U.S.-France Cooperative Research: Characterization of Surfactant Mass Transfer Kinetics and their Impact on Confined Multi-Phase Flows

这个为期三年的奖项支持美国-法国合作研究 约翰霍普金斯大学的凯瑟琳·斯蒂贝 Dominique Langevin of the Ecole Normale哥伦比亚 （巴黎）和法国贡比涅大学的多米尼克·巴尔特-比厄 技术.研究人员将研究 表面活性剂吸附对流体颗粒运动的影响 新应用的背景包括：（1）泡沫在 多孔介质;（2）气泡和液滴的热毛细迁移 在微重力流体处理中;和（3）动力学速率常数 用于表面活性剂分子的吸附和解吸。 表面活性剂吸附及其影响可能是重要的， 提高石油采收率 基本理论是， 泡沫可用于控制驱替流体的流动性 从而改善了对三次采油控制 从岩石孔隙中去除石油。美国调查人员有广泛的 界面的理论和实验经验 力学，特别侧重于表面活性剂相关 界面现象 这是法国人的补充 研究人员在软物质物理学（表面活性剂和 聚合物）和两相流。 该项目将受益于 巴黎小组独特的实验装置和光散射 分析界面毛细作用的技术。 一 气泡和表面活性剂吸附的相关实验将 由贡比涅的小组进行。

This three-year award supports U.S.-France cooperative research in chemical systems involving Kathleen Stebe of Johns Hopkins University, Dominique Langevin of the Ecole Normale Superieure (Paris) and Dominique Barthes-Biesel of Compiegne University of Technology. The investigators will study the effects of surfactant adsorption on fluid particle motions within the context of new applications including: (1) the flow of foams in porous media; (2) thermocapillary migration of bubbles and drops in microgravity fluids processing; and (3) kinetic rate constants for adsorption and desorption of surfactant molecules. Surfactant adsorption and its effects may be important for enhanced oil recovery. The underlying theory is that detergent foams could be used to control the mobility of a displacing fluid in tertiary oil recovery and thereby improve its control for removing oil from rock pores. The U.S. investigator has extensive experience in both theory and experiments in interfacial mechanics, specifically focusing on surfactant related interfacial phenomena. This is complemented by the French investigators' expertise in soft matter physics (surfactants and polymers) and two phase flows. The project will benefit from the Paris group's unique experimental apparatus and light scattering technique for analyzing capillary action at interfaces. A related experiment on gas bubbles and surfactant adsorption will be conducted by the group in Compiegne.