US-France Cooperative Research: Particle Distributions in Isotropic Turbulence

9815832Collins这项为期三年的美法流体力学和湍流合作研究奖的获得者是宾夕法尼亚州立大学的Lance Collins和法国奥尔良燃烧与系统反应实验室的Iskender Gokalp。他们提议合作对各向同性湍流中气溶胶颗粒稀释悬浮液分布的直接数值模拟和控制实验进行详细比较。湍流气溶胶产生于广泛的技术流动（气溶胶粉末制造、喷雾燃烧）和自然流动（雨滴和云的形成；大气中的气溶胶运输）。美国研究者为这次合作带来了数值模拟方面的专业知识。法国调查人员的实验专业知识补充了这一点。法国实验室有一个设备，能够在一个立方体中产生固定的各向同性湍流，并进行相同几何形状的数值模拟。耦合实验和数值模拟将促进对颗粒分布如何影响气溶胶过程的理解，如凝固、团聚、汽化，这些过程控制着颗粒或液滴大小分布的演变。

9815832CollinsThis three-year award for US-France cooperative research in fluid mechanics and turbulent flow involves Lance Collins of Pennsylvania State University and Iskender Gokalp of the Laboratoire de Combustion et Systemes Reactifs in Orleans, France. They propose to collaborate on a detailed comparison between direct numerical simulations and controlled experiments of the distribution of a dilute suspension of aerosol particles in isotropic turbulence. Turbulent aerosols arise in a broad range of technological flows (aerosol powder manufacturing, spray combustion) and natural flows (raindrop and cloud formation; aerosol transport in the atmosphere).The US investigator brings to this collaboration expertise in numerical simulations. This is complemented by the French investigator's experimental expertise. The French laboratory has a facility capable of generating stationary isotropic turbulence in a cube with numerical simulations of the same geometry. The coupled experiments and numerical simulations will advance understanding of how particle distribution affects aerosol processes such as coagulation, agglomeration, vaporization that control the evolution of the particle or drop size distribution.