中国科学院大学学报2024，Vol.41Issue(3)：289-297,9.DOI:10.7523/j.ucas.2023.063
Marangoni流动对液滴撞击过热液池影响的数值模拟
Numerical simulation of Marangoni flow on droplet impingement on a superheated pool
摘要
Abstract
We numerically investigate the dynamic behaviors of a droplet impacting onto the non-volatile superheated liquid pool,and focuse on the influence of the Marangoni effect resulted from the inhomogeneous temperature distribution at the surface of liquid pool.Particularly,the time evolution of the flow field and the temperature field inside the pool during and after the impacting are studied.We find that the pool surface,made of oil,is cooled quickly as the ethanol droplet approaches,and a large temperature gradient is produced along the radial direction.Correspondingly,the Marangoni force directs radially inwards to resist the radial outward vapor stress,and a"jet"like structure is formed at the position where the vapor layer becomes thinnest.As the time advances,the Marangoni force becomes dominant and the"jet"is pushed radially inwards until the rear of the droplet and form the downward plume flow.In addition,as the viscosity of the liquid pool increases,the flow induced by the vapor stress is suppressed which further reduce the heat exchange efficiency near the interface.关键词
莱顿弗罗斯特/马兰戈尼效应/液滴撞击液池/气-液相变Key words
Leidenfrost/Marangoni effect/droplet impacting liquid pool/liquid-gas phase change分类
数理科学引用本文复制引用
赵烁,张杰,倪明玖..Marangoni流动对液滴撞击过热液池影响的数值模拟[J].中国科学院大学学报,2024,41(3):289-297,9.基金项目
国家自然科学基金(51636009,11872296,U1732276)资助 （51636009,11872296,U1732276）
