Acoustic levitation of water droplets in an environmentally controlled chamber

环境控制室中水滴的声悬浮

• 批准号: 1792936
• 金额: --
• 依托单位: University of Bristol
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2016
• 资助国家: 英国
• 起止时间: 2016 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-1792936
• 关键词: Acoustic; levitation; water; droplets; environmentally

This project involves building an acoustic levitator suitable for levitatingmicrolitre or smaller water droplets in an environmentally controlled chamber.The benefit of having the levitator is to prevent any interactions the dropletswould have with any substrate they were sitting on. The droplets will becooled at a controlled rate, with measurements being made on the freezingtemperatures of water droplets with different types of ice nucleating particles,as well as different salt concentrations. Tasks involve building a suitableenvironmentally controlled chamber which can cool the droplets withoutinducing air currents and therefore oscillations, as well as developing amethod to introduce droplets and detect when they have frozen. As thedroplets get smaller evaporation will also have to be taken into account, andthe humidity will have to be controlled to ensure the droplets last longenough to freeze.

该项目涉及建造一个声学悬浮器，适用于悬浮微升或更小的水滴在环境控制的腔室。拥有悬浮装置的好处是防止液滴与它们所在的任何基质发生相互作用。通过测量不同类型的冰核粒子和不同盐浓度的水滴的结冰温度，液滴将以一个受控的速度冷却。任务包括建立一个合适的环境控制室，可以在不引起气流和振荡的情况下冷却液滴，以及开发方法来引入液滴并检测它们何时冻结。随着液滴变小，蒸发也必须考虑在内，而且必须控制湿度，以确保液滴能够持续足够长的时间来冻结。