电流体力学
电场
光学
标度律
机械
不稳定性
材料科学
物理
缩放比例
几何学
量子力学
数学
作者
Z. Wang,Yü Tian,Chaoyu Zhang,Y. Wang,Weiwei Deng
标识
DOI:10.1103/physrevlett.126.064502
摘要
We report an experimental study on the multiple tip streaming enabled by an externally wetted thin disc in electric fields. The electrohydrodynamic stress acting on the liquid-air interface triggers an interfacial instability that develops into multiple radial liquid ligaments at the rim of the disc. The scaling law suggests that the wave number is inversely proportional to the square of the peak electric field at the rim, which is determined by the combined thickness of the disc and the attached liquid layer. The thin disc edge effectively intensifies the electric field, which in turn leads to spacing between ligaments as short as 30 μm for ethanol, generating over 1000 cone jets for a 1 cm diam thin disc.Received 27 July 2019Revised 9 October 2020Accepted 14 January 2021DOI:https://doi.org/10.1103/PhysRevLett.126.064502© 2021 American Physical SocietyPhysics Subject Headings (PhySH)Research AreasInstability of free-surface flowsInterfacial flowsRayleigh-Taylor instabilityFluid Dynamics
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