CAREER: Large-Eddy Simulation of Turbulent Flows with Dynamically Moving Boundaries

ABSTRACTPROPOSAL没有。主要研究人员：E. balaras机构：马里兰大学职业：具有动态移动边界的湍流大涡模拟研究重点是提高对湍流和过渡流在生物流体应用中的理解。模拟湍流和过渡的高保真方法，如直接数值模拟（DNS）和大涡模拟（LES），为各种工程流的结构和动力学提供了宝贵的信息。然而，由于边界条件极其复杂（移动），这种方法在生物学和生理学中的应用受到的关注相当少。一个典型的例子是心脏和大动脉的血液流动。新的计算工具将在心血管医学中有许多重要的应用，包括疾病研究、手术计划和医疗/生物力学装置设计等主题。材料技术和驱动器小型化的最新进展引发了人们对生物力学的新兴趣。这项工作的广泛影响包括重要的社会和外联部分。通过发展所提出的计算方法，可以解决大量问题，从而促进工程中多个领域的知识进步。特别是对人工心脏瓣膜周围流动的计算将提供详细流动物理的准确描述，并为旨在阐明血液损伤和血栓形成机制的多尺度模拟提供坚实的基础。这些信息将有助于生物医学界解释生理数据和设计新的实验。鱼类游泳，昆虫运动和鸟类飞行是使用DNS/LES进行大规模计算的进一步例子，可以帮助实现新型设备（如微型航空飞行器），并为其运动科学提供新的基础理解。PI正在通过“激励和扩展青少年思想的工程科学技术”（ESTEEM）指导项目参与高中外展活动。他还计划通过马里兰大学的GEMSTONE项目让本科生参与研究，该项目面向荣誉学生，将技术和社会问题整合到整个4年项目的研究项目中。

ABSTRACTPROPOSAL NO.: CTS-0347011PRINCIPAL INVESTIGATORS: E. BALARASINSTITUTION: UNIVERSITY OF MARYLANDCAREER: LARGE-EDDY SIMULATIONS OF TURBULENT FLOWS WITH DYNAMICALLY MOVING BOUNDARIESThe research is focused on improving understanding of turbulent and transitional flows in biofluids applications. High fidelity methods to model turbulence and transition such a Direct Numerical Simulations (DNS) and Large-Eddy Simulations (LES), have contributed invaluable information on the structure and dynamics of a variety of engineering flows. However, such methods have received considerably less attention for applications in biology and physiology due in part to exceedingly complex (moving) boundary conditions. A characteristic example is that of blood flow in the heart and large arteries. New computational tools will have many important applications in cardiovascular medicine, including such topics as disease research, surgical planning and medical/biomemetic device design. Recent advances in material technologies and actuator miniaturization has sparked new interest in biomemetics. Broad impacts of the work include significant societal and outreach components. By developing the proposed computational methodology, a large number of problems can be solved leading to the advancement of knowledge across several fields in engineering. Specifically computations of the flow around prosthetic heart valves will provide an accurate description of the detailed flow physics and provide a solid basis for multiscale simulations designed to illuminate the mechanics of blood damage and thrombus formation. Such information will assist the biomedical community in interpreting physiological data and designing novel experiments. Fish swimming, insect locomotion and bird flight are further examples where massive computations using DNS/LES can help bring to fruition novel devices (such a Micro-Aero Vehicles) and contribute a new fundamental understanding to the science of their locomotion. The PI is participating in high school outreach via the ESTEEM mentorship program (Engineering Science and Technology to Energize and Expand Young Minds). He also plans to involve undergraduates in research via the GEMSTONE program at the University of Maryland, which is for honors students and integrates technological and societal issues into research projects undertaken throughout an entire 4-year program.