TRANSIENT DEFORMATION OF FREELY-SUSPENDED LIQUID DROPLETS IN ELECTROSTATIC FIELDS
TRANSIENT DEFORMATION OF FREELY-SUSPENDED LIQUID DROPLETS IN ELECTROSTATIC FIELDS
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DOI：
10.1002/aic.690370904
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发表时间：
1991-09-01
期刊：
影响因子：
3.7
通讯作者：
RAITHBY, GD
中科院分区：
文献类型：
--
作者：
HAYWOOD, RJ;RENKSIZBULUT, M;RAITHBY, GD
研究了自由悬浮液滴在静电场作用下的变形问题。 开发的是一个数值模型，能够预测完整的瞬态历史的液滴在系统中具有广泛的分散相和连续相的密度，粘度，相对结晶度，和电场强度。 对于液体/气体系统，数值模型的预测表明，临界场强和临界介电常数比在实际的瞬态破碎不一定是相同的稳态理论预测。 本文还建立了液滴瞬态变形的近似解析模型，该模型能够预测大Ohnesorge数、小变形液/液体系的变形时间历程。 近似的解析模型与完整的数值模型的结果吻合良好。
The problem of freely-suspended liquid droplets deforming due to an applied electrostatic field is examined. Developed is a numerical model capable of predicting the complete transient histories of droplets in systems with a wide range of dispersed- and continuous-phase densities, viscosities, relative permittivities, and electric field strengths. For liquid/gas systems, the predictions of the numerical model demonstrated that the critical field strength and critical permittivity ratio during actual transient breakup are not necessarily the same as those predicted by steady-state theories. An approximate analytical model of transient droplet deformation is also developed, which is able to predict the deformation time histories for large Ohnesorge number, small-deformation liquid/liquid systems. The approximate analytical model agreed well with the results of the complete numerical model.