基于微观连续介质模型的反应溶质运移数值模拟方法  

Numerical simulation method for reactive solute transport based on micro-continuum medium model

作　　者：张倩[1,2,3] 董艳辉[1,2,3] ZHANG Qian;DONG Yanhui(Key Laboratory of Shale Gas and Geoengineering,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China;Innovation Academy of Earth Science,Chinese Academy of Sciences,Beijing 100029,China;College of Earth and Planetary Science,University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院地质与地球物理研究所,中国科学院页岩气与地质工程重点实验室,北京100029 [2]中国科学院地球科学研究院,北京100029 [3]中国科学院大学,地球与行星科学学院,北京100049

出　　处：《地质科技通报》2024年第3期289-300,共12页Bulletin of Geological Science and Technology

基　　金：国家自然青年科学基金项目(42202285)。

摘　　要：地下环境中流固间的反应溶质运移过程控制着地质介质演化规律,并受岩石固有非均质性的影响,衍生出非线性行为与多尺度效应。为了面向更为复杂化的应用需求,解析微观特征与表观行为间的响应-反馈机制成为了重要的科学与工程命题。本研究系统地介绍了微观连续介质概念与模型框架,以及该模型方法的实现方式,并归纳了其在不同研究体系中的应用实例,最后重点分析了该方法在实验-数值联合研究中的发展前景与预期挑战。数值模拟方法已被广泛应用于反应溶质运移过程的定量研究之中,但单一孔隙或达西尺度数值模型难以应对机理研究与实例应用间的时空尺度跨度。近年来多尺度数值模拟方法体系不断发展,其中将Darcy-Brinkman-Stokes方程作为多流态数学统一表达,以微观连续介质模型作为多尺度信息关联方式的数值模拟框架,在流固界面追踪、高效数值求解等方面展现出一定的方法优势与应用潜力。[Significance]Fluid-solid interactions in reactive solute transport processes,governed by physical and chemical heterogeneities,dictate the evolution of subsurface geomaterials,resulting in nonlinear behaviours and multiscale features.It has become increasingly evident that examining the feedback between microscopic features and macroscopic behaviours in geomaterials is critical in various academic and industrial applications.[Progress]In this study,we introduce the concept and framework,mathematical and numerical models of the micro-continuum medium,as well as multiscale solvers and applications.Challenges in co-designed simulations and experiments are also discussed.[Conclusion and Prospects]Despite offering valuable insights into reactive transport processes,continuum-scale modelling or pore-scale modelling suffers from a gap between theoretical understanding and computational prediction.Recently,an alternative conceptualization of the multiscale problem involves the implementation of the Darcy-Brinkman-Stokes(DBS)equation in a single micro-continuum domain to identify reactive transport patterns across spatial scales under changing flow regimes.As fluid-solid interfaces cannot be explicitly resolved as in pore-scale models,the micro-continuum medium approach has the advantage of accommodating complex geometries or evolving interfaces without increasing computational costs.

关 键 词：反应溶质运移 微观连续介质方法 多尺度数值模拟 机理解析 

分 类 号：P641.2[天文地球—地质矿产勘探] X143[天文地球—地质学]