文档介绍：Excerpt from the Proceedings of SOL Users Conference 2006 Boston
Pore Scale Modeling of Colloid Transport in Unsaturated Porous
Media SOL
M. Ekrem Cakmak1, Yuniati Zevi1, Verónica L. Morales1, Bin Gao1, John L. Nieber2 and Tammo
S. Steenhuis*, 1
1Department of Biological and Environmental Engineering, Cornell University, Ithaca, NY, USA
2Department of Bioproducts and Biosystems Engineering, University of Minnesota, St Paul, MN,
USA
*Corresponding author: Cornell University 206 Riley-Robb Hall, Ithaca, NY 14853, ******@
Abstract: COMSOL Multiphysics was used to In this SOL Multiphysics
simulate the transport of inert colloidal particles was used to simulate colloid movement for
at the pore scale within an unsaturated unsaturated conditions within a micromodel
micromodel consisting of sand grains and air consisting of sand grains and air bubbles trapped
bubbles. The unsaturated soil pore was modeled in the center of pores. The two-dimensional
as four adjoining grains with an air bubble Navier-Stokes equation was solved SOL
trapped at the center. Colloids were assumed to to derive the steady-state fluid velocity
behave passively in the flow field since mass distribution within an unsaturated micromodel.
effects, size effects, and interfacial forces were The transport of colloids in the unsaturated pores
not considered in th