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논문 기본 정보

자료유형
학술저널
저자정보
Sruthi, K.V. (Groundwater Department, Korea Institute of Geoscience and Mineral Resources) Suk, Heejun (Groundwater Department, Korea Institute of Geoscience and Mineral Resources) Lakshmanan, Elango (Department of Geology, Anna University) Chae, Byung-Gon (Groundwater Department, Korea Institute of Geoscience and Mineral Resources) Kim, Hyun-su (Department of Earth and Environmental Sciences, Chonbuk National University)
저널정보
한국지하수토양환경학회 지하수토양환경 지하수토양환경 제20권 제2호
발행연도
2015.1
수록면
10 - 21 (12page)

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The present study introduces a novel numerical approach for solving dispersion dominated problems with Cauchy boundary condition in an Eulerian-Lagrangian scheme. The study reveals the incapability of traditional Neuman approach to address the dispersion dominated problems with Cauchy boundary condition, even though it can produce reliable solution in the advection dominated regime. Also, the proposed numerical approach is applied to a real field problem of radioactive contaminant migration from radioactive waste repository which is a major current waste management issue. The performance of the proposed numerical approach is evaluated by comparing the results with numerical solutions of traditional FDM (Finite Difference Method), Neuman approach, and the analytical solution. The results show that the proposed numerical approach yields better and reliable solution for dispersion dominated regime, specifically for Peclet Numbers of less than 0.1. The proposed numerical approach is validated by applying to a real field problem of radioactive contaminant migration from radioactive waste repository of varying Peclet Number from 0.003 to 34.5. The numerical results of Neuman approach overestimates the concentration value with an order of 100 than the proposed approach during the assessment of radioactive contaminant transport from nuclear waste repository. The overestimation of concentration value could be due to the assumption that dispersion is negligible. Also our application problem confirms the existence of real field situation with advection dominated condition and dispersion dominated condition simultaneously as well as the significance or advantage of the proposed approach in the real field problem.

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