Sedimentation in Settling Tanks Having Inclined Walls - The Boycott Effect

具有倾斜壁的沉淀池中的沉淀 - 抵制效应

• 批准号: 8604067
• 负责人: Andreas Acrivos
• 金额: $ 5.9万
• 依托单位: Stanford University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1986
• 资助国家: 美国
• 起止时间: 1986-08-01 至 1988-01-01
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8604067&HistoricalAwards=false
• 关键词: Sedimentation; Settling; Tanks; Having; Inclined

The rate at which solid particles sediment under the action of gravity can be greatly enhanced if the walls of the settling vessel are inclined rather than vertical. This phenomenon, often referred to as "The Boycott Effect", plays an increasingly important role in a variety of separation processes because, in principle, the sedimentation rate can be enhanced by several orders of magnitude if the vessel is properly designed. Recently, a theory has been developed for modeling such systems; a key restriction of that theory which required that the particle Reynolds number be vanishingly small will now be relaxed in an approximate manner and the resulting theoretical predictions will be tested experimentally. The overall objective of this research is to develop a reliable theoretical framework for modeling the operation of supersettlers under conditions encountered in practice.

如果沉淀器的壁是倾斜的而不是垂直的，在重力作用下固体颗粒的沉积速度可以大大提高。这种现象通常被称为“抵制效应”，在各种分离过程中发挥着越来越重要的作用，因为原则上，如果容器设计得当，沉淀率可以提高几个数量级。最近，已经发展了一种理论来模拟这种系统；该理论的一个关键限制，即要求粒子雷诺数为零，现在将以近似的方式放松，由此产生的理论预测将在实验中得到验证。这项研究的总体目标是建立一个可靠的理论框架，用于模拟实践中遇到的条件下超级市场的运作。