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  • Open Access


    Numerical Analysis of the Hydrodynamic Behavior of a Remotely Operated Vehicle in Multi-Directional Flow

    Hongfei Cao1,2, Zhongda Lyu1,2,3,*, Xi Peng2,3, Zhuo Zhao2,3
    FDMP-Fluid Dynamics & Materials Processing, DOI:10.32604/fdmp.2023.027470
    (This article belongs to this Special Issue: Advances in Solid Waste Processing and Recycling Technologies for Civil Engineering Materials)
    Abstract In recent years, Remotely Operated Vehicles (ROVs) have played an increasingly important role in the construction and monitoring of underwater pile foundations. However, due to the open frame structure of such vehicles, a gap of knowledge still exists with regard to their hydrodynamic behavior. In this study, the hydrodynamic stability of such vehicles is investigated numerically by means of a multiple reference frame method. The hydrodynamic characteristics of the ROV when it moves horizontally and upward in the vertical plane are examined. It is found that there is interference between the horizontal and vertical thrusters of the ROV. There is… More >

  • Open Access


    Weak Expansive Soil Physical Properties Modification by Means of a Cement-Jute Fiber

    Zisheng Yang1, Wendong Li1, Xuelei Cheng1,2,*, Ran Hai1, Shunqun Li3
    FDMP-Fluid Dynamics & Materials Processing, DOI:10.32604/fdmp.2023.025444
    Abstract Sixteen groups of comprehensive tests have been conducted to investigate the modifications in the physical properties of a weak expansive soil due to the addition of a cement jute fiber. The tests have been conducted to analyze the liquid plastic limit, the particle distribution and the free expansion rate. The results show that: (1) With an increase in the cement-jute fiber content, the free expansion rate of the modified expansive soil gradually decreases, however, such a rate rebounds when the fiber content exceeds 0.5% and the cement content exceeds 6%. (2) With an increase in the cement percentage, the particle… More >