Drop Coalescence with a Liquid/liquid Moving Interface

ORAL

Abstract

In this work, the coalescence of a single drop with a moving liquid/liquid interface was investigated. The experiments were conducted in a rectangular flow channel with 5cm x 5cm square section and 1m length. The channel had two openings at the inlet and the outlet with 5 mm height to allow the flow of an aqueous phase at the channel bottom. An organic phase filled the channel on top of the flowing aqueous phase film. A drop of the aqueous phase was created through a nozzle fixed near the inlet of the channel. The drop moved along the channel and eventually coalesced with the moving aqueous phase film. The velocity profiles of both phases were studied first. The rest times of the drops from the moment they contacted the interface to the rupture of the trapped oil film under various flow conditions were further investigated.

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Authors

  • Teng Dong

    ThAMeS Multiphase, Department of Chemical Engineering, UCL, London, UK

  • Weheliye Hashi Weheliye

    University College London, ThAMeS Multiphase, Department of Chemical Engineering, UCL, London, UK

  • Panagiota Angeli

    University College London, ThAMeS Multiphase, Department of Chemical Engineering, UCL, London, UK, ThAMeS Multiphase, Department of Chemical Engineering, University College London, Thames Multiphase, Department of Chemical Engineering, University College London, WC1E 7JE, UK