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

1453982Borazjani拟议的CAREER项目的重点是在流体流动与接触流体的固体相互作用的情况下，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），是近年来的一个研究热点。这项研究的目标是探索在水生环境中的游泳和推进，心血管流动，以及风力涡轮机的能量收集，首先开发精确的模拟技术，然后探索导致能源效率的条件。还建议开展向学生、教师和公众推广STEM的教育活动。 PI建议解决FSI中的两个问题，一个是数值问题，指的是严格选择合适的预处理器来模拟FSI问题，而第二个是与固体周围流动的物理学相关的物理问题。 发现强大的预处理，这里提出的，可以影响其他问题的计算流体动力学技术的发展，其中需要并行计算。物理学研究的重点是PI提出的假设，即在水中游泳中形成前缘涡（LEV），并且该LEV可以被稳定或控制。稳定的LEV可节省能源。还有一个广泛的外展和教育计划，包括YouTube频道的运作，当地教师的专业发展活动和布法罗科学博物馆的外展活动。该奖项反映了NSF的法定使命，并被认为值得通过使用基金会的知识价值和更广泛的影响审查标准进行评估来支持。

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.