Liquid-liquid flow past a bluff body

ORAL

Abstract

The generation of instabilities behind a bluff body bounded by a pipe wall and its effects on flow pattern transitions from separated to dispersed oil-water flows are studied. A cylindrical bluff body is located in the water phase and the transverse direction of the flow. Investigations are conducted for flow rates that result in stratified flow in the absence of the bluff body. A high-speed camera is used to track the interfacial waves while the velocity profile in the water phase is determined by PIV. Numerical studies on single-phase flow assist in designing new bluff bodies. The results showed that the choice of the bluff body and its location generated vortices with frequencies similar to unbounded flows that corresponded to Strouhal number of 0.2. In two-phase flows, the bluff body generates waves with frequencies similar to the von K\'{a}rm\'{a}n vortices in the water phase behind the cylinder. The formation of the waves depended on the distance of the bluff body from the oil-water interface.

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Authors

  • Kyeong H. Park

    Department of Chemical Engineering, University College London, Torrington Place, London WC1E 7JE, UK

  • M.I.I. Zainal Abidin

    Department of Chemical Engineering, University College London, Torrington Place, London WC1E 7JE, UK

  • Panagiota Angeli

    Department of Chemical Engineering, University College London, Torrington Place, London WC1E 7JE, UK, Univ Coll London

  • Lyes Kahouadji

    Imperial College London, Department of Chemical Engineering, Imperial College London, South Kensington Campus, London SW7 2AZ, UK

  • Zhihua Xie

    Imperial College London, Department of Chemical Engineering, Imperial College London, South Kensington Campus, London SW7 2AZ, UK

  • Omar Matar

    Imperial College London, Department of Chemical Engineering, Imperial College London, South Kensington Campus, London SW7 2AZ, UK

  • Christopher C. Pain

    Imperial College London, Applied Modelling and Computation Group, Department of Earth Science and Engineering, Imperial College London, South Kensington Campus, London SW7 2AZ