Self-propulsion of surfactant droplets on inclined liquid films

D.K.N. Sinz, M. Hanyak, J.C.H. Zeegers, A.A. Darhuber

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    Abstract

    Other presentation title : Mobilization and self-propulsion of surfactant droplets on thin liquid films. We present a systematic investigation of the self-propulsion of insoluble surfactant droplets on spatially confined thin liquid films, deposited on chemically patterned substrates. We studied the dependence of the propelled distance of the droplets on the initial height of the deposited film as well as the initial spreading pressure of the surfactant. We observed an emulsification process of subphase liquid inside the surfactant droplets which is coupled to their self-propelling motion. Using the thin-film approximation, a numerical model is developed for an insoluble surfactant drop moving at constant velocity at the liquid-air interface, the predictions of which compare favorably with the experimental data.
    Original languageEnglish
    Title of host publicationProceedings of the 7th International Conference on Multiphase Flow, May 30 - June 4, 2010, Florida, USA
    EditorsJ. Sinclair Curtis S. Balachandar
    Place of PublicationTampa, Florida
    Pages1.7.3-1/7
    Publication statusPublished - 2010
    Event7th International Conference on Multiphase Flow (ICMF 2010), May 30-June 4, 2010, Tampa, FL, USA - Tampa, FL, United States
    Duration: 30 May 20104 Jun 2010

    Conference

    Conference7th International Conference on Multiphase Flow (ICMF 2010), May 30-June 4, 2010, Tampa, FL, USA
    Abbreviated titleICMF 2010
    CountryUnited States
    CityTampa, FL
    Period30/05/104/06/10

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