Title

Research Challenges Involving Coupled Flows in Geotechnical Engineering

Document Type

Contribution to Book

Source Publication

Geotechnical Fundamentals for Addressing New World Challenges

Publication Date

Fall 2019

Editor

Ning Lu and James K. Mitchell

Publisher

Springer

City

Cham, Switzerland

ISBN

978303006249-1

First Page

237

Last Page

274

Department

Civil and Environmental Engineering

Description

Coupled fluid, chemical, heat, and electrical flows are common phenomena that arc relevant to a wide variety of applications in Geotechnical Engineering, including the use of engineered clay barriers for waste containment, electro-osmosis for soil consolidation, highly compacted bentonite buffers for high-level radioactive nuclear waste disposal, and electrokinetics for soil contaminant removal. among others. For all of these applications, a fundamental understanding of coupled flow phenomena is required, including the basis of the various phenomena. the potential effect of the phenomena on fundamental soil behavior, and the applicability of the phenomena in both natural and built environments. This chapter highlights some of the advances over the past approximate three decades, including the effects of osmotic phenomena (chemico-osmosis, electro-osmosis, and thermo-osmosis) on the mechanical behavior of clays, the formulations and measurement of coupled flow phenomena, the distinction between phenomenological and microscopic (physical-based) formalisms, and considerations with respect to both saturated and unsaturated soil conditions. Based on the description of these advances, research challenges pertaining lo the study of coupled flow phenomena for Geotechnical Engineering applications are identified.

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