title: Investigation on Transient Oscillation of Droplet Deformation before Conical Breakup under Alternating Current Electric Field.
abstract: In this paper, the conical breakup of a water droplet suspended in oil under the alternating current (ac) electric field was experimentally studied with the help of a high-speed video camera. We observed three stages of transient oscillation of deformation characterized by deformation degree l* before the conical breakup that were described in detail. Then a theoretical model was developed to find out the dynamic mechanisms of that behavior. Despite a very small discrepancy, good agreement between model predictions and experimental observations of the evolution of the droplet deformation was observed, and the possible reasons for the discrepancy were discussed as well. Finally, the stresses on the interface were calculated with the theoretical model and their influence on the dynamic behavior before the breakup was obtained. The differences between the droplet breakup mode of ac and direct current electric field are also discussed in our paper.
authors.affiliation: College of Pipeline and Civil Engineering, China University of Petroleum, No. 66 Changjiang West Road, Qingdao, Shandong 266580, China.
authors.forename: Haipeng
authors.initials: H
authors.lastname: Yan
authors.affiliation: College of Pipeline and Civil Engineering, China University of Petroleum, No. 66 Changjiang West Road, Qingdao, Shandong 266580, China.
authors.forename: Limin
authors.initials: L
authors.lastname: He
authors.affiliation: College of Pipeline and Civil Engineering, China University of Petroleum, No. 66 Changjiang West Road, Qingdao, Shandong 266580, China.
authors.forename: Xiaoming
authors.initials: X
authors.lastname: Luo
authors.affiliation: College of Pipeline and Civil Engineering, China University of Petroleum, No. 66 Changjiang West Road, Qingdao, Shandong 266580, China.
authors.forename: Jing
authors.initials: J
authors.lastname: Wang
authors.affiliation: College of Pipeline and Civil Engineering, China University of Petroleum, No. 66 Changjiang West Road, Qingdao, Shandong 266580, China.
authors.forename: Xin
authors.initials: X
authors.lastname: Huang
authors.affiliation: College of Pipeline and Civil Engineering, China University of Petroleum, No. 66 Changjiang West Road, Qingdao, Shandong 266580, China.
authors.forename: Yuling
authors.initials: Y
authors.lastname: Lü
authors.affiliation: College of Pipeline and Civil Engineering, China University of Petroleum, No. 66 Changjiang West Road, Qingdao, Shandong 266580, China.
authors.forename: Donghai
authors.initials: D
authors.lastname: Yang