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Gas transport law in inorganic nanopores considering the influence of cross section shape and roughness

Author

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  • Yang, Shanshan
  • Wang, Mengying
  • Zou, Mingqing
  • Sheng, Qiong
  • Cui, Ruike
  • Chen, Shuaiyin

Abstract

To study the gas transport characteristics in rough inorganic nanopores, the effective pore size models of circular and rectangular nanopores are established, considering the influence of the adsorption water film, rock surface roughness, effective stress and the shape of the nanopore section. On this basis, the gas flow patterns are coupled, and the gas transport models in circular and rectangular rough nanopore are established respectively. The effectiveness of this model is verified by comparing it with experimental data and other scholars' models. At the same time, the effects of roughness, cross-sectional shape, cross-sectional aspect ratio, and humidity on gas migration are analyzed. The results indicate that regardless of the cross-sectional shape, an increase in roughness will lead to varying degrees of reduction in the apparent permeability of micro and nano pores. When the pressure is small, the influence of roughness on the gas permeability of rectangular cross-section nanopores is greater than that of circular cross-section nanopores. As the pressure increases, the influence of roughness on the gas permeability of rectangular and circular cross-section nanopores tends to be the same. The influence of roughness on the water saturation of rectangular cross-section nanopores is less than that on circular cross-section nanopores.

Suggested Citation

  • Yang, Shanshan & Wang, Mengying & Zou, Mingqing & Sheng, Qiong & Cui, Ruike & Chen, Shuaiyin, 2023. "Gas transport law in inorganic nanopores considering the influence of cross section shape and roughness," Chaos, Solitons & Fractals, Elsevier, vol. 175(P2).
    • Handle: RePEc:eee:chsofr:v:175:y:2023:i:p2:s0960077923009542
    DOI: 10.1016/j.chaos.2023.114053
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    References listed on IDEAS

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    1. Shuang Yi & Sheng Zheng & Shanshan Yang & Guangrong Zhou, 2022. "Fractal Analysis Of Stokes Flow In Tortuous Microchannels With Hydraulically Rough Surfaces," FRACTALS (fractals), World Scientific Publishing Co. Pte. Ltd., vol. 30(09), pages 1-16, December.
    2. Yang, Shanshan & Wang, Mengying & Zou, Mingqing & Sheng, Qiong & Cui, Ruike & Chen, Shuaiyin, 2023. "Permeability coupling model of multiple migration mechanisms in rough micro-fractures of shales," Chaos, Solitons & Fractals, Elsevier, vol. 174(C).
    3. Fang, Fang & Babadagli, Tayfun, 2017. "Dynamics of diffusive and convective transport in porous media: A fractal analysis of 3-D images obtained by laser technology," Chaos, Solitons & Fractals, Elsevier, vol. 95(C), pages 1-13.
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    5. Boqi Xiao & Qiwen Huang & Hanxin Chen & Xubing Chen & Gongbo Long, 2021. "A Fractal Model For Capillary Flow Through A Single Tortuous Capillary With Roughened Surfaces In Fibrous Porous Media," FRACTALS (fractals), World Scientific Publishing Co. Pte. Ltd., vol. 29(01), pages 1-10, February.
    6. Kang-Le Wang, 2023. "NEW SOLITARY WAVE SOLUTIONS OF THE FRACTIONAL MODIFIED KdV–KADOMTSEV–PETVIASHVILI EQUATION," FRACTALS (fractals), World Scientific Publishing Co. Pte. Ltd., vol. 31(03), pages 1-12.
    7. Shanshan Yang, 2021. "Fractal Study On The Heat Transfer Characteristics In The Rough Microchannels," FRACTALS (fractals), World Scientific Publishing Co. Pte. Ltd., vol. 29(05), pages 1-11, August.
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