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physics.flu-dyn2026
A note on the lower boundary condition for Ekman flows
Christian Puntini, Luigi Roberti
We show that the assumption of a stress-free boundary condition at a finite intermediate depth, namely, at the bottom of the Ekman layer, in the analysis of wind-driven ocean flows…
physics.ao-ph2026
On the instability of some upward propagating, exact, nonlinear mountain waves
Christian Puntini
Using the short-wavelength instability method, we investigate the linear instability of an exact solution describing upward-propagating mountain waves, derived in A.~Constantin, \e…
physics.flu-dyn2026
On large-scale wind-drift ocean currents: An asymptotic approach in spherical coordinates
Christian Puntini, Luigi Roberti, Eduard Stefanescu
Starting from the Navier--Stokes equations in rotating spherical coordinates with depth-varying density and eddy viscosity, we derive an asymptotic model describing non-equatorial…