The shear hysteresis in lamellar structure of surfactant-water binary system

Takenobu Nakamura, Wataru Shinoda, Masuhiro Mikami

    研究成果: Article査読

    1 被引用数 (Scopus)


    We study the shear effect on the lamellar structure of surfactants in water using dissipative particle dynamics simulations. Starting from a lamellar structure without shear flow, we increase the shear rate and then decrease it stepwisely. A weak shear changes the lamellar plane to be parallel to the shear direction though the lamellar normal has no specific direction on the plane normal to the shear direction. By increasing the shear rate, the lamellar normal eventually flips to the vorticity direction regardless of the initial configuration. Lamellar normal would stay along the vorticity direction on decreasing the shear rate. The hysteresis is also found in shear-stress. By varying the shear rate, the time needed to reach the final unique state is significantly shortened compared with that observed with a constant shear rate. We find a correlation between the excess shear-stress and the tilt angle of surfactant in lamellar.

    ジャーナルChemical Physics
    出版ステータスPublished - 2010 1月 18

    ASJC Scopus subject areas

    • 物理学および天文学(全般)
    • 物理化学および理論化学


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