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  • Open Access

    ARTICLE

    A Method Based on Thermo-Vibrational Effects for Hydrogen Transportation and Storage

    Tatyana P. Lyubimova1, Sergey A. Plotnikov2, Albert N. Sharifulin2, Vladimir Ya. Modorskii2, Sergey S. Neshev2, Stanislav L. Kalyulin2,*

    FDMP-Fluid Dynamics & Materials Processing, Vol.20, No.12, pp. 2775-2788, 2024, DOI:10.32604/fdmp.2024.054498 - 23 December 2024

    Abstract Transporting and storing hydrogen is a complex technological task. A typical problem relates to the need to minimize the strength of fluid motion and heat transfer near the walls of the container. In this work this problem is tackled numerically assuming an infinite cavity of pipe square cross-section, located in a constant external temperature gradient. In particular, a method based on the application of vibrations to suppress the gravitational convection mechanism is explored. A parametric investigation is conducted and the limits of applicability of the method for small Grashof numbers (10e4) are determined. It is More >

  • Open Access

    ARTICLE

    Numerical Investigation on the Aerodynamic Noise Generated by a Simplified Double-Strip Pantograph

    Jiawei Shi1, Shuai Ge1, Xiaozhen Sheng2,*

    FDMP-Fluid Dynamics & Materials Processing, Vol.18, No.2, pp. 463-480, 2022, DOI:10.32604/fdmp.2022.017508 - 16 December 2021

    Abstract In order to understand the mechanism by which a pantograph can generate aerodynamic noise and grasp its far-field characteristics, a simplified double-strip pantograph is analyzed numerically. Firstly, the unsteady flow field around the pantograph is simulated in the frame of a large eddy simulation (LES) technique. Then the location of the main noise source is determined using surface fluctuating pressure data and the vortex structures in the pantograph flow field are analyzed by means of the Q-criterion. Based on this, the relationship between the wake vortex and the intensity of the aerodynamic sound source on… More >

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