摘要
可溶性活性剂液滴覆展过程在工业和医学领域应用广泛,深入研究其动力学机理和输运特性具有重要的理论和应用价值。在固体壁面和气-液界面热效应作用下,通过建立可溶性活性剂液滴在预置液膜上覆展过程的理论模型,推导出包括液滴厚度、液滴表面单分子浓度和活性剂溶液内部单分子浓度的二维非线性三方程演化模型。与非溶性活性剂液滴覆展模型相比,不仅增加了溶液内部单分子浓度方程,并且液滴表面单分子浓度方程增加了与控制液滴表面和溶液内部单分子传递有关的吸附通量项,为深入认识可溶性液滴覆展的演化特性奠定了理论基础。
The droplet spreading of .soluble surfactant appears across a wide range of contexts, spanning engineering and medicine, and it is of importance to investigate the dynamics and transport characteristics in theory and in practice. Under the thermal effect at the solid substrate or air- liquid interface, the theoretical model of soluble surfactant spreading on a pre - existing thin liquid layer is formulated arid the three two - dimensional nonlinear evolution equations are derived for the film thickness and surfactant concentration at the interface and in the bulk as monomers. Compared with the spreading of insoluble surfactant, the present model supplements the equation of the bulk monomer concentration and considers the sorptive flux governing the exchange of monomer species between the surface and bulk in surface monomer coneentration equation. The present evolution equations provide a theoretical method for better understanding for soluble surfactant spreading.
出处
《华北电力大学学报（自然科学版）》
CAS
北大核心
2009年第2期58-63,共6页
Journal of North China Electric Power University：Natural Science Edition
关键词
可溶性活性剂
液滴
热效应
覆展历程
演化方程
soluble surfactant
droplet
thermal effect
spreading
evolution equation
