Finite-size evaporating droplets in weakly compressible homogeneous shear turbulence

Vapor mixing in turbulent vaporizing flows

“…The rst joint PDF (top left of Figure17) represents the initial stages of the mixing process, and a wide dispersion of ω over a large range of mean curvatures is observed. Additionally, ω dispersion is related to the variations of local vapor concentration close to the interface, the interface deformations, and the diversity of liquid and gas structure characteristic lengths.Similar observations were made byScapin et al (2021) for dispersed twophase ow simulations in homogeneous shear turbulence. In their simulations, the liquid/gas interface and internal ow of the liquid droplets are resolved, and the evaporation rate depends on the vapor mass fraction and the temperature elds Scapin et al (2021).…”

“…Recently, similar observations have been made for a single evaporating droplet in a homogeneous and isotropic turbulent environment (Dodd et al (2021)) and for dispersed evaporating droplets in a homogeneous turbulent shear environment (Scapin et al (2021)). In Scapin et al (2021), the authors show variations in the evaporation rate due to small deformations caused by the turbulent velocity eld. In addition, their results also reveal an increase in the evaporation rate due to the interaction of the vapor mass fraction with the turbulent veloc-ity eld.…”

“…To implement one of these methods to study the scalar mixing and vaporization processes in a turbulent and conned environment, the eect of compressibility must be considered in order to conserve the initial total mass. A step toward this kind of simulation was taken by Scapin et al (2021) and Dodd et al (2021), who used a low-mach formulation of the Navier-stokes equations. Consequently, the gas density is a function of pressure and temperature in their simulations.…”