As energy-conservation and emission-reduction become more and more severe, the concept of Green Ship has been proposed. And drag reduction is a realizable method to achieve this goal. Superhydrophobic surfaces (SHSs) whose contact angle is greater than 150° have attracted much attention because of the ability of realizing drag reduction in turbulent flows. However, few researchers focus on the application of SHSs in shipping industry. In this paper, a numerical study of turbulent channel flows and turbulent boundary layers developing over SHSs are performed. In the simulation, the VOF multiphase flow model is used for the gas-liquid phase flow, and a superhydrophobic surface microstructure grid with local encryption technology is adopted. The results show that within the range of ship economic speed, a stable gas vortex can form in the upper part of microstructure, and the drag reduction ratio of SHSs has a close relationship with size of velocity, gas-liquid contact area, and soaking time.


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    Titel :

    A numerical study of drag reduction of superhydrophobic surfaces in shipping industry


    Beteiligte:
    Fu, Yifeng (Autor:in) / Yuan, Chengqing (Autor:in) / Bai, Xiuqin (Autor:in)


    Erscheinungsdatum :

    01.08.2017


    Format / Umfang :

    433673 byte




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



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