Fluid Mechanics Research

拟议的研究的目的是有助于在以下流体力学的基本问题的知识。 1.湍流结构和湍流混合：i）剪切湍流中连续点源被动标量弥散的测量。al混合层在剪切湍流; ii）测量的概率密度函数和精细结构的温度波动的热混合层嵌入剪切湍流的属性; iii）相干结构在USF与结构附近的固定和移动的墙壁的相互作用。 2.涡流动力学：i）翼尖涡流和自由流紊流之间的相互作用; ii）强迫周期和随机激励下的涡流不稳定性; iii）运动壁附近的涡流脱落。 3.心血管力学：i）在通过生理学精确的主动脉模型的脉动流中，在双叶机械心脏瓣膜附近的血流的体外研究; ii）在犬心脏中的血流和心肌运动的数值模拟; iii）在心室辅助装置中的血流的数值模拟。 这项关于基础工程问题的长期研究将与有助于解决核工业和航空航天工业紧迫技术问题的实验和计算研究平行进行，这些研究由NSERC和工业界的CRD赠款资助，与本提案无关。

The objective of the proposed research is to contribute to knowledge in the following fundamental problems of fluid mechanics. 1. Turbulence structure and turbulent mixing: i) measurements of passive scalar dispersion from a continuous point source in sheared turbulence. al mixing layer in sheared turbulence; ii) measurements of probability density functions and fine-structure properties of temperature fluctuations in a thermal mixing layer embedded in sheared turbulence; iii) interactions of coherent structures in USF with structures near stationary and moving walls. 2. Vortex dynamics: i) interactions between a wing-tip vortex and free-stream turbulence; ii) vortex instability under forced periodic and random excitations; iii) vortex shedding near a moving wall. 3. Cardiovascular mechanics: i) in vitro studies of blood flow near a bileaflet mechanical heart valve in pulsatile flow through a physiologically accurate model of the aorta; ii) numerical simulations of blood flow and myocardium motion in the canine heart; iii) numerical simulations of blood flow in diaphragm-type ventricular assist devices. This long-term research on fundamental engineering problems will be conducted in parallel with experimental and computational research contributing to the solution of pressing technological problems of the nuclear and aerospace industries, which is financed by CRD grants by NSERC and the Industry and is unrelated to the present proposal.