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Visualization study on the behaviors of oscillating liquid bridge between two parallel plates with surface treatments

机译:带有表面处理的两个平行板之间振荡液桥行为的可视化研究

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For more than a decade, energy harvesting devices have been rapidly developed based on the electrical energy conversion techniques from kinetic energy using piezoelectric, electrostatic, and electromagnetic principles. However, the amount of power is insufficient for practical products. Recently, a new concept of energy generation, the reverse electrowetting technology has been invented. This method demonstrates that an oscillating water bridge between two parallel conducting plates can generate an AC electric power. The electrical double-layer capacitors formed on the two interfacial areas of a water bridge and plates are continuously charged and discharged when the shape of the bridge between two plates while the bottom plate is oscillating. For this research, we treat surfaces of each plate hydrophilic and hy-drophobic, give variety to vibration frequency, amplitude and droplet size. Though the images of liquid bridge taken by a high-speed camera, the size of contact area is measured and flow field is observed by PIV, then we find a correlation with output voltage signal. This observation could contribute to more accurate prediction of the behaviors of oscillating droplets and development of micro-fluidic power generation devices.
机译:十多年来,基于电能转换技术,利用压电,静电和电磁原理从动能中快速开发了能量收集装置。但是,功率量不足以用于实际产品。最近,发明了一种新的能量产生概念,即反向电润湿技术。该方法表明,两个平行导电板之间的振荡水桥可以产生交流电。当底板振动时,在两个板之间的桥的形状时,在水桥和板的两个界面区域上形成的双电层电容器连续充电和放电。对于这项研究,我们处理每个板的亲水性和疏水性表面,使振动频率,振幅和液滴尺寸变化。尽管通过高速相机拍摄了液桥的图像,但通过PIV测量了接触面积的大小并观察了流场,然后我们发现了与输出电压信号的相关性。该观察结果可有助于更精确地预测振荡液滴的行为以及开发微流体发电装置。

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