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Water Droplets Coalescence Characteristics of W/O Emulsion in the Flow Fluid
Author(s): 
Pages: 801-805
Year: Issue:  4
Journal: Journal of Engineering Thermophysics

Keyword:  flow fieldW/O emulsiondroplets coalescencedimensionless criterion numbers;
Abstract: In this paper,stirred tank experiment system combined with image process software is utilized to study the Water Droplets coalescence characteristics of W/O Emulsion in flow field.The relationship between the diniensionless criterion numbers and the diameter variation is discussed in detail.The new diniensionless criterion number T is proposed to characterize the relationship between turbulent force and inertial force,and experiment is carried out to study the effect of T on the behavior of coalescence of micron-sized drops in oil.It is indicated that the diameters of droplets increased obviously when the water content is about 20% and the Renault number ranges from 2500 to 3000.In this study,the optimal range of Weber number is from 750 to 1050.The variation of the droplets can be divided into three regions with the diniensionless criterion number T.Results of the experiment on criterion number T prove that properly control of the water cut,physical properties and flowing parameters can overcome the adverse external conditions and thus effectively enhance droplets coalescence of W/O Emulsion.
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