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首页> 外文期刊>Transport in Porous Media >A Novel Method for Streamline-Based Tortuosity Calculation and Investigation of Obstacles Shape Effect on Tortuosity in Porous Media with Random Elliptical Obstacles Using Lattice Boltzmann Method
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A Novel Method for Streamline-Based Tortuosity Calculation and Investigation of Obstacles Shape Effect on Tortuosity in Porous Media with Random Elliptical Obstacles Using Lattice Boltzmann Method

机译：一种新的流基曲折计算和晶体介质曲折型曲面玻璃晶体曲线曲线曲线造成障碍造成障碍造成曲折的研究

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In this research, the lattice Boltzmann method was used to simulate the fluid flow in the random elliptical porous media. Since the tortuosity is one of the most important parameters of porous media and also, the hydraulic tortuosity is more accurate and more realistic than geometric tortuosity, therefore, the hydraulic tortuosity was discussed thoroughly in this study. Contrary to many studies in which the velocity-based method has been used for calculation of tortuosity, one of the novelties in this paper is the application of streamline-based tortuosity including the detailed description of mathematical method for calculation of streamline-based tortuosity and also, the calculation of it numerically and the comparison with velocity-based tortuosity at different porosities and at various aspect ratios. Furthermore, the deviation percentage of velocity-based tortuosity from streamline-based tortuosity was surveyed and depicted. Also, the behavior of streamline-based tortuosity was illustrated as a function of porosity at different aspect ratios and the results were compared with Comiti-Renaud equation and a new equation was proposed. With the structure factor defined as the ratio of porosity to tortuosity, the variation of this quantity with respect to porosity was displayed at different aspect ratios. Also, the formation factor variation versus porosity was discussed at different aspect ratios, too. Finally, the influence of obstacles shape on the tortuosity by varying aspect ratio was investigated and it was concluded that the orientation of elliptical obstacles (vertically or horizontally) has severe effect on the tortuosity.[GRAPHICS].
机译：在该研究中，使用格子玻璃晶晶晶晶片方法来模拟随机椭圆形多孔介质中的流体流动。由于曲折性是多孔介质的最重要参数之一，而且，液压曲折优于几何曲折性更准确，更现实，因此，在本研究中彻底讨论了液压曲折。与许多研究相反，其中基于速度的方法用于计算曲折的计算，本文中的一个新奇是基于流的曲折的应用，包括计算基于流线的曲折的数学方法的详细描述。 ，在数值上计算它以及与不同孔隙率的速度曲率和各种纵横比的比较。此外，调查和描绘了基于流基曲折的速度曲折曲折曲折的偏差百分比。而且，基于流线的曲纹的行为被示出为不同纵横比在不同纵横比中的函数，并将结果与​​Comit-Renaud方程进行了比较，提出了一种新的等式。利用结构因子定义为孔隙率与曲折性的比率，在不同纵横比下显示该量相对于孔隙率的变化。而且，在不同纵横比中讨论了形成因子变异与孔隙率。最后，研究了障碍物对曲折化曲折的影响，通过不同的宽高比来得出结论，椭圆形障碍（垂直或水平）对曲折性具有严重影响。[图形]。

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