Download or read book Gravity Currents in Porous Media written by Madeleine Jane Golding and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Self similarity in Inertial and Porous Media Gravity Currents written by and published by . This book was released on 2004 with total page 159 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Gravity Currents And Intrusions Analysis And Prediction written by Marius Ungarish and published by World Scientific. This book was released on 2020-12-08 with total page 815 pages. Available in PDF, EPUB and Kindle. Book excerpt: The flow of gravity currents and intrusions is a subject of active research and engineering application. Currently, there are no formal teaching courses for this topic. Materials and information available in the market are scattered and dated. Researchers and engineers face difficulties in acquiring the 'state-of-the-art' knowledge. The book bridges this gap between the need and supply of the relevant insight and know-how.Written by a renowned author who is a recognized authority in the field, this unique compendium assembles the relevant knowledge into a systematic and unified framework. The presentation is gradual from the elementary to the frontier, and accessible to readers with only a basic background in fluid mechanics and applied mathematics. This will facilitate the systematic acquirement and application of available knowledge to both practical problems and further research.This must-have volume is a useful monograph — that can also serve as a textbook in advanced courses — for researchers, students, engineers and applied mathematicians in the fields of civil engineering, hydraulic engineering, mechanical engineering, ocean engineering and environmental engineering.
Download or read book Self similarity in Inertial and Porous Media Gravity Currents written by Jochonia Special Mathunjwa and published by . This book was released on 2004 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Combined Effect of Rheology and Confining Boundaries on Spreading of Gravity Currents in Porous Media written by and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Axisymmetric gravity currents in a porous medium written by S. Lyle and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Gravity Currents written by John E. Simpson and published by Cambridge University Press. This book was released on 1999-10-21 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt: A 1997 paperback of well-received study of gravity currents for many disciplines, including meteorology, oceanography, earth science.
Download or read book An Introduction to Gravity Currents and Intrusions written by Marius Ungarish and published by CRC Press. This book was released on 2009-04-28 with total page 512 pages. Available in PDF, EPUB and Kindle. Book excerpt: Gravity currents and intrusions are the ubiquitous phenomena where a fluid of one density flows horizontally into a fluid of a different density. For researchers and engineers, the ability to understand and predict these flow fields is essential in wide-ranging applications including those involved with atmospheric and ocean dynamics, the propagation of pollutants, and the dispersion of volcanic clouds. Although many new theories, experimental data, simulation results, and insights have surfaced recently, most of these developments remain scattered in journals and conference papers. A systematic and unified introduction to the field, which incorporates the new results and developments, is bound to facilitate the application of the available knowledge to both practical problems and further investigations. Written by a recognized authority active in recent developments in gravity current research, An Introduction to Gravity Currents and Intrusions provides an up-to-date, self-contained, and systematic introduction to the study, interpretation, and prediction of gravity current flows. The author uses a simple mathematical framework to provide an accessible and comprehensive introduction to the mathematical and physical aspects of this important topic. The text supplies researchers and practitioners with the foundation required to formulate problems, interpret experimental results and measurements data, obtain simple and insightful analytical estimates and solutions, and develop or implement numerical codes for related problems. The book also points out gaps of knowledge in the current understanding that require further research. This accessible reference requires only a basic background in fluid mechanics and applied mathematics, making it an ideal starting place for researchers and engineers new to the field. It can also serve as a textbook for upper-level undergraduate and graduate level courses in fluid dynamics.
Download or read book Buoyancy Driven Flows in Heterogeneous Porous Media written by Bharath S. P. Kattemalalawadi and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: To improve the confidence of subsurface storage of fluids such as carbon-dioxide, acid-gas and hydrogen at various geological sites, a proper fluid dynamic understanding of flow phenomena occurring because of injecting these source fluids into a porous medium is necessary. While many advancements have been made in predicting the fluid flows in a uniform porous medium, the flow dynamics inside a non-uniform porous media remains less well understood. In this Thesis, we use theory, numerical simulations and experiments to clarify the fluid mechanics of injecting a source fluid into a saturated, multi-layered porous media in which each of the adjacent layers are separated by a sharp permeability jump. Throughout this study, we have considered small density differences between the source and ambient fluids (satisfying the Boussinesq approximation) and both these fluids are completely miscible with each other. The goal of the study is to inform three practical questions. The first research component is to predict the early-time spreading dynamics of plume fluid striking an inclined permeability jump, within porous media having upper- and lower-layers of comparable thicknesses. The plume fluid, upon striking a permeability jump, results in a pair of oppositely directed gravity currents propagating along slope in the up- and downdip directions. To address the flow dynamics along an inclined permeable boundary, we develop a theoretical model in which we derive coupled non-linear partial differential equations describing gravity currents propagating along slope and their draining into the lower layer. The model predicts flow dynamics at both transient- and steady-state conditions. We further validate this model with similitude laboratory experiments. Experimental images show that the interface of the flow front is blurred due to hydrodynamics dispersion, and hence is not especially sharp. The implications of this observation vis-{\` a}-vis theoretical model assumptions are discussed. The second research component is to study the effect of impermeable bottom and sidewall boundaries on the dynamics of the injected fluid. For this, we construct a two-layered porous medium inside a rectangular box and conduct experiments for various combinations of the source condition, permeability jump angle and layer depth. The experiments reveal the formation of two pairs of gravity currents, one in the upper layer (propagating along the permeability jump), and the second in the lower layer (propagating along the bottom boundary of the box). The dynamical influence of one gravity current upon the other, such as the occurrence of runout-override and remobilization from a state of runout, is investigated. At later instants in time, the gravity current flows are impeded due to the vertical sidewall boundaries which allows us to distinguish between two qualitatively different filling regimes, i.e.\,sequential vs.~simultaneous filling of the upper- and lower-layers. Furthermore, parameter combinations conducive to one or the other filling regime are also identified. The third research component regards to the flow pattern inside a more complicated multi-layered porous medium, i.e.~consisting of up to five layers. For this we derive steady analytical solutions for the gravity currents formed along each of the permeability jump boundaries. The model predicts the outer envelope of the flow pattern corresponding to steady flow conditions. Finite-element based COMSOL simulations are also performed for different combinations of layer permeabilities and also by changing the permeability jump angles. The comparison of outer envelope with the theory shows good agreement. Also, the impact of adding intermediate layers of different permeabilities on the maximum span of runout and storage areas are investigated.
Download or read book Particulate Gravity Currents written by W. D. McCaffrey and published by John Wiley & Sons. This book was released on 2009-03-05 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume arises from the conference Sediment Transport andDeposition by Particulate Gravity Currents held in the UK in 1998.The field of particulate gravity currents ranges from turbiditycurrents in the oceans, lakes and reservoirs to pyroclastic densitycurrents and avalanches, debris flows and lahars, grainflows,powder snow avalanches, effluent dispersal and ancient gravitycurrent deposits. Although the sub-division of particulate gravity currents intodiscrete sub-categories (such as grain flows, turbidity currents ordebris flows) provides a convenient descriptive shorthand, itundermines the sense of process continuum needed to describe manynatural flows. The structure of this volume reflects an integrativeaim, with papers grouped by research approach. The first section ofthe book contains six papers on theoretical and numerical modellingof a range of flow types. The following four papers are focusedupon combined theoretical and experimental modelling approaches.The next section contains four papers describing experimentalmodelling and the final section includes five papers detailingfield-based studies. The volume stands as a testament to the broad range of researchcarried out on particulate gravity currents, and hints at theenhanced rate of progress that is likely to be achieved throughfurther integrated studies. If you are a member of the International Association ofSedimentologists, for purchasing details, please see:http://www.iasnet.org/publications/details.asp?code=SP31
Download or read book The Effect of Buoyant Convection on the Buoyancy driven Spreading and Draining of Porous Media Gravity Currents Along a Permeability Jump written by Imran Khan and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: We investigate theoretically the impact of introducing convective dissolution along the interface of a (dense) miscible gravity current propagating up- and downdip along a permeability jump in a saturated, layered porous medium. Emphasis is placed on three different dissolution scenarios, namely constant dissolution, dissolution with simultaneous shutdown and dissolution with sequential shutdown. The last two modes are book-end opposite cases that make different assumptions concerning the mixing that arises along the gravity current-ambient interface. In the case of simultaneous shutdown, all portions of the interface experience the same rate of convective dissolution. Thus the point of shutdown, the instant at which the rate of dissolution begins to decrease, is everywhere the same. Simultaneous shutdown is associated with a rapid mixing of ambient fluid contaminated through dissolution in both the horizontal and vertical directions. By contrast, and in sequential shutdown, we neglect horizontal mixing in the ambient such that, in general, the rate of dissolution depends on position. In all three dissolution scenarios, we apply a sharp interface model and consider that the permeability jump separating the upper and lower layer of the porous medium makes an angle to the horizontal. To gauge the effectiveness of dissolution as a long-term trapping mechanism, e.g. for supercritical CO2 or acid-gas, we consider the temporal evolution of the storage efficiency and examine the impact of changing the dissolution strength, the (possibly infinite) time, t1, for the onset of shutdown and, for t1 ∞, the e-folding decay time, t2, which prescribes the rate at which dissolution terminates. The along-jump distances traveled by the up- and downdip gravity currents fall as the dissolution strength increases. This observation has special importance when characterizing gravity current intermediate run-out lengths, defined (for not small t1) as the along-jump propagation distances where there exists a balance between the fluid supplied to the gravity current vs. that lost by a combination of dissolution and basal draining. The run-out lengths so defined are classified as intermediate because, for t t1, shutdown decreases the rate of dissolution. The associated readjustment leads to a remobilization of previously-arrested gravity current fronts and the subsequent (though not indefinite) elongation of these along-jump flows. In turn, the distances traveled between intermediate and terminal run-out are shown to depend on the dissolution strength and t1. Contrasting sequential vs. simultaneous dissolution models, the former is associated with a high degree of injectate retention in the upper layer and is therefore associated with comparatively large storage efficiencies, E∗h. A more general comparison between dissolution models reveals regions of the parameter space where horizontal mixing in the ambient fluid plays a dynamically significant vs. minor role.
Download or read book Physics of Flow in Porous Media written by Jens Feder and published by Cambridge University Press. This book was released on 2022-10-06 with total page 361 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive, stepwise introduction to the basic terminology, methods and theory of the physics of flow in porous media.
Download or read book Transport Phenomena in Porous Media II written by I. Pop and published by Elsevier. This book was released on 2002-06-20 with total page 469 pages. Available in PDF, EPUB and Kindle. Book excerpt: Transport phenomena in porous media continues to be a field which attracts intensive research activity. This is primarily due to the fact that it plays an important and practical role in a large variety of diverse scientific applications. Transport Phenomena in Porous Media II covers a wide range of the engineering and technological applications, including both stable and unstable flows, heat and mass transfer, porosity, and turbulence.Transport Phenomena in Porous Media II is the second volume in a series emphasising the fundamentals and applications of research in porous media. It contains 16 interrelated chapters of controversial, and in some cases conflicting, research, over a wide range of topics. The first volume of this series, published in 1998, met with a very favourable reception. Transport Phenomena in Porous Media II maintains the original concept including a wide and diverse range of topics, whilst providing an up-to-date summary of recent research in the field by its leading practitioners.
Download or read book Multiphase Flow in Permeable Media written by Martin J. Blunt and published by Cambridge University Press. This book was released on 2017-02-16 with total page 503 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a fundamental description of multiphase fluid flow through porous rock, based on understanding movement at the pore, or microscopic, scale.
Download or read book Flow in Porous Rocks written by Andrew W. Woods and published by Cambridge University Press. This book was released on 2015 with total page 301 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides simplified models explaining flows in heterogeneous rocks, their physics and energy production processes, for researchers, energy industry professionals and graduate students.
Download or read book Convective Heat Transfer in Porous Media written by Yasser Mahmoudi and published by CRC Press. This book was released on 2019-11-06 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt: Focusing on heat transfer in porous media, this book covers recent advances in nano and macro’ scales. Apart from introducing heat flux bifurcation and splitting within porous media, it highlights two-phase flow, nanofluids, wicking, and convection in bi-disperse porous media. New methods in modeling heat and transport in porous media, such as pore-scale analysis and Lattice–Boltzmann methods, are introduced. The book covers related engineering applications, such as enhanced geothermal systems, porous burners, solar systems, transpiration cooling in aerospace, heat transfer enhancement and electronic cooling, drying and soil evaporation, foam heat exchangers, and polymer-electrolyte fuel cells.
Download or read book Modeling Density Driven Flow in Porous Media written by Ekkehard O. Holzbecher and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: Modeling of flow and transport in groundwater has become an important focus of scientific research in recent years. Most contributions to this subject deal with flow situations, where density and viscosity changes in the fluid are neglected. This restriction may not always be justified. The models presented in the book demonstrate immpressingly that the flow pattern may be completely different when density changes are taken into account. The main applications of the models are: thermal and saline convection, geothermal flow, saltwater intrusion, flow through salt formations etc. This book not only presents basic theory, but the reader can also test his knowledge by applying the included software and can set up own models.
