Mathematical Modeling of Near-Wall Flows of Two-Phase Mixture with Evaporating Droplets

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	Mathematical Modeling of Near-Wall Flows of Two-Phase Mixture with Evaporating Droplets
	Wang BY(王柏懿); Osiptov AN
刊名	Applied Mathematics and Mechanics (English Edition)
	2002
卷号	23 期号:6 页码:576-582
ISSN号	0253-4827
通讯作者	Wang, BY (reprint author), Chinese Acad Sci, Inst Mech, LMN, Beijing 100080, Peoples R China.
英文摘要	In the framework of the two-continuum approach, using the matched asymptotic expansion method, the equations of a laminar boundary layer in mist flows with evaporating droplets were derived and solved. The similarity criteria controlling the mist flows were determined. For the flow along a curvilinear surface, the forms of the boundary layer equations differ from the regimes of presence and absence of the droplet inertia deposition. The numerical results were presented for the vapor-droplet boundary layer in the neighborhood of a stagnation point of a hot blunt body. It is demonstrated that, due to evaporation, a droplet-free region develops near the wall inside the boundary layer. On the upper edge of this region, the droplet radius tends to zero and the droplet number density becomes much higher than that in the free stream. The combined effect of the droplet evaporation and accumulation results in a significant enhancement of the heat transfer on the surface even for small mass concentration of the droplets in the free stream. 在双连续介质理论框架下,采用匹配渐进展开方法导出并求解了具有蒸发液滴的汽雾流中层流边界层方程,给出了控制汽雾流的相似判据。对于沿曲面的流动,边界层方程的形式取决于是否存在液滴的惯性沉积。给出了热钝体验点附近蒸汽。液滴边界层的数值计算结果。它们表明：由于蒸发,在边界层内近壁处形成了一个无液滴区域；在该区上边界处,液滴半径趋于零而液滴数密度急剧增高。液滴蒸发及聚集的联合效应造成了表面热流的显著增加,甚至在自由来流中液滴质量浓度很低时此效应依然存在。
学科主题	力学
类目[WOS]	Mathematics, Applied ; Mechanics
研究领域[WOS]	Mathematics ; Mechanics
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000177574500005
公开日期	2007-06-15 ; 2007-12-05 ; 2009-06-23
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/16554]
专题	力学研究所_力学所知识产出(1956-2008)
推荐引用方式 GB/T 7714	Wang BY,Osiptov AN. Mathematical Modeling of Near-Wall Flows of Two-Phase Mixture with Evaporating Droplets[J]. Applied Mathematics and Mechanics (English Edition),2002,23(6):576-582.
APA	王柏懿,&Osiptov AN.(2002).Mathematical Modeling of Near-Wall Flows of Two-Phase Mixture with Evaporating Droplets.Applied Mathematics and Mechanics (English Edition),23(6),576-582.
MLA	王柏懿,et al."Mathematical Modeling of Near-Wall Flows of Two-Phase Mixture with Evaporating Droplets".Applied Mathematics and Mechanics (English Edition) 23.6(2002):576-582.