The linear stability of a double-diffusively stratified, inflectional shear flow is investigated. Double-diffusive stratification has little effect on shear instability except when the density ratio R[subscript]ρ is close to unity. Double-diffusive instabilities have significant growth rates and can represent the fastest-growing mode even in the presence of inflectionally unstable shear...
Direct numerical simulations (DNS) of a shear layer with salt-fingering-favorable stratification have been
performed for different Richardson numbers Ri and density ratios R[subscript]p. In the absence of shear (Ri = oo), the
primary instability is square planform salt fingering, alternating cells of rising and sinking fluid. In the presence
Instability and turbulence in sheared, salt-fingering favorable stratification are studied
using three-dimensional direct numerical simulations (DNS). Salt-fingering favorable
stratification is gravitationally stable, because the unstable vertical gradient of salinity
is stabilized by temperature (warm, salty over cool, fresh water-masses). Salt-fingering
instability can occur at the interface of these different water-masses....