Xiao, GW; Luo, KH; Ma, X; Shuai, SJ; (2017) Molecular Dynamics Simulations of the Evaporation Process of a Fuel Droplet Under Supercritical Environment. Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics , 38 (12) pp. 2745-2751.

Text Luo 2017 JET proof.pdf - Accepted Version Download (1MB)

Abstract

The evaporation process of an n-dodecane droplet surrounded by nitrogen ambient under supercritical pressures and sub- to super-critical temperatures is studied by molecular dynamics simulation. Results show that the evaporation process under high pressures depart considerably from the theoretical prediction of D2-law. Both environmental pressure and temperature have significant inuence on the evaporation rate, and elevated pressure can greatly increase the nitrogen solubility in the liquid phase and also the liquid-vapor interface thickness. It is found that under supercritical environmental conditions, the expanded interface may enter the continuum regime, leading to a diffusion dominated mixing process, rather than a conventional evaporation.

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