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  • Open Access

    ARTICLE

    Effect of the Inclination Angle on Slippage Loss in Gas-Liquid Two-Phase Flow

    Yushan Liu1,2, Yubin Su3, Zhenhua Wu4, Wei Luo1,2, Ruiquan Liao1,2,*

    FDMP-Fluid Dynamics & Materials Processing, Vol.16, No.3, pp. 475-488, 2020, DOI:10.32604/fdmp.2020.08896

    Abstract The lifting efficiency and stability of gas lift well are affected by the socalled slippage-loss effect in gas-liquid two-phase flow. The existing studies on this subject have generally been based on vertical and horizontal wells. Only a few of them have considered inclined pipes. In the present work a new focused study is presented along these lines. More specifically, we use the non-slip pressure drop model with Flanigan’s fluctuation correction coefficient formula (together with the parameters of slippage density, slippage pressure drop and slippage ratio) to analyze the influence of the inclination angle on slippage… More >

  • Open Access

    ARTICLE

    Study on Dynamic Prediction of Two-Phase Pipe Flow in Inclined Wellbore with Middle and High Yield

    Xiaoya Feng1, 2, Wei Luo1, 2, *, Yu Lei3, Yubin Su4, Zhigang Fang3

    FDMP-Fluid Dynamics & Materials Processing, Vol.16, No.2, pp. 339-358, 2020, DOI:10.32604/fdmp.2020.08564

    Abstract Gas-liquid two-phase flow is ubiquitous in the process of oil and gas exploitation, gathering and transportation. Flow pattern, liquid holdup and pressure drop are important parameters in the process of gas-liquid two-phase flow, which are closely related to the smooth passage of the two-phase fluid in the pipe section. Although Mukherjee, Barnea and others have studied the conventional viscous gas-liquid two-phase flow for a long time at home and abroad, the overall experimental scope is not comprehensive enough and the early experimental conditions are limited. Therefore, there is still a lack of systematic experimental research… More >

  • Open Access

    ARTICLE

    Slug Flow Characteristics in Inclined and Vertical Channels

    Zhihui Wang1,2,3, Wei Luo1,2,3,*, Ruiquan Liao1,2,3, Xiangwei Xie4, Fuwei Han5, Hongying Wang6

    FDMP-Fluid Dynamics & Materials Processing, Vol.15, No.5, pp. 583-595, 2019, DOI:10.32604/fdmp.2019.06847

    Abstract Horizontal well production technology gradually occupies a dominant position in the petroleum field. With the rise in water production in the later stage of exploitation, slug flow phenomena will exist in horizontal, inclined and even vertical sections of gas wells. To grasp the flow law of slug flow and guide engineering practice, the flow law of slug flow at various inclination angles (30°~90°) is studied by means of the combination of laboratory experiments (including high frequency pressure data acquisition system) and finite element numerical simulation. The results reveal that because of the delay of pressure… More >

  • Open Access

    ARTICLE

    Influence of Arterial Wall Compliance on the Pressure Drop across Coronary Artery Stenoses under Hyperemic Flow Condition

    Bhaskar Chandra Konala, Ashish Das, Rupak K Banerjee∗,†

    Molecular & Cellular Biomechanics, Vol.8, No.1, pp. 1-20, 2011, DOI:10.3970/mcb.2011.008.001

    Abstract Hemodynamic endpoints such as flow and pressure drop are often measured during angioplasty procedures to determine the functional severity of a coronary artery stenosis. There is a lack of knowledge regarding the influence of compliance of the arterial wall-stenosis on the pressure drop under hyperemic flows across coronary lesions. This study evaluates the influence in flow and pressure drop caused by variation in arterial-stenosis compliance for a wide range of stenosis severities. The flow and pressure drop were evaluated for three different severities of stenosis and tested for limiting scenarios of compliant models. The Mooney-Rivlin… More >

  • Open Access

    ARTICLE

    Simulation of Thermal Fluid-structure Interaction Phenomena in a Liquid Sodium Porous System

    Yan Shen1, Hong Zhang1,2,3, Hui Xu1, Tong Bai1, Ping Yu1

    FDMP-Fluid Dynamics & Materials Processing, Vol.10, No.1, pp. 63-81, 2014, DOI:10.3970/fdmp.2014.010.063

    Abstract Single-unit and multi-unit models of porous media (metal felts) have been used to investigate thermal fluid-structure interaction phenomena in a liquid sodium system. Micro-scale aspects have been studied via numerical simulations. The permeability of metal felts has been measured experimentally to verify the reliability of the models used. This integrated approach has allowed a proper evaluation of the interdependencies among phenomena on different scales (including relevant information on skeleton deformation and pressure drop as a function of different parameters). Pressure drop generally increases with velocity and heat flux for both laminar and turbulent flows. The More >

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