Droplet Transport in Flow Turbulence

湍流中的液滴传输

• 批准号: RGPIN-2016-04148
• 负责人: Holloway, Gordon
• 金额: $ 1.89万
• 依托单位: University of New Brunswick
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=638928
• 关键词: Droplet; Transport; Flow; Turbulence

Dilute poly-disperse mixtures of small liquid droplets in gas phase flow is a common feature of both environmental and industrial processes. For example: clouds, humidification and cooling, combustion, surface coating, fire suppression, drug delivery, and pesticide application. In many practical cases the droplets are small enough that their motion is strongly influenced by the gas phase turbulence. The effect of turbulence on the droplet motion depends on the droplet inertia and size relative to the length and velocity scales of the turbulence. In general terms, turbulence causes a diffusion of droplets across the flow and in such a manner as to generate intermittent regions of droplet concentration at the mixing and dissipation scales.

小液滴在气相流中的稀释多分散混合物是环境和工业过程的共同特征。例如：云、加湿和冷却、燃烧、表面涂层、灭火、药物输送和农药施用。在许多实际情况下，液滴足够小，以至于它们的运动受到气相湍流的强烈影响。湍流对液滴运动的影响取决于液滴的惯性和尺寸相对于湍流的长度和速度尺度。一般而言，湍流导致液滴在整个流动中扩散，并且以这种方式在混合和耗散尺度上产生液滴浓度的间歇区域。