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  • Open Access

    ARTICLE

    A Study on the Physical Properties of Banana Straw Based on the Discrete Element Method

    Sen Zhang1, Jie Jiang2,3,*, Yuedong Wang4
    FDMP-Fluid Dynamics & Materials Processing, DOI:10.32604/fdmp.2022.024070
    (This article belongs to this Special Issue: Computational Mechanics and Fluid Dynamics in Intelligent Manufacturing and Material Processing)
    Abstract To improve the application of discrete element models (DEM) to the design of agricultural crushers, in this study a new highly accurate model is elaborated. The model takes into account the fiber structure, porous nature of the material and the leaf sheath coating structure. Dedicated experimental tests are conducted to determine the required “intrinsic” and basic contact parameters of the considered banana straw materials. A large number of bonding parameters are examined in relation to the particle aggregation model in order to characterize different actual banana straws. Using the particle surface energy contact model, the viscosity characteristics of the crushed… More >

  • Open Access

    ARTICLE

    Simulation of Gas-Water Two-Phase Flow in Tight Gas Reservoirs Considering the Gas Slip Effect

    Mingjing Lu1,2,*, Zenglin Wang1,3, Aishan Li1, Liaoyuan Zhang1, Bintao Zheng1, Zilin Zhang1
    FDMP-Fluid Dynamics & Materials Processing, DOI:10.32604/fdmp.2023.023188
    (This article belongs to this Special Issue: Meshless, Mesh-Based and Mesh-Reduction Methods Based Analysis of Fluid Flow in Porous Media)
    Abstract A mathematical model for the gas-water two-phase flow in tight gas reservoirs is elaborated. The model can account for the gas slip effect, stress sensitivity, and high-speed non-Darcy factors. The related equations are solved in the framework of a finite element method. The results are validated against those obtained by using the commercial software CMG (Computer Modeling Group software for advanced recovery process simulation). It is shown that the proposed method is reliable. It can capture the fracture rejection characteristics of tight gas reservoirs better than the CMG. A sensitivity analysis of various control factors (initial water saturation, reservoir parameters,… More >

  • Open Access

    ARTICLE

    The Impact of Sun Radiation on the Thermal Comfort in Highly Glazed Buildings Equipped with Floor Heating Systems

    Abdelatif Merabtine1,*, Abdelhamid Kheiri2, Salim Mokraoui3, Lyes Bellagh1
    FDMP-Fluid Dynamics & Materials Processing, DOI:10.32604/fdmp.2023.022029
    Abstract Occupants of highly glazed buildings often suffer from thermal discomfort during the mid-seasons when no shadings are used in such buildings, especially when inertial heating systems are used. The present study is devoted to evaluating the impact of long solar beam exposure on the internal thermal discomfort in glazed spaces when heating is implemented through a floor system. A comprehensive experimental study is carried out using an experimental bi-climatic chamber which is fully monitored and controlled, allowing realistic simulations of the dynamic movement of the sun patch on a heated slab. The findings show that a period of discomfort as… More >