Three-dimensional microscale flow simulation and colloid transport modeling in saturated soil porous media
نویسندگان
چکیده
Transport of sub-micron colloid particles in soil porous media has been mostly studied numerically with unit-cell-based grain-scale geometries. In this study, we develop a more general approach by combining a multiple-grain pore-scale flow simulation with Lagrangian tracking of individual colloids. First, two numerical methods are applied simultaneously to solve viscous flows in a channel partially or fully packed with spherical grain particles, this allows cross-validation of the numerical methods for consideredmodel geometries. It is demonstrated that the mesoscopic lattice Boltzmann approach can more accurately simulate three-dimensional pore-scale flows with multiple grain–grain and grain–wall contact points. Colloid transport is simulated under the combined influence of hydrodynamic forces, Brownian force, and physicochemical forces. Preliminary results demonstrate the capture of colloids by the secondary energy minimum (SEM) well. The local hydrodynamic retardation is shown to reduce the ability for colloids to move into the SEM well, but does not prevent this. Trajectories before and after the capture are also discussed. © 2009 Elsevier Ltd. All rights reserved.
منابع مشابه
Modelling microscale flow and colloid transport in saturated porous media
International Journal of Computational Fluid Dynamics Publication details, including instructions for authors and subscription information: http://www.informaworld.com/smpp/title~content=t713455064 Modelling microscale flow and colloid transport in saturated porous media Hui Gao a; Jie Han b; Yan Jin b; Lian-Ping Wang a a Department of Mechanical Engineering, University of Delaware, Newark, DE,...
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ورودعنوان ژورنال:
- Computers & Mathematics with Applications
دوره 59 شماره
صفحات -
تاریخ انتشار 2010