Lagrangian (Phase) Structures in an Incompressible Fluid

• Published in: Izvestiya. Atmospheric and oceanic physics Vol. 61; no. 4; pp. 405 - 409
• Main Author: Yakushkin, I. G.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01.08.2025; Springer Nature B.V
• Subjects: Asymptotic properties; Baroclinic flow; Barotropic flow; Barotropic mode; Climatology; Earth and Environmental Science; Earth Sciences; Equilibrium flow; Fluid flow; Geometrical optics; Geophysics/Geodesy; Incompressible flow; Incompressible fluids; Optics; Poisson equation; Vorticity; structures; vorticity; Lagrangian invariants

This paper considers a geometric approach to describing structures in barotropic flows of an incompressible fluid. This type of description has an analogy in geometric optics. The evolution of equilibrium flows is considered, in which the trajectories of Lagrangian invariants, expressed through the...