| Title |
Analysis of Contaminant Transport in the Ground using the Lattice-Boltzmann Method |
| Authors |
강동훈(Kang, Dong Hun) ; 윤태섭(Yun, Tae Sup) |
| DOI |
https://doi.org/10.12652/Ksce.2012.32.6C.267 |
| Keywords |
오염물질 이동;지반오염;간극 스케일;격자 볼츠만 방법;이송-확산 방정식 contaminant transport;ground pollution;pore scale;Lattice Boltzmann method;advection-diffusion equation |
| Abstract |
The conventional approach to evaluate the contaminant transport in soils adopts the macro-scale implementation while the pore configuration and network is a dominant factor to determine the fate of contaminant. However, the observation of fate and transport at pore scale may not be readily approachable because of the computational expenses to solve Navier-Stokes equation. We herein present the 2D Lattice-Boltzmann method that enables to assess the local fluid velocity and density efficiently for the case of single phase and multi-components. The solute fate spatio-temperal space is explicitly determined by the advection of fluid flow. Two different types of idealized pore space provides the path of fluid. Also, solute transport, the velocity field and average concentration of solute are computed in steady state. Results show that the pore geometry such as tortuosity mainly affect the solute fate. It highlights the significance of the pore configuration and shape in granular soils and rock discontinuity in spite of the equivalent porosity. |