on a basis of the Bhatnagar – Gross – Krook (BGK) kinetic equation which is reduced down the level of fluid mechanics. The double momenta set is introduced inside a scheme of iterations of the equations operators, dividing the velocity space along and opposite gravity field direction. At both half-spaces the local equil...