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  • Open Access


    A Dynamic Plunger Lift Model for Shale Gas Wells

    Shiyu Miao1,2,3, Xiao Liu4, Xiaoya Feng6, Haowen Shi1,2,3, Wei Luo1,2,3,*, Peng Liu5

    FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.7, pp. 1735-1751, 2023, DOI:10.32604/fdmp.2023.025681

    Abstract At present, the optimization of the plunger mechanism is shale gas wells is mostly based on empirical methods, which lack a relevant rationale and often are not able to deal with the quick variations experienced by the production parameters of shale gas wells in comparison to conventional gas wells. In order to mitigate this issue, in the present work, a model is proposed to loosely couple the dynamics of gas inflow into shale gas wells with the dynamics of the liquid inflow. Starting from the flow law that accounts for the four stages of movement More > Graphic Abstract

    A Dynamic Plunger Lift Model for Shale Gas Wells

  • Open Access


    A Loose Coupling Multiscale Approach for the Detailed Analysis of the Influence of Critical Areas on the Global Behaviour of Composite Structures

    D. Chrupalla1, J. Kreikemeier1, S. Berg2, L. Kärger3, M. Doreille4, T. Ludwig4, E. Jansen2, R. Rolfes2, A.Kling1

    CMC-Computers, Materials & Continua, Vol.32, No.3, pp. 159-176, 2012, DOI:10.3970/cmc.2012.032.159

    Abstract In this paper, a loose coupling multiscale modeling technique for the detailed numerical analysis of critical areas in composite structures is presented. It is used to describe the global (macroscopic) behaviour of composite structures taking into account the effects of local phenomena. This is done by indirectly connecting the global and local FE-models. Prescribed displacements are assigned to the local boundaries in the transition from the global to local modeling level. The local-to-global transition is realized by assigning averaged local stresses to the respective global Gauss points and by updating the global tangent stiffness operator. More >

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