发表机构
Indian Institute of Science（印度科学学院）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究提出涡环作为化学分散剂的环保替代方案，通过雾化油滴和定向迁移两种策略缓解水下溢油，并基于时间尺度分析提出油滴响应与雾化准则，具有广泛工程应用前景。
AI 中文摘要
使用化学分散剂促进油滴破碎仍是控制水下溢油灾难（如深水地平线事件）中快速上升油滴的关键应对策略之一。然而，分散剂对海洋生物的有害影响现已得到公认。在此，我们证明涡环为备受争议的、主要辅助油滴破碎的化学分散剂提供了一种环境友好的替代方案。我们提出两种通过应用涡环的缓解策略：（i）将大油滴雾化为小油滴，这增强了自然分散和生物降解；（ii）在轻微溢油事件期间，将溢油油滴从生态敏感区域定向迁移至更安全的偏远位置。这项概念验证研究表明，涡环能高效雾化水下油滴，同时将其长距离输送。其效率强烈依赖于油滴尺寸分布和涡环强度。利用时间尺度分析和力平衡论证，我们提出了穿越涡环的油滴响应与雾化准则。除雾化和油滴输送（这是许多工程过程的核心）之外，该工作在气泡湍流、农业工业、多相反应器、燃烧过程、大气流体动力学以及从岩石中提取石油等领域也具有高度相关性。
英文摘要
The usage of chemical dispersant to promote the breakup of oil droplets remains one of the crucial response strategy towards controlling the rapidly rising droplets during an underwater oil spillage disaster like the Deepwater horizon. However, the detrimental effects of dispersant on the marine life are now well recognized. Here, we demonstrate that vortex ring presents an environmental friendly alternative to the debatable usage of chemical dispersant that primarily aids droplet break-up. We propose two mitigating strategies through the application of vortex rings: (i) atomization of large oil droplets into smaller droplets, which enhances natural dispersion and biodegradation (ii) targeted relocation of spilled oil droplets from ecologically sensitive regions to safer remote locations during minor spill events. This proof-of-concept study demonstrates that vortex rings can efficiently atomize underwater oil droplets while simultaneously transporting them over long distances. The efficiency strongly depends on the droplet size distribution and the strength of the vortex ring. Using time scale analysis and force balances arguments, we propose droplet response and atomization criteria by a traversing vortex ring. Beyond atomization and droplet transport which are center to many engineering processes, the work finds high relevance in the area of bubble turbulence, agricultural industry, multiphase reactors, combustion process, atmospheric fluid dynamics and oil extraction from rocks, to name a few.
