Study of Vortex Reconnection by means of Holographic particle Velocimetry

全息粒子测速法研究涡旋重联

• 批准号: 9904328
• 负责人: Fazle Hussain
• 金额: $ 34万
• 依托单位: University of Houston
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-06-15 至 2002-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9904328&HistoricalAwards=false
• 关键词: Study; Vortex; Reconnection; means; Holographic

CTS-9904328Fazle Hussain/University of HoustonThe Hussain proposal combines a fundamental investigation of a basic process in fluid dynamics: -- the viscous modification of the field of vorticity filaments associated with i) colliding rings and ii) an elliptical ring -- with the development of an advanced measurement technique: holographic particle velocimetry.The fluid mechanics aspects will have an impact on the processes which are responsible, for example, for fine scale mixing (of intrinsic importance in non-premixed combustion, etc.) and dissipation of turbulence kinetic energy. The proposed efforts, to further develop HPV, will bring a significant advancement in this unique method to gain an instantaneous snapshot of a flow field. The proposer and his colleagues have pioneered in the initial development efforts and he is distinctly well suited to pursue this further capability.It is noteworthy that the proposer will combine, in this integrated activity, research paths that are of recognized importance in Fluid Dynamics and for which he has been one of the principal pioneers, viz., the evolution of concentrated fields of vorticity.The parallel (and independently funded) numerical simulations of this flow constitute a very important aspect of the investigation's contribution. The potential difficulties in these computations derive from quite different attributes when compared with those faced by the experimentalists. Hence, using the two bodies of results in a comparative manner will be of significant importance in isolating/identifying errors and limitations that may characterize each of the separate approaches.

CTS-9904328 Fazle Hussain/休斯顿大学Hussain的提案结合了对流体动力学基本过程的基本研究：--与i）碰撞环和ii）椭圆环相关的涡量细丝场的粘性修改--以及先进测量技术的发展：流体力学方面将对负责例如精细尺度混合（在非预混燃烧等中具有内在重要性）的过程产生影响。以及湍流动能的耗散。 为进一步开发HPV而提出的努力将在这种独特的方法中带来重大进步，以获得流场的瞬时快照。 建议者和他的同事在最初的开发工作中是先驱，他显然非常适合追求这种进一步的能力。值得注意的是，建议者将在这个综合活动中结合联合收割机，在流体动力学中具有公认的重要性的研究路径，并且他一直是主要的先驱之一，即，集中涡量场的演变。这种流动的并行（和独立资助的）数值模拟构成了调查贡献的一个非常重要的方面。 这些计算中的潜在困难来自与实验主义者所面临的困难相比完全不同的属性。 因此，以比较的方式使用这两套结果，对于分离/查明每种不同方法可能存在的错误和局限性具有重要意义。