@Article{CiCP-23-4,
author = {},
title = {Liquid Fuel Evaporation under Supercritical Conditions},
journal = {Communications in Computational Physics},
year = {2018},
volume = {23},
number = {4},
pages = {1241--1262},
abstract = {<p style="text-align: justify;">Molecular dynamics simulations are performed to study the supercritical
mixing process of the n-dodecane/nitrogen binary system. Previous studies have
shown the existence of supercritical phenomenon under certain conditions in modern
propulsion systems such as diesel engines. However, the physical mechanisms and
internal driving forces of this phenomenon are still not well understood. In this paper,
we attempt to answer this question through simulating the diffusion and evaporation
of gaseous nitrogen and liquid phase n-dodecane. It addresses under what conditions
the supercritical transition phenomenon happens and what features the supercritical
evaporation process has. A unique configuration is constructed to mimic the evaporation
of an n-dodecane thin film in an open nitrogen environment under conditions
ranging from subcritical to supercritical. The detailed structure of the liquid-vapor interface
during the evaporating process is described and the evaporation rate and the
interface thickness are estimated, which show differences between subcritical and supercritical
evaporation. Results indicate that under relatively high pressure conditions,
the liquid surface transitions into supercritical state, and the liquid-vapor interface expands
significantly with vanishing surface tension, leading to a diffusion like mixing
process. It is shown that the supercritical evaporation would happen under conditions
that correspond to the in-cylinder conditions of a turbo-charged engine.</p>},
issn = {1991-7120},
doi = {https://doi.org/10.4208/cicp.OA-2016-0252},
url = {https://global-sci.com/article/80052/liquid-fuel-evaporation-under-supercritical-conditions}
}