Coupled Flow Modelling in Geotechnical and Ground Engineering: An Overview
Coupled Flow Modelling in Geotechnical and Ground Engineering: An Overview
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DOI：
10.1007/s40891-020-00223-0
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发表时间：
2020-08
影响因子：
2.9
通讯作者：
A. Ibrahim;M. Meguid
中科院分区：
文献类型：
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作者：
A. Ibrahim;M. Meguid
混合颗粒介质和流体的颗粒流与几种自然现象以及工业应用有关。在岩土工程中，现有的模拟方法主要采用基于宏观的连续介质分析，该方法不能提供关于颗粒尺度上流体与颗粒介质相互作用的重要信息。另外，颗粒模型可以成为理解滑坡、泥石流和内部侵蚀等不同现象的复杂微观机制的有力工具。然而，将现有的颗粒流模型应用于实际服务于土结构设计和风险评估的规模是具有挑战性的。随着计算能力的快速发展，颗粒流模拟可以在微观和宏观尺度上提供有价值的见解。本文从多学科的角度对颗粒流模拟的不同方法进行了综述，重点介绍了岩土工程应用。此外，这项研究总结了可用于降低计算成本的技术，并强调了岩土工程中颗粒流模拟的突出挑战。这项工作应为岩土工程师和研究人员提供指导，以确定采用颗粒流模拟的适当模拟工具，并确定与每种方法相关的主要挑战。
Particulate flows of combined granular media and fluids are relevant to several natural phenomena as well as industrial applications. In geotechnical engineering, the existing modelling approaches mainly adopt a macroscopic-based continuum analysis which does not provide access to important information on the fluid flow interaction with granular media at the particle scale. Alternatively, particulate modelling can be a powerful tool in understanding the complex micro-mechanics of different phenomena such as landslide, debris flow and internal erosion. However, it is challenging to employ the existing particulate flow models on a scale that practically serves the design and risk assessment for earth structures. With rapid advances in computational power, particulate flow modelling can provide valuable insights on both the micro as well as the macro-scale levels. This paper reviews the different approaches of particulate flow modelling from a multidisciplinary perspective with emphasis on geotechnical applications. In addition, this study presents a summary of the available techniques for reducing the computational cost and highlights the outstanding challenges of particulate flow modelling in geotechnical engineering. This work should provide guidance to geotechnical engineers and researches to determine the appropriate modelling tool to approach particulate flow modelling and identify the major challenges associated with each approach.