Turbulent Mixing by Gases of Different Densities

Jet sharpening by turbulent mixing.

Jets or localized strong currents in planetary atmospheres, as well as in the Earth's oceans, are often associated with sharp potential-vorticity gradients owing to the inherent balance exhibited by these flows. Here, we explore and quantify jet sharpening in a simple idealized single-layer quasi-geostrophic model on a mid-latitude β-plane. The advantages of this idealization are that just two ...

Mixing Invariant Densities

| For many chaotic systems there appears to be a single asymptotic distribution describing the frequency with which almost all trajectories visit diierent regions of state space. Such a distribution is commonly called the \physical" invariant measure or \natural" invariant measure of the system. Consider the evolution of a cluster of initial conditions under the action of the system. This clust...

Effect of Merging Angle on Turbulent Mixing Layers

Turbulent mixing and beyond.

Turbulence is a supermixer. Turbulent mixing has immense consequences for physical phenomena spanning astrophysical to atomistic scales under both high- and low-energy-density conditions. It influences thermonuclear fusion in inertial and magnetic confinement systems; governs dynamics of supernovae, accretion disks and explosions; dominates stellar convection, planetary interiors and mantle-lit...

Turbulent mixing of stratified flows

A mathematical model for turbulent mixing of stratified, sheared flows is developed and explored. Two applications are emphasized, one to the dynamics of the ocean well–mixed layer, and another to the analysis of the stability of equilibrium profiles away from boundaries.