Pressure-Strain Rate Events in Homogeneous Turbulent Shear Flow

Abstract

A detailed study of the intercomponent energy transfer process by the pressure-strain-rate tensor in homogeneous turbulent shear flow is presented. The work continues a program of enquiry, initiated by Brasseur & Lee [1], into the kinematic structure and dynamic processes associated with local, random events underlying statistical quantities modeled in second-order closures. Event refers to a local concentration of the quantity in an instantaneous turbulent field. The aim is to describe classes of local events with similar characteristics,their interrelationships, and their relative kinematic and dynamic significance. Of particular interest is the structure and overall contribution of the most powerful events relative to the underlying low-level turbulent field.