Electrically forced jets and microthreads of high viscosity dielectric liquids
Electrically forced jets and microthreads of high viscosity dielectric liquids
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DOI：
10.1016/j.jaerosci.2003.08.004
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发表时间：
2004-02-01
影响因子：
4.5
通讯作者：
Edirisinghe, MJ
中科院分区：
文献类型：
--
作者：
Jayasinghe, SN;Edirisinghe, MJ
一组硅油具有相似的密度、表面张力、相对介电常数和电导率，但粘度范围在970-58200 mPa s之间，用来阐明非常高的粘度对液体电驱动流动的作用。这些油的电导率非常低(类似于10(-9)mS m(-1))，实际上，这些介电液体的行为表明了在处理含有无机粉末的浓缩悬浮液时遇到的粘度和电导率。我们表明，在我们所研究的施加电压-流量制度下，这些油不会经历静电雾化。然而，从一些油中产生了电强迫稳定的射流，在这种情况下，已经估计了射流的直径、残余和液滴的大小。我们发现，在10(3)-10(4)mPa范围内，稳定的球锥射流占优势，然而在bbb10 (4) mPa范围内，液体产生微螺纹。(C) 2003 Elsevier Ltd.版权所有。
A family of silicone oils, of similar density, surface tension, relative permittivity and electrical conductivity but having viscosities in the range 970-58200 mPa s were used to elucidate the role of very high viscosity on the electrically driven flow of liquids. The electrical conductivities of the oils are very low (similar to 10(-9) mS m(-1)) and in effect the behaviour of these dielectric liquids is indicative of the viscosities and electrical conductivities encountered in the processing of concentrated suspensions containing inorganic powders. We show that these oils do not undergo electrostatic atomization in the applied voltage-flow rate regime we have investigated. Nevertheless, electrically forced stable jets are produced from some of the oils and in such instances the jet diameter, size of relics and droplets obtained have been estimated. We show that in the range 10(3)-10(4) mPa s, a stable ball cone jet prevails, however at > 10(4) mPa s the liquids produce micro-threads. (C) 2003 Elsevier Ltd. All rights reserved.