The electric field of chaotic pulse group(CPG)can be used for emulsion demulsification,but the coalescence characteristics of emulsion droplets in oil are still unknown.Therefore,the coalescence characteristics of oil droplets in the electric field of CPG and the influence of electric field parameters on the droplet coalescence were studied numerically.The results show that the droplet coalescence process under the action of CPG electric field can be divided into six stages,and the presentation of each stage is related to the action time and rest time of electric field,among which the duration of Stage Ⅲ has a big influence on the coalescence time.The duty cycle affects the droplet coalescence process and coalescence time,and the increased electric field strength makes no significant effect on the coalescence state of droplets.When the electric field strength increases from 500 kV/m to 700 kV/m,the droplet coalescence time can decrease from 0.400 s to 0.152 s.The results of this study can provide a theoretical basis for the application of CPG electric field in industry.
关键词
油包水乳液/混沌脉冲组/聚结特性/液滴/电场参数/数值分析
Key words
water-in-oil emulsion/chaotic pulse group/coalescence characteristics/droplet/electric field parameter/numerical analysis
维普
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