Speed and location tracking of moving multiphase interfaces via a capacitance microsensor array during droplet evaporation
Speed and location tracking of moving multiphase interfaces via a capacitance microsensor array during droplet evaporation
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DOI：
10.1016/j.mne.2022.100168
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发表时间：
2022-11
影响因子：
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通讯作者：
Md Tanbin Hasan Mondal;Rifat Hossain;R. Martin;A. Moore
中科院分区：
文献类型：
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作者：
Md Tanbin Hasan Mondal;Rifat Hossain;R. Martin;A. Moore
移动多相接触线的位置和速度的知识提供了对基于冷凝和蒸发的过程（例如在高热通量热管理解决方案中发生的过程）背后的基本物理的重要且有价值的洞察。从应用的角度来看，可以利用这些信息来确定和增强基于相变的冷却过程的设备设计和性能。在这项工作中，我们提出了一种基于电容的相界面传感方法，能够在微尺度上测量移动多相界面的位置和速度，评估基板材料对其性能的影响，并证明其在水滴蒸发过程中在高温下发挥作用的能力。通过掺杂半导体或电介质衬底上的平面叉指电极阵列来实现感测。测量电容随时间的变化有助于在接触线经过每个电极对时感测接触线。这种电容传感方案对所研究的系统是无创的，允许其在许多类型的现有硬件和设备中实现，并且不需要光学访问设备的相变区域。无约束的水滴的结果，它示出的基板材料的选择有显着的影响传感器耦合方面的感测行为。最后，移动的多相接触线的蒸发水滴的数据，以证明在高温下的功能，并在动态传热过程中。
Knowledge of the location and speed of a moving multiphase contact line provides significant and valuable insight into the fundamental physics behind condensation- and evaporation- based processes such as occur in high heat flux thermal management solutions. From an application perspective, this information can be leveraged to ascertain and enhance device design and performance of phase change-based cooling processes. In this work, we present a capacitance-based phase interface sensing approach capable of measuring the location and speed of a moving multi-phase interface at the microscale, evaluate the impact of substrate material on its performance, and demonstrate its ability to function at elevated temperatures during water droplet evaporation. The sensing is accomplished via an array of planar interdigitated electrodes upon either a doped semiconductor or dielectric substrate. Measuring capacitance changes with time facilitates sensing of the contact line as it passes over each electrode pair. This capacitive sensing scheme is noninvasive to the system under study, allowing its implementation into many types of existing hardware and devices and does not require optical access to the phase change area of the device. Results for unconstrained water droplets are presented, and it is shown that the choice of substrate material has a marked impact on sensing behavior in terms of sensor coupling. Finally, data for the moving multiphase contact line of an evaporating water droplet is presented to demonstrate functionality at elevated temperatures and during a dynamic heat transfer process.