PECASE: The Effect of Surfactant on Topological Transitions in Interfacial Flows

PECASE：表面活性剂对界面流动拓扑转变的影响

• 批准号: 0448078
• 负责人: Ashley James
• 金额: --
• 依托单位: University of Minnesota-Twin Cities
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-02-15 至 2007-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0448078&HistoricalAwards=false
• 关键词: PECASE; Effect; Surfactant; Topological; Transitions

PROPOSAL NO.: CTS-0448078PRINCIPAL INVESTIGATORS: ASHLEY JAMESINSTITUTION: UNIVERSITY OF MINNESOTACAREER: THE EFFECT OF SURFACTANT ON TOPOLOGICAL TRANSITIONS IN INTERFACIAL FLOWSInterface rupture is critical to spray cooling, spray coating, emulsification, encapsulation, fuel atomization, drug delivery, the formation of raindrops, chemical separation, and many other industrial, biomedical, and natural processes. Surfactant is present in many of these applications, either as impurities or by design, but its effects are not well understood. The primary objectives of this grant are: to improve understanding of the physics of rupture in interfacial fluid flow with surfactant; and to develop numerical tools to accurately simulate these processes. Numerical simulations will be based on an axisymmetric volume-of-fluid method for interface tracking on an unstructured, adaptive mesh. The method will include algorithms to simulate the dynamics of soluble and insoluble surfactant. Additionally, van der Waals forces will be included. Comparison to theory and experiments will be used to validate the numerical algorithms. Additional impacts of this grant are the educational and outreach components. Involving undergraduate students in research will enhance learning by providing the students with exposure to cutting-edge research and with the opportunity to think more deeply about fluid mechanics problems. The research program will also be integrated with the re-development of a computational fluid dynamics course. Active learning often equates with better learning, yet most engineering courses still rely on a lecture format. In the new course format students will actively participate in deriving numerical methods, developing codes, debugging, comparing various methods, post-processing, and interpreting results. The final component of the grant is outreach to underrepresented groups with the aims of promoting education and increasing participation in science and engineering. A collaborative project with the Circle of Life School on the White Earth Indian Reservation is aimed at interesting Anishinaabe Indian youth in science and engineering, and at lowering the school's drop-out rate. Hands-on, group activities will be designed to excite the students about learning and to give them a sense of achievement. This program has the potential to greatly impact the students' futures by stimulating them to stay in school. It will also enhance partnerships between the University of Minnesota and the Reservation. An additional outreach activity is for the PI to serve as a role model for women engineering students. Fostering a sense of belonging in women engineering students is critical to their professional fulfillment and to retention as engineering majors. By acting as a mentor, the PI can help woman students make informed choices about their careers.

提案编号：CTS-0448078原理研究者：Ashley Jamesinstitution：明尼苏达州大学：表面活性剂对界面流量破裂中拓扑过渡的影响对于喷雾冷却，喷雾冷却，喷雾，喷涂，乳化，涂层，涂覆，涂层，封装，燃料分离，燃油式和其他化学效果，其他化学，其他化学效果，许多化学效果，许多化学，雨水，许多化学的雨水，雨水，许多化学，雨水，雨水，许多化学，其他化学，雨水，许多化学，其他化学，其他化学，燃油量，许多化学，其他化学，燃油量，雨水，雨水，雨水，许多化学，雨水，许多化学，其他化学，燃油量过程。 表面活性剂在许多应用中都存在，无论是杂质还是通过设计，但其效果尚未得到充分理解。 这笔赠款的主要目标是：提高对用表面活性剂的界面流体流动中破裂物理的理解；并开发数值工具以准确模拟这些过程。 数值模拟将基于一种轴对称量量的流体量方法，用于在非结构化的自适应网格上跟踪接口。 该方法将包括算法，以模拟可溶性和不溶性表面活性剂的动力学。 此外，将包括范德华力。 与理论和实验的比较将用于验证数值算法。 这笔赠款的其他影响是教育和外展组成部分。让本科生参与研究将通过为学生提供尖端研究，并有机会对流体力学问题进行更深入的思考，从而增强学习。 该研究计划还将与计算流体动力学课程的重新开发集成。积极的学习通常等同于更好的学习，但是大多数工程课程仍然依靠演讲形式。 在新课程格式中，学生将积极参与得出数值方法，开发代码，调试，比较各种方法，后处理和解释结果。 赠款的最终部分是向代表性不足的群体推广，其目的是促进教育并增加参与科学和工程学。 与怀特（White Earth Indian）保留地的生命圈学校（Life School）的合作项目针对的是科学和工程学的Anishinaabe印度青年，并降低了学校的辍学率。 动手实践，小组活动将旨在激发学生学习并给他们带来成就感。 该计划有可能通过刺激学生留在学校来极大地影响学生的未来。 它还将增强明尼苏达大学与保留地之间的伙伴关系。额外的外展活动是PI成为女性工程专业学生的榜样。培养女性工程专业学生的归属感对于她们的专业成就和作为工程专业的保留至关重要。 通过担任导师，PI可以帮助女学生对自己的职业做出明智的选择。