A molecular dynamics study of evaporation mode transition of hydrocarbon fuels under supercritical conditions

The mode transition of evaporation for single- and multi-component hydrocarbon fuels is investigated at the molecular level. This study scrutinizes first subcritical supercritical n-hexadecane droplets liquid films by dynamics (MD) simulations. regime map obtained. Then a three-component droplet six-component studied. A critical dimensionless number τ0.9P 0.5 based on average displacement increment (ADI) fuel atoms used to identify with any type components. It found that in diffusion evaporation, entropy becomes dominant factor fuels, disorder molecules increases significantly compared classic mode. Compared case quiescent droplet, increasing relative velocity between ambient gas, easier, although this non-linear process. Fuel different initial sizes are understand size effect. In addition, same temperature pressure, smaller normalized specific heat transfer surface area is, easier is. correlation was proposed compare possibility fuels.