当前位置: X-MOL 学术Langmuir › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Field-Assisted Contact Line Motion in Thin Films
Langmuir ( IF 3.9 ) Pub Date : 2018-04-17 00:00:00 , DOI: 10.1021/acs.langmuir.7b04322
Udita Uday Ghosh 1 , Sunando DasGupta 1
Affiliation  

The balance of intermolecular and surface forces plays a critical role in the transport phenomena near the contact line region of an extended meniscus in several technologically important processes. Externally applied fields can alter the equilibrium and stability of the meniscus with concomitant effects on its shape and spreading characteristics and may even lead to an oscillation. This feature article provides a detailed account of the present and past efforts in exploring the behavior of curved thin liquid films subjected to mild thermal perturbations, heat input, and electrical and magnetic fields for pure as well as colloidal suspensions, including the effects of particle charge and polarity. The shape-dependent intermolecular force field has been evaluated in situ by a nonobtrusive optical technique utilizing the interference phenomena and subsequent image processing. The critical role of disjoining pressure is identified along with the determination of the Hamaker constant. The spatial and temporal variations of the capillary forces are evaluated for the advancing and receding menisci. The Maxwell-stress-induced enhanced spreading during electrowetting, at relatively low voltages, and that due to the application of a magnetic field are discussed with respect to their distinctly different characteristics and application potentials. The use of the augmented Young–Laplace equation elicited additional insights into the fundamental physics for flow in ultrathin liquid films.

中文翻译:

薄膜中的场辅助接触线运动

分子间作用力和表面力的平衡在一些重要的技术过程中,在延长弯月面的接触线区域附近的传输现象中起着至关重要的作用。外部施加的磁场会改变弯月面的平衡和稳定性,并对其形状和扩展特性产生影响,甚至可能导致振荡。这篇专题文章详细介绍了目前和过去在探索弯曲薄膜液体的行为方面所做的努力,这些薄膜受到温和的热扰动,热输入以及纯和胶体悬浮液的电场和磁场的影响,包括颗粒电荷的影响和极性。通过非干涉光学技术,利用干涉现象和随后的图像处理,就地评估了与形状有关的分子间力场。分离压力的关键作用与Hamaker常数的确定一起被确定。评估毛细作用力的时空变化,以评估半月板的前进和后退。关于麦克斯韦应力在电润湿过程中在相对较低的电压下引起的扩展扩展,以及由于磁场的施加而引起的扩展扩展,就其明显不同的特性和应用潜力进行了讨论。增强的Young-Laplace方程的使用引起了超薄液膜流动的基本物理学的更多见解。分离压力的关键作用与Hamaker常数的确定一起被确定。评估毛细作用力的时空变化,以评估半月板的前进和后退。关于麦克斯韦应力在电润湿过程中在相对较低的电压下引起的扩展扩展,以及由于磁场的施加而引起的扩展扩展,就其明显不同的特性和应用潜力进行了讨论。增强的Young-Laplace方程的使用引起了超薄液膜流动的基本物理学的更多见解。分离压力的关键作用与Hamaker常数的确定一起被确定。评估毛细作用力的时空变化,以评估半月板的前进和后退。关于麦克斯韦应力在电润湿过程中在相对较低的电压下引起的扩展扩展,以及由于磁场的施加而引起的扩展扩展,就其明显不同的特性和应用潜力进行了讨论。增强的Young-Laplace方程的使用引起了超薄液膜流动的基本物理学的更多见解。关于麦克斯韦应力在电润湿过程中在相对较低的电压下引起的扩展扩展,以及由于磁场的施加而引起的扩展,就其明显不同的特性和应用潜力进行了讨论。增强的Young-Laplace方程的使用引起了超薄液膜流动的基本物理学的更多见解。关于麦克斯韦应力在电润湿过程中在相对较低的电压下引起的扩展扩展,以及由于磁场的施加而引起的扩展扩展,就其明显不同的特性和应用潜力进行了讨论。增强的Young-Laplace方程的使用引起了超薄液膜流动的基本物理学的更多见解。
更新日期:2018-04-17
down
wechat
bug