Download or read book Viscous Effects in Pore Scale Modeling of Immiscible Fluid Flow Through Porous Media written by and published by . This book was released on 1999 with total page 99 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sites contaminated with dense nonaqueous phase liquids (DNAPLs) such as chlorinated solvents are, typically, exceptionally difficult to characterize because the unstable nature of the front results in complex distributions that are erratic, highly fingered and sensitive to small-scale heterogeneities. However, DNAPL source zone characterization is important for risk assessments, feasibility studies and identification of appropriate remediation technologies at DNAPL-contaminated sites. The extent and configuration of the source zone is also important input to multiphase mass transfer models. Pore scale models capture the essential physics of the multiphase migration process without the need to solve the large systems of equations inherent in continuum modeling. This research project developed a modified diffusion limited aggregation model that can be used to predict source zone geometry when viscous effects are important. A unique relationship between the model input parameter, the sticking probability and the essential properties governing the DNAPL-water front displacement was developed. The model was compared with both homogeneous and heterogeneous laboratory experiments. Model and laboratory results were found to compare well.

Download or read book Porous Media Fluid Transport and Pore Structure written by F Dullien and published by Elsevier. This book was released on 2012-12-02 with total page 417 pages. Available in PDF, EPUB and Kindle. Book excerpt: Porous Media: Fluid Transport and Pore Structure presents relevant data on the role of pore structure in terms of transport phenomena in pore spaces. The information is then applied to the interpretation of various experiments and results of model calculations. This book emphasizes the discussion of ""flow through porous media"" in terms of interactions among the three main factors. These factors are transport phenomena, interfacial effects, and pore structure. An introductory chapter opens the text and presents some of the basic concepts and terms that will be encountered all throughout. Chapters 2 to 4 focus on the important foundations of the physical phenomena as applied in the pore space of porous media. These foundations are capillarity, pore structure, and single phase flow and diffusion. Chapters 5 to 7 discuss more in detail the different applications of pore structure to various operations and processes. Some of the concepts covered in this part of the book include flow and/or diffusion through a porous medium, simultaneous flow of immiscible fluids and immiscible displacement, and miscible displacement and hydrodynamic dispersion. This book is a good reference to students, scientists, and engineers in the field of chemistry, physics, and biology.

Download or read book Direct Pore level Modeling of Fluid Flow in Porous Media written by Saeed Ovaysi and published by . This book was released on 2010 with total page 137 pages. Available in PDF, EPUB and Kindle. Book excerpt: A three-dimensional fully parallel particle-based model for direct pore-level simulation of incompressible viscous fluid flow in disordered porous media is presented. The model is capable of simulating flow in porous media, taking directly as input three-dimensional high-resolution microtomography images of naturally-occurring or man-made porous systems. These images provide the most faithful representations of the pore space in the porous medium. In this method, the entire medium, i.e., solid and fluid, is discretized using particles. The model is based on the Moving Particle Semi-implicit (MPS) technique and modified to improve its stability. The model handles highly irregular fluid-solid boundaries effectively, accounts for viscous pressure drop in addition to gravity forces, conserves mass, and can automatically detect any false connectivities with fluid particles in the neighboring pores and throats. The model also includes a sophisticated algorithm to automatically split and merge fluid particles to maintain hydraulic connectivity of extremely narrow conduits. Finally, it uses novel methods to handle particle inconsistencies and open boundaries. To handle the computational load, a fully parallel version of the model is presented that runs on distributed memory computer clusters and exhibits excellent scalability. The accuracy and reliability of the model in predicting the true flow in porous systems was validated rigorously against analytical, numerical, and experimental data available in the literature. The validated model was then used to simulate flow in naturally-occurring sandstones to compute their absolute permeabilities and their variations with sample size and flow direction. The model was extended to handle the pore-level transport of solutes in random porous media. Two different sandstones possessing different topologies were used to investigate pre-asymptotic and asymptotic longitudinal dispersion coefficients, the impact of pore-scale topologies on the transient behavior of convective-diffusive solute transport at the pore-level, and the impact of inertial forces on dispersion coefficients at very high Peclet numbers. The asymptotic dispersion coefficients were then successfully compared against the experimental data available in the literature for a wide range of Peclet number. Furthermore, a solute adsorption module was developed and integrated with the model allowing us to study the adsorptive-diffusive-convective solute transport in a rough-walled single fracture. These studies provide new insights into the pore-scale behavior of fluid flow and solute transport in random porous media. The model serves as a reliable platform for studies of different pore-level phenomena that can improve our understanding of the pore-level physics of flow and transport.

Download or read book Pore scale Experimental Investigations of Immiscible Displacements in Capillary Tubes and Porous Micromodels written by Mohammad Heshmati and published by . This book was released on 2017 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: Owing to the complicated nature of a porous medium, study of dynamics of fluid flow in such structures is not straightforward. Therefore, researchers have been using simplified one-dimensional (1D) and two-dimensional (2D) porous media models like capillary tubes, micro-models and micro-fluidic devices to perform such studies. We utilized both of these categories to investigate different parameters affecting the flow of fluids in a porous medium. In 1D, capillary tubes of different cross-sectional shapes and several wetting fluids are used to investigate the evolution of dynamic contact angle with the meniscus velocity. The meniscus rise vs. time curves produced by Washburn's equation are improved by implementing our experimentally measured dynamic contact angle values into the Washburn's original equation. A general empirical correlation is presented for variation of normalized rise with dynamic contact angle as well. In the second category, a novel two-phase, two-field-of-view micro-Particle-Image-Velocimetry system is developed. It allows simultaneous study of flow fields at the pore- and micromodel-scales and provides a deeper insight into the distribution of fluids. The effect of change of flow rate on shear stress at the interface of invading and defending fluids in a designed pore-doublet configuration made of Polydimethylsiloxane (PDMS) is studied. The impact of local perturbations of velocity fields on displacement of non-wetting phase and the residual trapping is also discussed. We show that these effects produce extensively different distributions of the trapped non-wetting phase globules. A modified 2D X-ray micro-computed tomography image of Bentheimer sandstone is replicated on PDMS. Single-phase velocity measurements in these models afford valuable insights into the complicated flow patterns through a porous medium; whereas in two-phase flow tests, in addition to resolving the velocity fields in both fluids, effects of changes in invading wetting phase flow rate and viscosity on pore fluid configuration and residual trapping is investigated as well. Not only these results provide a valuable understanding of the complexities of flow through porous systems, but also they can be used to validate the numerical models of fluid flow through porous systems.

Download or read book Fundamentals and Practical Aspects of Gas Injection written by Reza Azin and published by Springer Nature. This book was released on 2021-07-28 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers different aspects of gas injection, from the classic pressure maintenance operation to enhanced oil recovery (EOR), underground gas storage (UGS), and carbon capture and storage (CCS). The authors detail the unique characteristics and specific criteria of each application, including: material balance equations phase behaviour reservoir engineering well design operating aspects surface facilities environmental issues Examples, data, and simulation codes are provided to enable the reader to gain an in-depth understanding of these applications. Fundamentals and Practical Aspects of Gas Injection will be of use to practising engineers in the fields of reservoir engineering, and enhanced oil recovery. It will also be of interest to researchers, academics, and graduate students working in the field of petroleum engineering.

Download or read book Upscaling Multiphase Flow in Porous Media written by D.B. Das and published by Springer Science & Business Media. This book was released on 2005-12-05 with total page 259 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides concise, up-to-date and easy-to-follow information on certain aspects of an ever important research area: multiphase flow in porous media. This flow type is of great significance in many petroleum and environmental engineering problems, such as in secondary and tertiary oil recovery, subsurface remediation and CO2 sequestration. This book contains a collection of selected papers (all refereed) from a number of well-known experts on multiphase flow. The papers describe both recent and state-of-the-art modeling and experimental techniques for study of multiphase flow phenomena in porous media. Specifically, the book analyses three advanced topics: upscaling, pore-scale modeling, and dynamic effects in multiphase flow in porous media. This will be an invaluable reference for the development of new theories and computer-based modeling techniques for solving realistic multiphase flow problems. Part of this book has already been published in a journal. Audience This book will be of interest to academics, researchers and consultants working in the area of flow in porous media.

Download or read book Flow and Transformations in Porous Media written by Renaud Toussaint and published by Frontiers Media SA. This book was released on 2017-02-07 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fluid flow in transforming porous rocks, fracture networks, and granular media is a very active interdisciplinary research subject in Physics, Earth Sciences, and Engineering. Examples of natural and engineered processes include hydrocarbon recovery, carbon dioxide geo-sequestration, soil drying and wetting, pollution remediation, soil liquefaction, landslides, dynamics of wet or dry granular media, dynamics of faulting or friction, volcanic eruptions, gas venting in sediments, karst development and speleogenesis, ore deposit development, and radioactive waste disposal. Hydrodynamic flow instabilities and pore scale disorder typically result in complex flow patterning. In transforming media, additional mechanisms come into play: compaction, de-compaction, erosion, segregation, and fracturing lead to changes in permeability over time. Dissolution, precipitation, and chemical reactions between solutes and solids may gradually alter the composition and structure of the solid matrix, either creating or destroying permeable paths for fluid flow. A complex, dynamic feedback thus arises where, on the one hand, the fluid flow affects the characteristics of the porous medium, and on the other hand the changing medium influences the fluid flow. This Research Topic Ebook presents current research illustrating the depth and breadth of ongoing work in the field of flow and transformation in porous media through 15 papers by 72 authors from around the world. The body of work highlights the challenges posed by the vast range of length- and time-scales over which subsurface flow processes occur. Importantly, phenomena from each scale contribute to the larger-scale behavior. The flow of oil and gas in reservoirs, and the flow of groundwater on catchment scale is sensitively linked to pore scale processes and material heterogeneity down to the micrometer scale. The geological features of the same reservoirs and catchments evolved over millions of years, sometimes as a consequence of cracking and fracture growth occurring on the time scale of microseconds. The research presented by the authors of this Research Topic represents a step toward bridging the separation of scales as well as the separation of scientific disciplines so that a more unified picture of flow and transformation in porous media can start to emerge.

Download or read book The Lattice Boltzmann Equation written by S. Succi and published by Oxford University Press. This book was released on 2001-06-28 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: Certain forms of the Boltzmann equation, have emerged, which relinquish most mathematical complexities of the true Boltzmann equation. This text provides a detailed survey of Lattice Boltzmann equation theory and its major applications.

Download or read book Wettability Effects on Flow Through Porous Media written by Sandeep Dhawan and published by . This book was released on 1994 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Mathematical Modeling for Flow and Transport Through Porous Media written by Gedeon Dagan and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 293 pages. Available in PDF, EPUB and Kindle. Book excerpt: The main aim of this paper is to present some new and general results, ap plicable to the the equations of two phase flow, as formulated in geothermal reservoir engineering. Two phase regions are important in many geothermal reservoirs, especially at depths of order several hundred metres, where ris ing, essentially isothermal single phase liquid first begins to boil. The fluid then continues to rise, with its temperature and pressure closely following the saturation (boiling) curve appropriate to the fluid composition. Perhaps the two most interesting theoretical aspects of the (idealised) two phase flow equations in geothermal reservoir engineering are that firstly, only one component (water) is involved; and secondly, that the densities of the two phases are so different. This has led to the approximation of ignoring capillary pressure. The main aim of this paper is to analyse some of the consequences of this assumption, especially in relation to saturation changes within a uniform porous medium. A general analytic treatment of three dimensional flow is considered. Pre viously, three dimensional modelling in geothermal reservoirs have relied on numerical simulators. In contrast, most of the past analytic work has been restricted to one dimensional examples.

Download or read book Flow Visualization and Modeling of Immiscible Fluid in a Porous Media Saturated with a Fluid Having Different Viscosity written by Rajalingam Manickam Palli V. and published by . This book was released on 1997 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Lattice Gas Methods For Partial Differential Equations written by Gary Doolen and published by CRC Press. This book was released on 2019-03-01 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt: Although the idea of using discrete methods for modeling partial differential equations occurred very early, the actual statement that cellular automata techniques can approximate the solutions of hydrodynamic partial differential equations was first discovered by Frisch, Hasslacher, and Pomeau. Their description of the derivation, which assumes the validity of the Boltzmann equation, appeared in the Physical Review Letters in April 1986. It is the intent of this book to provide some overview of the directions that lattice gas research has taken from 1986 to early 1989.

Download or read book Flow of Fluids Through Porous Materials written by Royal Eugene Collins and published by Pennwell Books. This book was released on 1976 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Viscous Flow Through Porous Media written by Stephen Prager and published by . This book was released on 1961 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Mathematical Modelling Of Flow Through Porous Media Proceedings Of The Conference written by Alain P Bourgeat and published by World Scientific. This book was released on 1995-11-30 with total page 534 pages. Available in PDF, EPUB and Kindle. Book excerpt: This proceedings volume contains contributions from leading scientists working on modelling and numerical simulation of flows through porous media and on mathematical analysis of the equations associated to the modelling. There is a number of contributions on rigorous results for stochastic media and for applications to numerical simulations. Modelling and simulation of environment and pollution are also subject of several papers. The published material herein gives an insight to the state of the art in the field with special attention for rigorous discussions and results.

Download or read book Multiphase Flow in Porous Media written by P.M. Adler and published by Springer Science & Business Media. This book was released on 2013-11-27 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt: The study of multiphase flow through porous media is undergoing intense development, mostly due to the recent introduction of new methods. After the profound changes induced by percolation in the eighties, attention is nowadays focused on the pore scale. The physical situation is complex and only recently have tools become available that allow significant progress to be made in the area. This volume on Multiphase Flow in Porous Media, which is also being published as a special issue of the journal Transport in Porous Media, contains contributions on the lattice-Boltzmann technique, the renormalization technique, and semi-phenomenological studies at the pore level. Attention is mostly focused on two- and three-phase flows. These techniques are of tremendous importance for the numerous applications of multiphase flows in oil fields, unsaturated soils, the chemical industry, and environmental sciences.

Download or read book Pore scale Dynamics of Immiscible Two phase Flow on Porous and Fractured Media written by Qingqing Gu and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pore-scale investigations of immiscible two-phase flow displacement dynamics in porous media provides crucial information to natural and industrial processes such as nonaqueous phase liquid (NAPL) contamination of groundwater, carbon dioxide injection and storage, and enhanced oil recovery (EOR) operations. It has the potential to transform our understanding of multiphase flow processes, to improve oil and gas recovery efficiency, and to facilitate safe carbon dioxide storage. However, the modelled porespace geometry is naturally complex for these fields of application. For directly simulating multiphase flow within the complex structure, the most widely-used approach isthe lattice Boltzmann method (LBM).In this thesis, the implementation of the state-of-the-art colour gradient two-phase LBMhas been validated against the theoretical solution for capillary filling, and analytical solutions for relative permeabilities in a cocurrent flow in a 2D channel. Then it is employed to investigate the effects of interfacial tension, wettability, and the viscosity ratio on displacement of one fluid by another immiscible fluid in a two-dimensional(2D) Berea sandstone.