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solute removal Analysis of a Large-Scale Fracture Plane Considering Different Flow Paths and Different Hydraulic Head Differences

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Computer Modeling in Engineering & Sciences 2020年第7期124卷 345-373页

作者： Qian Yin Xiaojing Li Liyuan Yu Ming He Richeng Liu State Key Laboratory for Geomechanics&Deep Underground Engineering China University of Mining and TechnologyXuzhou221116China School of Engineering Nagasaki UniversityNagasakiJapan School of Civil Engineering Shandong Jianzhu UniversityJinan116024China

An experimental and numerical study was carried out to investigate the solute removal process through a large-scale fracture plane considering different flow paths and hydraulic head *** visualization techniques were utilized in the experiment to capture the removal process images,which were then transferred to binary *** variations in dimensionless concentration,which is defined as saturation of solute phase,were *** increasing hydraulic head difference,the speed of solute removal increases and the dimensionless concentration *** flow paths result in different solute distribution patterns and different mechanisms for solute removal such as advection and diffusion,thus the curves of dimensionless concentration versus time are *** dimensionless concentration over time decreases from approximately 1,which is smaller than 1 due to the existence of bubbles,to approximately 0,which is larger than 0 because the folds of the background are dealt as“solute”.A significant longer time is needed to achieve a certain fixed dimensionless concentration for a smaller hydraulic head *** the finite element software COMSOL multiphysics,the solute removal process,flow velocity fields,flow streamlines,as well as the hydraulic pressure fields were analyzed,which shows a good consistency with the experimental *** practical engineering,when the solute pollutes the underground environment,the removal ability can be more significantly enforced by immediately applying a larger hydraulic head difference along a longer distance between the inlet and outlet boundaries.

关键词： solute removal rock fracture visualization hydraulic head difference

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