Variable Density Fluid Turbulence: Preamble

Abstract

Turbulent flows of variable density fluids are widely present in various domains of human activity and natural environment. In actual fact, density changes arise in low-speed flows and high-speed motions as well. Aeronautics is probably one of the most commonly quoted situations, since compressible subsonic, transonic, and supersonic motions are present in many applications, such as high-speed aircraft flight or supersonic combustion ramjet engines, for instance. However, as far as industrial applications involving fluids motions are concerned, variable density fluid flows are part of chemical engineering, thermal engineering, energetic, etc.