Innovative methods for the dynamics of immersed structures in complex fluids

复杂流体中浸没结构动力学的创新方法

• 批准号: 1016310
• 负责人: Hector Ceniceros
• 金额: $ 40.12万
• 依托单位: University of California-Santa Barbara
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-08-15 至 2014-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1016310&HistoricalAwards=false
• 关键词: Innovative; methods; dynamics; immersed; structures

The investigator and collaborators propose to develop a new class of Immersed Boundary-based methods to investigate the interaction of a large number of immersed structures in 2D and 3D with a complex (non-Newtonian) fluid. These innovative methods will have the computational efficiency demanded by some outstanding, formidable problems of flow-structure interaction in complex fluids and will establish new paradigms in the modeling and simulation of these type of systems. To achieve this, the investigator and the project's participants will introduce fundamentally innovative approaches for the fast computation of the influence of the structure on the flow, for the rapid solution of robust, implicit discretizations, and for model building and computation in the presence of a complex fluid in important applications. While the new approaches will be designed with concrete problems in mind (collective sperm motility in a complex fluid and peristaltic pumping), their applicability will be broad.A myriad of technologically and scientifically important problems can be described as the interaction of a flow and immersed structures that could be elastic or rigid and could come in a broad range of shapes and length scales, from nano to macro. The swimming of micro-organisms like cellular and flagellar locomotion, sperm motility, insect flight, aerodynamic design, cardiac fluid dynamics, and processing of polymeric materials are just a few important examples. There is now a recognized, pressing need to investigate these dynamics in more realistic fluid environments which take into account the frequent viscoelastic character of the underlying complex flow. The project focuses on the development of fluid models and efficient computational tools to investigate this important class of problems. Research and education will be vigorously integrated in a multi-disciplinary environment with a sustained effort to promote and broaden the participation of underrepresented groups, with the active participation of undergraduates, with innovative pedagogic initiatives and modes of collaboration, and with ties with the industrial sector.

研究人员和合作者建议开发一类新的基于浸入边界的方法，以研究2D和3D中大量浸入结构与复杂（非牛顿）流体的相互作用。这些创新的方法将具有复杂流体中一些突出的、艰巨的流固相互作用问题所需的计算效率，并将为这类系统的建模和仿真建立新的范式。为了实现这一目标，研究者和项目参与者将引入根本性的创新方法，用于快速计算结构对流动的影响，快速解决鲁棒隐式离散化问题，以及在重要应用中存在复杂流体的模型构建和计算。虽然新方法的设计将考虑到具体问题（复杂流体中的集体精子运动和蠕动泵），但它们的适用性将是广泛的。无数技术和科学上的重要问题可以被描述为流动和浸入结构的相互作用，这些结构可以是弹性的或刚性的，可以有从纳米到宏观的各种形状和长度尺度。微生物的游动，如细胞和鞭毛运动、精子运动、昆虫飞行、空气动力学设计、心脏流体动力学和聚合物材料的加工，都是一些重要的例子。现在人们认识到，迫切需要在更现实的流体环境中研究这些动力学，考虑到潜在复杂流动的频繁粘弹性特征。该项目侧重于开发流体模型和高效计算工具来研究这类重要问题。研究和教育将在多学科环境中大力结合，持续努力促进和扩大代表性不足的群体的参与，大学生积极参与，创新的教学倡议和合作模式，并与工业部门建立联系。