Visualizing complex pore structure and fluid flow in porous media using 3D printing technology and LBM simulation |
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| Authors: | TONG Shao-qing DONG Yan-hui ZHANG Qian SONG Fan |
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| Institution: | 1Key Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China. 2University of Chinese Academy of Sciences, Beijing 100049, China. 3Bureau of Hydrology (Center of Water Resources Information), The Ministry of Water Resources of the People’s Republic of China, Beijing 100053, China. 4Groundwater Monitoring Center, the Ministry of Water Resources of the People’s Republic of China, Beijing 100053, China. |
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| Abstract: | Pore structures of porous media and properties of fluid flow are key factors for the study of non-Darcy groundwater flow. However, it is difficult to directly observe pore structures and flow properties, resulting in a “black box” problem of porous media. This problem has hindered the in-depth study of the groundwater flow mechanism at the pore scale. In recent years, 3D rapid prototyping technology has seen tremendous development. 3D printing provides digital models and printing models of porous media with clear internal structure. Thus, Lattice Boltzmann Method can be used to simulate the flow processes at the pore scale based on real pore structures. In this study, 3D printing cores and Lattice Boltzmann Method were coupled to conduct both laboratory and numerical experiments in spherical porous media with different sphere diameters and periodic arrays. The LBM simulation results show a good agreement with laboratory experimental results. With the advantages of LBM and 3D printing, this approach provides a visualization of the complex pore structure and fluid flow in pores, which is a promising method for studies of non-Darcy groundwater flow at the pore scale. |
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| Keywords: | 3D printing Pore structure LBM Visualization |
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