Abstract
A correct description of turbulent mixing is particularly taxing on our understanding of turbulence; such a description relies on an account of the dynamics spanning the full spectrum of scales. Specifically, to describe the entrainment stage that is responsible for the engulfment of large pockets of irrotational fluid species into the turbulent flow region (Brown & Roshko 1974), the large-scale flow structures need to be correctly described. Secondly, to describe the subsequent kinematic stirring process responsible for the large interfacial surface generation between the mixing species, the intermediate range of scales must be correctly accounted for. These are below the largest in the flow in size, but above the smallest affected by viscosity and molecular diffusivity. Finally, the dynamics at the smallest scales must be captured to describe the molecular mixing process itself. These three phases of turbulent mixing...
