CAREER: Fluid-Structure Interaction (FSI) in Biological Flows

1453982 Borazjani拟议的职业项目侧重于流体流动与与流体接触的固体相互作用的情况下的流体物理的计算研究。这一研究领域被称为流体结构相互作用(FSI)，是近几年来研究的热点领域。这项研究的目标是探索水环境中的游泳和推进、心血管流动以及利用风力涡轮机收集能量，首先开发准确的模拟技术，然后探索导致能源效率的条件。还提出了向学生、教师和公众宣传STEM的教育活动。PI建议解决FSI中的两个问题，一个是指严格选择合适的预条件来模拟FSI问题的数值问题，另一个是与固体周围的流动物理有关的物理问题。这里提出的强健预处理子的发现，可以影响计算流体动力学技术在其他需要并行计算的问题上的发展。要研究的物理学主要集中在PI提出的假设上，即在水上游泳过程中形成了一个前缘涡旋(Lev)，并且这个Lev是可以稳定或控制的。稳定的电平可以节约能源。还有一个广泛的外展和教育计划，其中包括一个YouTube频道的运营，当地教师专业发展的活动，以及布法罗科学博物馆的外展活动。这个奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。

1453982BorazjaniThe proposed CAREER project is focused on the computational investigation of the fluid physics in cases where fluid flow interacts with the solid in contact with the fluid. This research area is known as Fluid Structure Interaction (FSI), and it is an area of vigorous research in the past few years. The goal of this research is to explore swimming and propulsion in aquatic environments, cardiovascular flows, as well as energy harvesting with wind turbines, by first developing accurate simulation techniques and then exploring the conditions that lead to energy efficiency. Educational activities that promote STEM to students, teachers and the public are also proposed. The PI proposes to address two issues in FSI, one is a numerical issue that refers to the rigorous selection of an appropriate preconditioner for simulating FSI problems, while the second is a physics issue related to the physics of flow around solids. The discovery of robust preconditioners, as proposed here, can affect the development of Computational Fluid Dynamics technologies for other problems, where computations in parallel are needed. The physics to be investigated are focused on the hypothesis put forth by the PI that a leading-edge-vortex (LEV) is formed in aquatic swimming, and that this LEV can be stabilized or controlled. A stable LEV leads to energy savings. There is also an extensive outreach and education plan that includes the operation of a YouTube channel, activities for professional development of local teachers and outreach activities to the Buffalo Museum of Science.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.