Dynamics of Surfactant - Influenced Gas/Liquid Interfaces

表面活性剂动力学 - 影响气/液界面

• 批准号: 9803478
• 负责人: Amir Hirsa
• 金额: $ 20万
• 依托单位: Rensselaer Polytechnic Institute
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-04-15 至 2002-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9803478&HistoricalAwards=false
• 关键词: Dynamics; Surfactant; Influenced; Gas; Liquid

Abstract Proposal Number: CTS 9803478, CTS 9803683 Principal Investigator: Hirsa/Lopez This is a grant to study the intrinsic properties of surfactant-influenced gas/liquid interfaces. The program will capitalize on newly developed non-invasive optical techniques for surface chemistry and interfacial hydrodynamics. These properties will be measured directly and incorporated into the governing equations that are derived from first principles without the need for phenomenological modeling. A focused, interdisciplinary research effort incorporating the theoretical formulation of the problem, surface chemistry and hydrodynamic experimentation and measurement, and numerical simulation set the stage for a possible major breakthrough in the field of interfacial flow dynamics. Applications of surfactant hydrodynamics are diverse and include material (e.g. plastics) and food processing, fuel injection spray and atomization, two-phase flow, C02 transport across the ocean surface, and pulmonary surfactant therapy. Also, the development of new surfactants can benefit from the results of the proposed project from improvements in the methodology to measure the intrinsic interfacial properties. These measurement capabilities coupled with the predictive model can shift the design of surfactant materials from a trial-and-error process to a systematic design paradigm based on the principles of mechanics. The aim of this project is to elucidate the role of intrinsic interfacial properties, including surface viscosities (dilatational and shear) and transport kinetics, on the bulk and interfacial transport processes through a mechanistic formulation. This will be accomplished with a simple, reproducible, steady-state flow field, using an experiment in an annular channel flow (the deep-channel viscometer). 1 1

摘要建议编号：CTS 9803478，CTS 9803683主要研究人员：Hirsa/Lopez这是研究表面活性剂影响的气体/液体界面的内在特性的赠款。 该计划将利用新开发的用于表面化学和界面流体动力学的非侵入性光学技术。 这些属性将直接测量，并将其纳入管理方程中，这些方程是从第一原理得出的，而无需进行现象学模型。 一项集中的，跨学科的研究工作，结合了问题，表面化学和水动力实验和测量的理论表述，数值模拟为界面流动动力学领域的可能重大突破奠定了基础。 表面活性剂流体动力学的应用是多种多样的，包括材料（例如塑料）和食物加工，燃油喷射和雾化，两相流动，C02在海面上的C02转运以及肺表面活性剂治疗。 同样，新表面活性剂的开发可以从提出的项目的结果中受益，从方法的改进来测量内在的界面特性。 这些测量功能与预测模型相结合可以将表面活性剂材料的设计从试用过程转移到基于力学原理的系统设计范式中。 该项目的目的是通过机械配方阐明内部界面特性，包括表面粘度（扩张和剪切）以及传输动力学的作用，并通过机械配方在散装和界面传输过程中的作用。 这将使用一个简单的，可重复的，稳态的流场使用环形通道流（深通道粘度计）中的实验来实现。 1 1