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  • Journal article
    Yeo LY, Matar OK, de Ortiz ESP, Hewitt GFet al., 2001,

    The dynamics of Marangoni-driven local film drainage between two drops

    , JOURNAL OF COLLOID AND INTERFACE SCIENCE, Vol: 241, Pages: 233-247, ISSN: 0021-9797
  • Journal article
    Matar OK, Craster RV, 2001,

    Models for Marangoni drying

    , PHYSICS OF FLUIDS, Vol: 13, Pages: 1869-1883, ISSN: 1070-6631
  • Journal article
    Mietus WGP, Matar OK, Seevaratnam G, Wong A, Briscoe BJ, Lawrence CJet al., 2001,

    Couette flow of two immiscible liquids between two concentric cylinders: The formation of toroidal drops and liquid sheaths

    , PHYSICAL REVIEW LETTERS, Vol: 86, Pages: 1211-1214, ISSN: 0031-9007
  • Conference paper
    Yeo LY, Matar OK, de Ortiz SP, Hewitt GFet al., 2001,

    Predicting phase inversion behaviour using a Monte Carlo technique

    , 2nd International Symposium on Multi-Phase Flow and Transport Phenomena, Publisher: BEGELL HOUSE, INC, Pages: 144-151
  • Journal article
    Craster RV, Matar OK, 2000,

    The role of dynamic modulation in the stability of viscoelastic flow down an inclined plane

    , Journal of Fluid Mechanics, Vol: 425, Pages: 213-233, ISSN: 0022-1120

    In this study we have theoretically investigated the effect of parallel superposition of modulation on the stability of single-layer Newtonian and viscoelastic flows down an inclined plane. Specifically, a specifically, a spectrally based numerical technique in conjunction with Floquet theory has been used to investigate the linear stability of this class of flows. Based on these analyses we have demonstrated that parallel superposition of modulation can be used to stabilize or destabilize flow of Newtonian and viscoelastic fluids down an inclined plane. In general at low Reynolds number Re (i.e. O(1)) and in the limit of long and O(1) waves the effect of dynamic modulation on the stability of viscoelastic flows is much more pronounced; however, relatively large modulation amplitudes are required to achieve significant stabilization/destabilization. In addition, the dependence of the most dominant modulation frequencies on Re and the Weissenberg number We have been identified. Specifically, it has been shown that for Newtonian flows low-frequency modulations are destabilizing and the most dominant modulation frequency scales with 1/Re. On the other hand, for viscoelastic flows in the absence of fluid inertia low-frequency modulations are stabilizing and the most dominant modulation frequency scales with 1/We. In finite-Re viscoelastic flows the most dominant destabilizing modulation frequency scales with 1/Re while the most stabilizing modulation frequency scales with 1/WeRe. Finally, it has been demonstrated that the mechanism of both purely elastic and inertial instabilities in flows down an inclined plane is unchanged in the presence of dynamic modulation.
  • Journal article
    Craster RV, Matar OK, 2000,

    Surfactant transport on mucus films

    , Journal of Fluid Mechanics, Vol: 425, Pages: 235-258
  • Journal article
    Yeo LY, Matar OK, Perez de Ortiz ES, Hewitt GFet al., 2000,

    Phase inversion and associated phenomena

    , Multiphase Science and Technology, Vol: 12, Pages: 51-116
  • Journal article
    Matar OK, Troian SM, 1999,

    The development of transient fingering patterns during the spreading of surfactant coated films

    , PHYSICS OF FLUIDS, Vol: 11, Pages: 3232-3246, ISSN: 1070-6631
  • Journal article
    Matar OK, Troian SM, 1999,

    Spreading of a surfactant monolayer on a thin liquid film: Onset and evolution of digitated structures

    , Chaos, Vol: 9, Pages: 141-153
  • Journal article
    Matar OK, Troian SM, 1998,

    Growth of non-modal transient structures during the spreading of surfactant coated films

    , Physics of Fluids, Vol: 10, Pages: 1234-1236

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