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.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

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


    Contributors:
    Fu, Yifeng (author) / Yuan, Chengqing (author) / Bai, Xiuqin (author)


    Publication date :

    2017-08-01


    Size :

    433673 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



    Turbulent Drag Reduction Using Superhydrophobic Surfaces

    Henoch, C. / Krupenkin, T. / Kolodner, P. et al. | British Library Conference Proceedings | 2006


    Turbulent Drag Reduction Using Superhydrophobic Surfaces

    Henoch, Charles / Krupenkin, Tom / Kolodner, Paul et al. | AIAA | 2006



    APPARATUS, MATERIAL, AND PROCESS FOR SUPERHYDROPHOBIC DRAG REDUCTION

    YANG XIANG / KUNZ ROBERT | European Patent Office | 2025

    Free access