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首页> 外文期刊>Bulletin of the American Physical Society >APS -70th Annual Meeting of the APS Division of Fluid Dynamics- Event - The incept of ejection from a fresh Taylor cone and subsequent evolution
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APS -70th Annual Meeting of the APS Division of Fluid Dynamics- Event - The incept of ejection from a fresh Taylor cone and subsequent evolution

机译：APS-流体动力学APS部门第70届年会-事件-从新的泰勒锥喷射出来以及随后的演变

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Within a certain range of applied voltages, a pendant drop suddenly subject to an intense electric field develops a cusp from which a fast liquid ligament issues. The incept of this process has common roots with other related phenomena like the Worthington jets, the jet issued after surface bubble bursting or the impact of a drop on a liquid pool. This is experimentally and numerically demonstrated. However, given the electrohydrodynamic nature of the driver in the formation of a Taylor cone, a number of electrokinetic processes take place in the rapid tapering flow, whose characteristic times should be carefully compared to the ones of the flow. As a result, universal scaling laws for the size and charge of the top drop have been obtained. Subsequently, sustaining the applied electric field, the ejection continues and the issuing liquid ligament releases a train of droplets of varying size and charge. Under appropriate conditions and if the liquid suctioned by the electric field is replenished, the system reaches a (quasi)steady state asymptotically. The degree of compliance of the size and charge of those subsequent droplets with previously proposed scaling laws of steady Taylor cone-jets has been studied. Computational code Gerris and an extended electrokinetic module is used.
机译：在一定的施加电压范围内，悬垂液滴突然受到强电场的作用会产生尖峰，从该尖峰发出快速的液体韧带。这个过程的产生与其他相关现象有共同的根源，例如沃辛顿喷流，表面气泡破裂后喷出的喷流或液滴对液体池的影响。这在实验和数值上得到了证明。但是，考虑到驱动器在泰勒锥的形成中具有电流体动力学特性，在快速渐缩流中会发生许多电动过程，应将其特征时间与流的特征时间进行仔细比较。结果，已经获得了关于顶部液滴的大小和电荷的通用缩放定律。随后，在维持所施加的电场的情况下，继续喷射，并且发出的液体韧带释放出一系列大小和电荷不同的液滴。在适当的条件下，如果补充了电场吸引的液体，系统将渐近地达到（准）稳态。已经研究了这些随后的液滴的大小和电荷与先前提出的稳定泰勒锥喷头的定律有关的程度。使用计算代码Gerris和扩展的电动模块。

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