Coupled Flow Modelling in Geotechnical and Ground Engineering: An Overview
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(2020) 6:39
STATE OF THE ART/PRACTICE PAPER
Coupled Flow Modelling in Geotechnical and Ground Engineering: An Overview Ahmed Ibrahim1 · Mohamed A. Meguid1 Received: 19 May 2020 / Accepted: 5 August 2020 © Springer Nature Switzerland AG 2020
Abstract 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. Keywords Flow modelling · Ground engineering · Multiscale modelling · Two-fluid model · Particulate flow · Computational fluid dynamics · Discrete element analysis
Introduction The flow of fluids in particulate media and flow of particle–fluid mixtures are interesting problems and relevant to several industries (e.g., pharmaceutical, chemical, civil, and mining). Understanding the mechanics of these phenomena is critical to solving important engineering problems (e.g., debris flow, soil erosion, liquefaction, and landslides) [1]. Aided by rapid advances in computational resources, coupled flow modelling, hereafter referred to as particulate flow, has significantly developed over the past few decades. The existing state-of-the-art models allow for capturing the detailed characteristics of the flow regime such as particle–particle and particle–fluid interactions. Despite the * Mohamed A. Meguid [email protected] Ahmed Ibrahim [email protected] 1
Department of Civil Engineering and Applied Mechanics, McGill University, Montreal, QC H3A 0C3, Canada
advances in computational power and algorithms, the simulation of industrial and phenomenological scale problems requires more computational resources than those available for most of engineers and researchers. Various particle upscaling techniques have been developed
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