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  • Open Access

    PROCEEDINGS

    Simulation of Temporary Plugging Agent Flow State in Fractures of Hot Dry Rock Considering Environmental Changes

    Zongze Li1, Zirui Yang2, Yue Wu3, Chunming He4, Bo Yu2, Daobing Wang2,*, Yueshe Wang1,*

    The International Conference on Computational & Experimental Engineering and Sciences, Vol.30, No.1, pp. 1-4, 2024, DOI:10.32604/icces.2024.012090

    Abstract Geothermal energy is an important renewable energy source, where hot dry rock (HDR) constitutes the primary component, accounting for approximately 90% of the resource. Therefore, the establishment of an efficient HDR geothermal utilization system is a core issue in geothermal resource development. Hydraulic fracturing (HF) technology serves as a crucial means aimed at enhancing the complexity of underground fracture networks and increasing heat exchange efficiency, thus improving the performance of HDR geothermal utilization systems. However, the fracture structure formed by conventional HF techniques is relatively simple, resulting in limited heat exchange areas. Hence, the temporary… More >

  • Open Access

    ARTICLE

    Experimental and Numerical Analysis of Particle Migration and Patterning Behavior in a Gravel Pack

    Bobo Luo1,*, Yunbin Xiong1, Zhuoyi Li2, Zhanqing Qu3, Fenggang Liu1, Tiankui Guo3, Zugui Yang1, Yina Shi1

    FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.4, pp. 911-928, 2023, DOI:10.32604/fdmp.2022.022761 - 02 November 2022

    Abstract Due to its long lifespan and high sand-removal efficiency, gravel packing is one of the most applied sand control methods during the recovery of reservoirs with sanding problems. The blockage and retention of injected sand in a gravel pack is a complex process affected by multiple mechanisms. The majority of existing studies based on the phenomenological deep bed filtration (DBF) theory focused on the gravel pack’s overall permeability damage and failed to obtain the inner-pore particle distribution pattern. In this work, experiments and simulations were carried out to reveal the particle distribution in a gravel More >

  • Open Access

    ARTICLE

    Numerical study on seepage property of karst collapse columns under particle migration

    Banghua Yao1,2, Jianping Wei1, Dengke Wang1, Dan Ma2,3, Zhanqing Chen2

    CMES-Computer Modeling in Engineering & Sciences, Vol.91, No.2, pp. 81-100, 2013, DOI:10.3970/cmes.2013.091.081

    Abstract Presently, there is an increasing number of water outburst accidents in China as mining activity continues to develop to deeper ground. In these accidents, water outburst caused by karst collapse columns often results in serious damage, involving both the loss of lives and significant economic loss. Therefore, it is of utmost importance to study the seepage property and water outburst mechanism of karst collapse columns. In this paper, based on the seepage theory and the groundwater dynamic theory of porous media, a fluid-solid coupling model for karst collapse columns was built and then imported into… More >

  • Open Access

    ARTICLE

    A Computational Approach to Estimating a Lubricating Layer in Concrete Pumping

    Seon Doo Jo1, Chan Kyu Park2, Jae Hong Jeong2, Seung Hoon Lee2, Seung Hee Kwon3

    CMC-Computers, Materials & Continua, Vol.27, No.3, pp. 189-210, 2012, DOI:10.3970/cmc.2011.027.189

    Abstract When concrete is being pumped, a lubricating layer forms at the interface of the inner concrete and the wall of the pipe. The lubricating layer is one of the most dominant factors in determining the pumping capability, yet no study has endeavored to quantitatively estimate the thickness and rheological properties of the layer. Recently, there has been a growing demand for large-scale construction under extreme conditions, such as high-rise buildings and super-long span bridges. This demand has heightened the need for more accurate predictions of pumpability.
    A possible mechanism that contributes to the formation of the More >

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