Efficient coalescence of two spreading drops

两个扩散液滴的有效聚结

• 批准号: RGPIN-2015-06542
• 负责人: Waghmare, Prashant
• 金额: $ 1.6万
• 依托单位: University of Alberta
• 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=638291
• 关键词: Efficient; coalescence; two; spreading; drops

Liquid drop coalescence is a ‘mass transfer’ process between two miscible liquid drops after being brought in the vicinity of each other. This can be observed in both natural (rain drops and condensation of dew) and artificially engineered processes (film growth, inkjet printing, spraying, etc.). Controlled drop coalescence of simultaneously spreading drops is a crucial aspect for a number of applications as mentioned above. Coalescence dynamics in such applications dictates the efficient mass transfer between two spreading drops, and inefficient coalescence of spreading drops may result in several undesirable effects such as longer printing time, overuse of printing ink and wastage and spillage of environmentally hazardous liquids (up to ~50%) during spraying of pesticides or de-icing of planes. In order to significantly reduce such losses, in this research program the precise way to control the drop coalescence on the substrate is provided.

液滴聚结是指两个可混溶液滴被带到彼此附近后的“传质”过程。这在自然(雨滴和露水凝结)和人工工程(胶片生长、喷墨打印、喷涂等)过程中都可以观察到。同时扩散液滴的受控液滴合并是如上所述的许多应用的关键方面。这种应用中的聚结动力学决定了两个铺展液滴之间的有效传质，而铺展液滴的低效聚结可能会导致几种不良影响，如打印时间较长、印刷油墨过度使用以及在喷洒农药或飞机除冰期间浪费和溢出环境有害液体(高达~50%)。为了显著减少这种损失，在本研究计划中，提供了控制基片上液滴合并的精确方法。