UNS: Dynamic Contact Line Region Heat Transfer and Interface Behavior at High Heat Fluxes Through a Controlled Oscillating Meniscus

首席研究员建议研究沸腾现象（很像在锅中沸腾）时，表面温度远远高于沸腾温度。 其结果具有许多工业应用，包括冷却强大的计算机和超级计算机设备。 PI还将使用工业冷却中常用的水以外的液体。 研究生将参与研究活动。 PI将扩大他目前的工作与学生在6年级班从富兰克林罗斯福中学从罗切斯特市学区服务少数民族和贫困学生夹在蒸汽泡和固体表面之间的液体膜的蒸发（即，弯月面）负责相变。 PI将在压力控制环境中对三种液体和不同表面上的蒸发弯月面进行实验，模拟和分析研究。 PI提出了高达CHF（临界热通量）条件的沸腾条件。 预期的结果将提供以下方面的定量数据：（a）通过以高时间分辨率捕获激光干涉条纹获得的瞬态膜厚度，（B）底层加热器表面的高分辨率瞬态热响应，以及（c）接触角和高速成像界面调制。 所提出的任务是重要的，并通过使用具有高分辨率（每秒50，000帧）的高速光学方法提供很少获得的高质量数据，同时使用组合的分析和数值方法来帮助阐明弯月面区域中的物理和传热机制。

The principal investigator proposes to investigate the boiling phenomenon (much like boiling in a pan) when the surface temperature is exceedingly higher than boiling temperature. The result has many industrial applications including cooling powerful computer and supercomputer devices. The PI will also use liquids other than water that are commonly used in industrial cooling. Graduate students will be involved in the research activities. The PI will expand his current work with students in the 6th grade class from Franklin Roosevelt Middle School from the Rochester city school district serving minority and underprivileged students.The evaporation of liquid film sandwiched between the vapor bubble and the solid surface (i.e., the meniscus) is responsible for the phase change. The PI will perform experiments, simulations and analytical studies on an evaporating meniscus in a pressure-controlled environment with three liquids and on different surfaces. The PI proposes boiling conditions up to CHF (critical heat flux) conditions. The intended results will provide quantitative data on (a) transient film thickness by capturing laser interference fringes at high temporal resolutions, (b) high-resolution transient thermal response of the underlying heater surface, and (c) contact angle and interface modulation with high speed imaging. The proposed tasks are important and provide high-quality data that have been rarely obtained, by using high-speed optical methods with high resolutions (50,000 frames per second), while using a combined analytical and numerical method to help elucidate the physics and heat transfer mechanism in the meniscus region.