Flow Dyanmics And Solute Transport In Unsaturated Rock Fractures

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Flow Dynamics and Solute Transport in Unsaturated Rock Fractures

Author :
Publisher :
ISBN 13 :
Total Pages : 155 pages
Book Rating : 4.:/5 (684 download)

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Book Synopsis Flow Dynamics and Solute Transport in Unsaturated Rock Fractures by :

Download or read book Flow Dynamics and Solute Transport in Unsaturated Rock Fractures written by and published by . This book was released on 1999 with total page 155 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rock fractures play an important role in flow and contaminant transport in fractured aquifers, production of oil from petroleum reservoirs, and steam generation from geothermal reservoirs. In this dissertation, phenomenological aspects of flow in unsaturated fractures were studied in visualization experiments conducted on a transparent replica of a natural, rough-walled rock fracture for inlet conditions of constant pressure and flow rate over a range of angles of inclination. The experiments demonstrated that infiltrating liquid proceeds through unsaturated rock fractures along non-uniform, localized preferential flow paths. Even in the presence of constant boundary conditions, intermittent flow was a persistent flow feature observed, where portions of the flow channel underwent cycles of snapping and reforming. Two modes of intermittent flow were observed, the pulsating blob mode and the rivulet snapping mode. A conceptual model for the rivulet snapping mode was proposed and examined using idealized, variable-aperture fractures. The frequency of intermittent flow events was measured in several experiments and related to the capillary and Bond numbers to characterize this flow behavior.

Flow Dyanmics and Solute Transport in Unsaturated Rock Fractures

Author : Grace Woan-chee Su
Publisher :
ISBN 13 :
Total Pages : 378 pages
Book Rating : 4.:/5 (34 download)

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Book Synopsis Flow Dyanmics and Solute Transport in Unsaturated Rock Fractures by : Grace Woan-chee Su

Download or read book Flow Dyanmics and Solute Transport in Unsaturated Rock Fractures written by Grace Woan-chee Su and published by . This book was released on 1999 with total page 378 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Conceptual Models of Flow and Transport in the Fractured Vadose Zone

Author : National Research Council
Publisher : National Academies Press
ISBN 13 : 0309170990
Total Pages : 398 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Conceptual Models of Flow and Transport in the Fractured Vadose Zone by : National Research Council

Download or read book Conceptual Models of Flow and Transport in the Fractured Vadose Zone written by National Research Council and published by National Academies Press. This book was released on 2001-05-21 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fluid flow and solute transport within the vadose zone, the unsaturated zone between the land surface and the water table, can be the cause of expanded plumes arising from localized contaminant sources. An understanding of vadose zone processes is, therefore, an essential prerequisite for cost-effective contaminant remediation efforts. In addition, because such features are potential avenues for rapid transport of chemicals from contamination sources to the water table, the presence of fractures and other channel-like openings in the vadose zone poses a particularly significant problem, Conceptual Models of Flow and Transport in the Fractured Vadose Zone is based on the work of a panel established under the auspices of the U.S. National Committee for Rock Mechanics. It emphasizes the importance of conceptual models and goes on to review the conceptual model development, testing, and refinement processes. The book examines fluid flow and transport mechanisms, noting the difficulty of modeling solute transport, and identifies geochemical and environmental tracer data as important components of the modeling process. Finally, the book recommends several areas for continued research.

Flow and Contaminant Transport in Fractured Rock

Author : Jacob Bear
Publisher : Academic Press
ISBN 13 : 0080916473
Total Pages : 575 pages
Book Rating : 4.0/5 (89 download)

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Book Synopsis Flow and Contaminant Transport in Fractured Rock by : Jacob Bear

Download or read book Flow and Contaminant Transport in Fractured Rock written by Jacob Bear and published by Academic Press. This book was released on 2012-12-02 with total page 575 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the past two or three decades, fractured rock domains have received increasing attention not only in reservoir engineering and hydrology, but also in connection with geological isolation of radioactive waste. Locations in both the saturated and unsaturated zones have been under consideration because such repositories are sources of heat and potential sources of groundwater contamination. Thus, in addition to the transport of mass of fluid phases in single and multiphase flow, the issues of heat transport and mass transport of components have to be addressed.

Fluid Flow in Fractured Rocks

Author : Robert W. Zimmerman
Publisher : John Wiley & Sons
ISBN 13 : 1119248027
Total Pages : 293 pages
Book Rating : 4.1/5 (192 download)

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Book Synopsis Fluid Flow in Fractured Rocks by : Robert W. Zimmerman

Download or read book Fluid Flow in Fractured Rocks written by Robert W. Zimmerman and published by John Wiley & Sons. This book was released on 2023-12-19 with total page 293 pages. Available in PDF, EPUB and Kindle. Book excerpt: FLUID FLOW IN FRACTURED ROCKS "The definitive treatise on the subject for many years to come" (Prof. Ruben Juanes, MIT) Authoritative textbook that provides a comprehensive and up-to-date introduction to fluid flow in fractured rocks Fluid Flow in Fractured Rocks provides an authoritative introduction to the topic of fluid flow through single rock fractures and fractured rock masses. This book is intended for readers with interests in hydrogeology, hydrology, water resources, structural geology, reservoir engineering, underground waste disposal, or other fields that involve the flow of fluids through fractured rock masses. Classical and established models and data are presented and carefully explained, and recent computational methodologies and results are also covered. Each chapter includes numerous graphs, schematic diagrams and field photographs, an extensive reference list, and a set of problems, thus providing a comprehensive learning experience that is both mathematically rigorous and accessible. Written by two internationally recognized leaders in the field, Fluid Flow in Fractured Rocks includes information on: Nucleation and growth of fractures in rock, with a multiscale characterization of their geometric traits Effect of normal and shear stresses on the transmissivity of a rock fracture and mathematics of fluid flow through a single rock fracture Solute transport in rocks, with quantitative descriptions of advection, molecular diffusion, and dispersion Fluid Flow in Fractured Rocks is an essential resource for researchers and postgraduate students who are interested in the field of fluid flow through fractured rocks. The text is also highly suitable for professionals working in civil, environmental, and petroleum engineering.

Characterization, Modeling, Monitoring, and Remediation of Fractured Rock

Author : National Academies of Sciences, Engineering, and Medicine
Publisher : National Academies Press
ISBN 13 : 0309373727
Total Pages : 177 pages
Book Rating : 4.3/5 (93 download)

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Book Synopsis Characterization, Modeling, Monitoring, and Remediation of Fractured Rock by : National Academies of Sciences, Engineering, and Medicine

Download or read book Characterization, Modeling, Monitoring, and Remediation of Fractured Rock written by National Academies of Sciences, Engineering, and Medicine and published by National Academies Press. This book was released on 2021-01-29 with total page 177 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fractured rock is the host or foundation for innumerable engineered structures related to energy, water, waste, and transportation. Characterizing, modeling, and monitoring fractured rock sites is critical to the functioning of those infrastructure, as well as to optimizing resource recovery and contaminant management. Characterization, Modeling, Monitoring, and Remediation of Fractured Rock examines the state of practice and state of art in the characterization of fractured rock and the chemical and biological processes related to subsurface contaminant fate and transport. This report examines new developments, knowledge, and approaches to engineering at fractured rock sites since the publication of the 1996 National Research Council report Rock Fractures and Fluid Flow: Contemporary Understanding and Fluid Flow. Fundamental understanding of the physical nature of fractured rock has changed little since 1996, but many new characterization tools have been developed, and there is now greater appreciation for the importance of chemical and biological processes that can occur in the fractured rock environment. The findings of Characterization, Modeling, Monitoring, and Remediation of Fractured Rock can be applied to all types of engineered infrastructure, but especially to engineered repositories for buried or stored waste and to fractured rock sites that have been contaminated as a result of past disposal or other practices. The recommendations of this report are intended to help the practitioner, researcher, and decision maker take a more interdisciplinary approach to engineering in the fractured rock environment. This report describes how existing tools-some only recently developed-can be used to increase the accuracy and reliability of engineering design and management given the interacting forces of nature. With an interdisciplinary approach, it is possible to conceptualize and model the fractured rock environment with acceptable levels of uncertainty and reliability, and to design systems that maximize remediation and long-term performance. Better scientific understanding could inform regulations, policies, and implementation guidelines related to infrastructure development and operations. The recommendations for research and applications to enhance practice of this book make it a valuable resource for students and practitioners in this field.

Physical Processes that Control Droplet Transport in Rock Fracture Systems

Author : Katrina Moran Hay
Publisher :
ISBN 13 :
Total Pages : 248 pages
Book Rating : 4.:/5 (229 download)

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Book Synopsis Physical Processes that Control Droplet Transport in Rock Fracture Systems by : Katrina Moran Hay

Download or read book Physical Processes that Control Droplet Transport in Rock Fracture Systems written by Katrina Moran Hay and published by . This book was released on 2008 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aquifer recharge is generally driven by fluids that move from the Earth's surface to groundwater through the unsaturated zone, also known as the vadose zone. When the vadose zone is fractured, fluids, which may include contaminants, can move through the fracture network as well as the porous matrix. Such a network of fractures can provide a more rapid path, thereby reducing contact time between the fluid and the matrix. Contact time allows for exchange of solutes between the fluid and the porous matrix, thus being able to quantify contact time is important. In addition, the behavior of fluids within a fracture network has been found to be very complex; large-scale models are yet not able to predict transport paths or flux rates. Because, small-scale flow phenomena can strongly influence the large-scale behavior of fluid movement through systems of fractures, it is important that small-scale dynamics be properly understood in order to improve our predictive capabilities in these complex systems. Relevant flow dynamics includes the impact of boundary conditions, fluid modes that evolve in time and space and transitions between modes. This thesis presents three investigations aimed at understanding the physical processes governing fluid movement in unsaturated fractures, with the ultimate goal of improving predictive relationships for fluid transport in rock fracture systems. These investigations include a theoretical analysis of the wetting of a rough surface, an experimental study of the dynamics of fluid droplets (or liquid bridges) moving in a single fracture and a theoretical analysis of the movement of a fluid droplet encountering a fracture intersection. Each investigation is motivated by environmental applications. Development of an analytical equation for the wetting of a rough surface is based on a balance between capillary forces and frictional resistive forces. The resulting equation predicts movement of the liquid invasion front driven solely by the surface roughness; the relationship was found to exhibit a square root of time dependence. Rough surfaces also affect the movement of bulk fluid through the fractures. The speed of droplets moving downward between smooth and rough surfaces is seen to be significantly different. Experiments were used to develop predictive algorithms to calculate the speed of droplets in unsaturated rock fractures, which incorporate an adjusted contact angle for wet rough surfaces, and also incorporate the effect of dynamics on the evolution of the advancing contact angle. The third paper investigates the effect of intersection geometry on the larger scale distribution of fluid in a system of fractures. Fluid movement through fracture intersections depends on input flow parameters, geometry of the system, and capillary and gravitational forces. The physical mechanisms governing the process are analyzed to predict distribution of liquid into fracture branches and velocity of the output flow. This study will improve the ability to incorporate pore-scale fluid physics phenomena into large-scale models for predicting flow transport in rock fracture systems.

Rock Fractures and Fluid Flow

Author : Committee on Fracture Characterization and Fluid Flow
Publisher : National Academies Press
ISBN 13 : 0309563488
Total Pages : 568 pages
Book Rating : 4.3/5 (95 download)

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Book Synopsis Rock Fractures and Fluid Flow by : Committee on Fracture Characterization and Fluid Flow

Download or read book Rock Fractures and Fluid Flow written by Committee on Fracture Characterization and Fluid Flow and published by National Academies Press. This book was released on 1996-09-10 with total page 568 pages. Available in PDF, EPUB and Kindle. Book excerpt: Scientific understanding of fluid flow in rock fractures--a process underlying contemporary earth science problems from the search for petroleum to the controversy over nuclear waste storage--has grown significantly in the past 20 years. This volume presents a comprehensive report on the state of the field, with an interdisciplinary viewpoint, case studies of fracture sites, illustrations, conclusions, and research recommendations. The book addresses these questions: How can fractures that are significant hydraulic conductors be identified, located, and characterized? How do flow and transport occur in fracture systems? How can changes in fracture systems be predicted and controlled? Among other topics, the committee provides a geomechanical understanding of fracture formation, reviews methods for detecting subsurface fractures, and looks at the use of hydraulic and tracer tests to investigate fluid flow. The volume examines the state of conceptual and mathematical modeling, and it provides a useful framework for understanding the complexity of fracture changes that occur during fluid pumping and other engineering practices. With a practical and multidisciplinary outlook, this volume will be welcomed by geologists, petroleum geologists, geoengineers, geophysicists, hydrologists, researchers, educators and students in these fields, and public officials involved in geological projects.

Mass Transfer Dynamics of Contaminants in Fractured Media

Author : Zhi Dou
Publisher : Springer Nature
ISBN 13 : 9819991870
Total Pages : 210 pages
Book Rating : 4.8/5 (199 download)

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Book Synopsis Mass Transfer Dynamics of Contaminants in Fractured Media by : Zhi Dou

Download or read book Mass Transfer Dynamics of Contaminants in Fractured Media written by Zhi Dou and published by Springer Nature. This book was released on with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Fluid Dynamics in Complex Fractured-Porous Systems

Author : Boris Faybishenko
Publisher : John Wiley & Sons
ISBN 13 : 1118877225
Total Pages : 262 pages
Book Rating : 4.1/5 (188 download)

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Book Synopsis Fluid Dynamics in Complex Fractured-Porous Systems by : Boris Faybishenko

Download or read book Fluid Dynamics in Complex Fractured-Porous Systems written by Boris Faybishenko and published by John Wiley & Sons. This book was released on 2015-06-15 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt: Despite of many years of studies, predicting fluid flow, heat, and chemical transport in fractured-porous media remains a challenge for scientists and engineers worldwide. This monograph is the third in a series on the dynamics of fluids and transport in fractured rock published by the American Geophysical Union (Geophysical Monograph Series, Vol. 162, 2005; and Geophysical Monograph, No. 122, 2000). This monograph is dedicated to the late Dr. Paul Witherspoon for his seminal influence on the development of ideas and methodologies and the birth of contemporary fractured rock hydrogeology, including such fundamental and applied problems as environmental remediation; exploitation of oil, gas, and geothermal resources; disposal of spent nuclear fuel; and geotechnical engineering. This monograph addresses fundamental and applied scientific questions and is intended to assist scientists and practitioners bridge gaps in the current scientific knowledge in the areas of theoretical fluids dynamics, field measurements, and experiments for different practical applications. Readers of this book will include researchers, engineers, and professionals within academia, Federal agencies, and industry, as well as graduate/undergraduate students involved in theoretical, experimental, and numerical modeling studies of fluid dynamics and reactive chemical transport in the unsaturated and saturated zones, including studies pertaining to petroleum and geothermal reservoirs, environmental management and remediation, mining, gas storage, and radioactive waste isolation in underground repositories. Volume highlights include discussions of the following: Fundamentals of using a complex systems approach to describe flow and transport in fractured-porous media. Methods of Field Measurements and Experiments Collective behavior and emergent properties of complex fractured rock systems Connection to the surrounding environment Multi-disciplinary research for different applications

Fluid Flow and Solute Transport Modeling Through Three-dimensional Networks of Variably Saturated Discrete Fractures

Author : Todd C. Rasmussen
Publisher :
ISBN 13 :
Total Pages : 193 pages
Book Rating : 4.:/5 (198 download)

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Book Synopsis Fluid Flow and Solute Transport Modeling Through Three-dimensional Networks of Variably Saturated Discrete Fractures by : Todd C. Rasmussen

Download or read book Fluid Flow and Solute Transport Modeling Through Three-dimensional Networks of Variably Saturated Discrete Fractures written by Todd C. Rasmussen and published by . This book was released on 1989 with total page 193 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Flow and Transport Through Unsaturated Fractured Rock

Author : Daniel D. Evans
Publisher : American Geophysical Union
ISBN 13 :
Total Pages : 212 pages
Book Rating : 4.:/5 (318 download)

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Book Synopsis Flow and Transport Through Unsaturated Fractured Rock by : Daniel D. Evans

Download or read book Flow and Transport Through Unsaturated Fractured Rock written by Daniel D. Evans and published by American Geophysical Union. This book was released on 2001-01-09 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt: Published by the American Geophysical Union as part of the Geophysical Monograph Series, Volume 42. This monograph is an update and revision of the first edition, Geophysical Monograph 42, on ground-water flow and transport through unsaturated, fractured rock, published by AGU in 1987. The first edition evolved from a special symposium held during the American Geophysical Union fall meetings in San Francisco in December 1986. Invited and contributed papers at that AGU session, as well as panel presentations, focused on conceptualizing, measuring and modeling flow and transport through unsaturated fractured rock. As noted in the preface to the first edition, "the expanded interest in the topic (water flow and contaminant transport through unsaturated fractured rock) was initiated when the U.S. Geological Survey proposed that deep unsaturated zones in arid regions be considered in the site selection for the first high-level, commercially generated radioactive waste repository." Much of the research reported in that first edition was motivated by the U.S. Department of Energy's program to investigate Yucca Mountain at the Nevada Test Site as a possible geologic repository for commercially generated, high-level radioactive waste. As noted in the overview paper of the first edition, "characterization methods and modeling are in their developmental stage with the greatest lack of knowledge being the interaction between fracture and matrix flow and transport properties." Although the first edition of this monograph reflected the state-of-the science, laboratory and field experimental programs were novel and limited and, in general, followed from the principles and methods developed in the soil science community.

Flow and Transport Through Unsaturated Fractured Rock

Author : Daniel D. Evans
Publisher : American Geophysical Union
ISBN 13 : 0875900690
Total Pages : 201 pages
Book Rating : 4.8/5 (759 download)

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Book Synopsis Flow and Transport Through Unsaturated Fractured Rock by : Daniel D. Evans

Download or read book Flow and Transport Through Unsaturated Fractured Rock written by Daniel D. Evans and published by American Geophysical Union. This book was released on 1987 with total page 201 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Stochastic Analysis of Flow and Solute Transport in a Variable-aperture Rock Fracture

Author : David M. Brown
Publisher :
ISBN 13 :
Total Pages : 140 pages
Book Rating : 4.:/5 (126 download)

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Book Synopsis Stochastic Analysis of Flow and Solute Transport in a Variable-aperture Rock Fracture by : David M. Brown

Download or read book Stochastic Analysis of Flow and Solute Transport in a Variable-aperture Rock Fracture written by David M. Brown and published by . This book was released on 1984 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Dynamics of Fluids in Fractured Rock

Author : Boris Faybishenko
Publisher : American Geophysical Union
ISBN 13 :
Total Pages : 422 pages
Book Rating : 4.:/5 (318 download)

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Book Synopsis Dynamics of Fluids in Fractured Rock by : Boris Faybishenko

Download or read book Dynamics of Fluids in Fractured Rock written by Boris Faybishenko and published by American Geophysical Union. This book was released on 2000-01-10 with total page 422 pages. Available in PDF, EPUB and Kindle. Book excerpt: Published by the American Geophysical Union as part of the Geophysical Monograph Series, Volume 122. Among the current problems that hydrogeologists face, perhaps there is none as challenging as the characterization of fractured rock. Within hydrogeological systems, general issues concerning groundwater flow and environmental remediation cannot be resolved in any practical manner prior to investigating the nature and vagaries of the fracture networks themselves. Comparable difficulties arise when developing economic programs for the exploitation of oil, gas, and geothermal reservoirs in fractured rock. Equal, if not greater, difficulties have commanded our attention relatively recently in regard to the storing of spent fuel generated by nuclear power plants. For example, if we are to isolate spent nuclear fuel in underground rock systems, we must construct a repository to protect the biosphere from contamination by radioactivity while subjecting the total rock system to a significant thermal field for many thousands of years. Predicting the behavior of a waste repository under such conditions, especially in fractured rock, is a formidable task.

Dynamic Fluids and Transport in Fractured Rock

Author : Boris Faybishenko
Publisher : American Geophysical Union
ISBN 13 :
Total Pages : 232 pages
Book Rating : 4.:/5 (318 download)

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Book Synopsis Dynamic Fluids and Transport in Fractured Rock by : Boris Faybishenko

Download or read book Dynamic Fluids and Transport in Fractured Rock written by Boris Faybishenko and published by American Geophysical Union. This book was released on 2005-01-14 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive review and analysis of recent field, laboratory, and modeling investigations of flow and transport through fractured rock worldwide. Topics include recent advances in modeling, unsaturated flow and transport processes, field and laboratory experiments, microbiologicial processes coupled process and geothermal resources, NAPL transport in fracutured rock, geochemistry and chemical transport and more.

Effects of Dry Fractures on Matrix Diffusion in Unsaturated Fractured Rocks

Author :
Publisher :
ISBN 13 :
Total Pages : 22 pages
Book Rating : 4.:/5 (684 download)

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Book Synopsis Effects of Dry Fractures on Matrix Diffusion in Unsaturated Fractured Rocks by :

Download or read book Effects of Dry Fractures on Matrix Diffusion in Unsaturated Fractured Rocks written by and published by . This book was released on 2002 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: Matrix diffusion has been recognized as an important mechanism affecting solute transport through unsaturated fractured rock, where a significant fraction of the fracture network remains relatively dry and inactive in conducting liquid flow. This simulation study shows that dry fractures act as strong diffusion barriers to solute transport when such fractures divide the matrix into discrete blocks. Where fracture surface roughness causes some regions of direct contact between matrix blocks separated by a dry fracture, the contacts of the matrix blocks provide conduits for liquid flow and molecular diffusion across dry fractures. Simulation results indicate that the presence of dry fractures and their discontinuities considerably affect solute transport in unsaturated fractured rocks.