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Pore scale study of permeability and tortuosity for flow through particulate media using Lattice Boltzmann method

Ghassemi, A ; Sharif University of Technology | 2011

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  1. Type of Document: Article
  2. DOI: 10.1002/nag.932
  3. Publisher: 2011
  4. Abstract:
  5. In this paper, Lattice Boltzmann method (LBM) has been used to study the effects of permeability and tortuosity on flow through saturated particulate media and identify the relationships between permeability and tortuosity with other parameters such as particles diameter, grain specific surface, and porosity. LBM is a simple kinematic model that can incorporate the essential physics of microscopic and mesoscopic processes involved in flow through granular soils. The obtained results indicate that the 2D LB model, due to its inherent theoretical advantages, is capable of demonstrating that the porosity and specific surface are the most influential parameters in determining the intrinsic permeability of granular media. The obtained results show that particles' size diameter has a two-fold effect on the coefficient of permeability: one is through specific surface and the other is by tortuosity factor. Numerical study also reveals that tortuosity of granular soils decreases almost linearly with increasing the porosity
  6. Keywords:
  7. Lattice Boltzmann method ; Tortuosity ; Coefficient of permeability ; Discrete element method ; Flowthrough ; Granular media ; Granular soils ; Intrinsic permeability ; Kinematic model ; Lattice Boltzmann method ; Mesoscopic process ; Numerical studies ; On flow ; Particulate media ; Pore scale ; Specific surface ; Tortuosity factor ; Geologic models ; Kinematics ; Porosity ; Two dimensional ; Mechanical permeability ; computational fluid dynamics ; grain size ; granular medium ; numerical method ; particle size ; permeability ; soil water
  8. Source: International Journal for Numerical and Analytical Methods in Geomechanics ; Volume 35, Issue 8 , 2011 , Pages 886-901 ; 03639061 (ISSN)
  9. URL: http://onlinelibrary.wiley.com/doi/10.1002/nag.932/abstract;jsessionid=9BCE5E1919BCDF23DB8460BE0D215F0F.f03t03