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Book Dissolution of a Nonaqueous Phase Liquid in Saturated Porous Media

Download or read book Dissolution of a Nonaqueous Phase Liquid in Saturated Porous Media written by Paul T. Imhoff and published by . This book was released on 1992 with total page 688 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Theoretical Analyses of Nonaqueous Phase Liquid Dissolution induced Instability in Two dimensional Fluid saturated Porous Media

Download or read book Theoretical Analyses of Nonaqueous Phase Liquid Dissolution induced Instability in Two dimensional Fluid saturated Porous Media written by Chongbin Zhao and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Characterization of Non aqueous Phase Liquid Dissolution in Porous Media Using Nuclear Magnetic Resonance Imaging

Download or read book Characterization of Non aqueous Phase Liquid Dissolution in Porous Media Using Nuclear Magnetic Resonance Imaging written by Alicia Renee Aragon and published by . This book was released on 2000 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Influence of Porous Media Heterogeneity on Nonaqueous Phase Liquid Dissolution Fingering and Upscaled Mass Transfer

Download or read book Influence of Porous Media Heterogeneity on Nonaqueous Phase Liquid Dissolution Fingering and Upscaled Mass Transfer written by Matthew W. Farthing and published by . This book was released on 2012 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Nonaqueous Phase Liquid Dissolution in Porous Media

Download or read book Nonaqueous Phase Liquid Dissolution in Porous Media written by and published by . This book was released on 2007 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt: Industrial organic solvents such as trichloroethylene (TCE) and tetrachloroethylene (PCE) constitute a principal class of groundwater contaminants. Cleanup of groundwater plume source areas associated with these compounds is problematic, in part, because the compounds often exist in the subsurface as dense nonaqueous phase liquids (DNAPLs). Ganglia (or 'blobs') of DNAPL serve as persistent sources of contaminants that are difficult to locate and remediate (e.g. Fenwick and Blunt, 1998). Current understanding of the physical and chemical processes associated with dissolution of DNAPLs in the subsurface is incomplete and yet is critical for evaluating long-term behavior of contaminant migration, groundwater cleanup, and the efficacy of source area cleanup technologies. As such, a goal of this project has been to contribute to this critical understanding by investigating the multi-phase, multi-component physics of DNAPL dissolution using state-of-the-art experimental and computational techniques. Through this research, we have explored efficient and accurate conceptual and numerical models for source area contaminant transport that can be used to better inform the modeling of source area contaminants, including those at the LLNL Superfund sites, to re-evaluate existing remediation technologies, and to inspire or develop new remediation strategies. The problem of DNAPL dissolution in natural porous media must be viewed in the context of several scales (Khachikian and Harmon, 2000), including the microscopic level at which capillary forces, viscous forces, and gravity/buoyancy forces are manifested at the scale of individual pores (Wilson and Conrad, 1984; Chatzis et al., 1988), the mesoscale where dissolution rates are strongly influenced by the local hydrodynamics, and the field-scale. Historically, the physico-chemical processes associated with DNAPL dissolution have been addressed through the use of lumped mass transfer coefficients which attempt to quantify the dissolution rate in response to local dissolved-phase concentrations distributed across the source area using a volume-averaging approach (Figure 1). The fundamental problem with the lumped mass transfer parameter is that its value is typically derived empirically through column-scale experiments that combine the effects of pore-scale flow, diffusion, and pore-scale geometry in a manner that does not provide a robust theoretical basis for upscaling. In our view, upscaling processes from the pore-scale to the field-scale requires new computational approaches (Held and Celia, 2001) that are directly linked to experimental studies of dissolution at the pore scale. As such, our investigation has been multi-pronged, combining theory, experiments, numerical modeling, new data analysis approaches, and a synthesis of previous studies (e.g. Glass et al, 2001; Keller et al., 2002) aimed at quantifying how the mechanisms controlling dissolution at the pore-scale control the long-term dissolution of source areas at larger scales.

Book Dissolution of Non aqueous Phase Liquid Pools in Saturated Porous Media

Download or read book Dissolution of Non aqueous Phase Liquid Pools in Saturated Porous Media written by Michael P. Whelan and published by . This book was released on 1992 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Study of Transport and Dissolution of a Nonaqueous Phase Liquid in Porous Media

Download or read book Study of Transport and Dissolution of a Nonaqueous Phase Liquid in Porous Media written by Mirrya Mosier Fontenot and published by . This book was released on 2001 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt: The transport and dissolution of residual non-aqueous phase liquids (NAPLS) trapped in water saturated porous media is a problem pertinent to both environmental and petrochemical industries. In this work we have quantitatively examined the complete dissolution of residual entrapped NAPL at the pore-scale in three dimensions using refractive index matching techniques along with planar laser induced fluorescence. The results yielded pore-scale information regarding ganglia volume, surface area, and position over time at various Capillary numbers. We found that with increasing Capillary numbers, the time for total dissolution decreased. In addition, it appears that large ganglia exhibit fractal area to volume scaling. We were also able to examine the distributions of the ganglia in the direction of flow over time. The use of low-frequency flow pulsations as a removal technique was also examined. A two dimensional micro model was used for these studies. We found that for this system, lower frequencies and higher amplitudes were more effective in NAPL removal due to breakup and mobilization. We also examined the effect of increasing amplitude and continuous versus pulsed stimulation. In addition, mass transport in the presence of a surfactant was also enhanced due to flow pulsation with lower frequencies and higher amplitudes again being most effective.

Book Dissolution of Non aqueous Phase Organic Liquids in Porous Media

Download or read book Dissolution of Non aqueous Phase Organic Liquids in Porous Media written by Jil Talkovsky Geller and published by . This book was released on 1990 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Pore Scale Study of the Dissolution of Residual Non aqueous Phase Liquids in Porous Media

Download or read book Pore Scale Study of the Dissolution of Residual Non aqueous Phase Liquids in Porous Media written by Nahla Adnan Sahloul and published by . This book was released on 2000 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Physical and Chemical Dissolution Front Instability in Porous Media

Download or read book Physical and Chemical Dissolution Front Instability in Porous Media written by Chongbin Zhao and published by Springer. This book was released on 2014-07-18 with total page 363 pages. Available in PDF, EPUB and Kindle. Book excerpt: This monograph provides state-of-the-art theoretical and computational findings from investigations on physical and chemical dissolution front instability problems in porous media, based on the author’s own work. Although numerical results are provided to complement theoretical ones, the focus of this monograph is on the theoretical aspects of the topic and those presented in this book are applicable to a wide range of scientific and engineering problems involving the instability of nonlinear dynamic systems. To appeal to a wider readership, common mathematical notations are used to derive the theoretical solutions. The book can be used either as a useful textbook for postgraduate students or as a valuable reference book for computational scientists, mathematicians, engineers and geoscientists.