Title: Transport in Porous Media

Title: Transport in Porous Media

ISO Abbreviated Title: Transp. Porous Media

JCR Abbreviated Title: Transport Porous Med

ISSN: 0169-3913

Issues/Year: 12

Journal Country/Territory: Netherlands

Language: English

Publisher: Kluwer Academic Publ

Publisher Address: Spuiboulevard 50, PO Box 17, 3300 AA Dordrecht, Netherlands

Subject Categories:

Engineering, Chemical: Impact Factor 1.037, 21/126 (2002)

? Hadad, A., Bensabat, J. and Rubin, H. (1996), Simulation of immiscible multiphase flow in porous media: A focus on the capillary fringe of oil-contaminated aquifers. Transport in Porous Media, 22 (3), 245-269.

Full Text: 1996\Tra Por Med22, 245.pdf

Abstract: This paper deals with the analysis of some aspects of the vertical and lateral migration of oil spills in the unsaturated and the capillary zone of a phreatic aquifer. Our motivation stems from the fact that such contamination represents a severe danger for ground-water resources all over the world and from the present acute problem of jet-fuel contamination in some location of Israel. In the present study, we shall focus our efforts on the analysis of the upper layers of the aquifer which are often subjected to the most significant oil contamination. Neglecting coupled processes effects such as dilution, adsorption and volatilization, also adopting Richard’s assumption, a three-phase flow model is introduced with capillary heads of the water and the oil as variables. The resulting model which is coupled and strongly non-linear is solved using a vertical two-dimensional Finite-Element procedure together with a quasi-Newton optimization algorithm. Applying that scheme, various scenarios of oil migration in the unsaturated and the capillary zone were simulated. Some migration characteristics prediced by the numerical simulations are discussed. In particular, the dynamics of the water and oil phases during the migration process is discussed.

Keywords: Oil Contaminated Aquifer, Multi-Phase Flow, Aquifer Contamination, Napl Contamination, Organic-Compounds, Unsaturated Zone, Equation, Subsurface, Transport, Migration, Fluids, Model

? Lu, M. and Connell, L.D. (2007), A dual-porosity model for gas reservoir flow incorporating adsorption behaviour - part I. Theoretical development and asymptotic analyses. Transport in Porous Media, 68 (2), 153-173.

Full Text: 2007\Tra Por Med68, 153.pdf

Abstract: In this paper a rigorous dual-porosity model is formulated, which accurately represents the coupling between large-scale fractures and the micropores within dual porosity media. The overall structure of the porous medium is conceptualized as being blocks of diffusion dominated micropores separated by natural fractures (e.g. cleats for coal) through which Darcy’s flow occurs. In the developed model, diffusion in the matrix blocks is fully coupled to the pressure distribution within the fracture system. Specific assumptions on the pressure behaviour at the matrix boundary, such as step-time function employed in some earlier studies, are not invoked. The model involves introducing an analytical solution for diffusion within a matrix block, and the resultant combined flow equation is a nonlinear integro-(partial) differential equation. Analyses to the equation in this text, in addition to the theoretical development of the proposed model, include: (1) discussion on the ‘fading memory’ of the model; (2); one-dimensional perturbation solution subject to a specific condition; and (3) asymptotic analyses of the ‘long-time’ and ‘short-time’ responses of the flow. Two previous models, the Warren-Root and the modified Vermeulen models, are compared with the proposed model. The advantages of the new model are demonstrated, particularly for early time prediction where the approximations of these other models can lead to significant error.

Keywords: Porous Media, Dual-Porosity, Adsorption, Permeability, Diffusion, Asymptotic Analysis, Integro-Differential Equation, Gas Reservoir, Sequestration of CO₂, Diffusion

Title: Transport Reviews

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JCR Abbreviated Title:

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: Impact Factor

? Pallis, A.A., Vitsounis, T.K. and De Langen, P.W. (2010), Port economics, policy and management: Review of an emerging research field. Transport Reviews, 30 (1), 115-161.

Full Text: 2010\Tra Rev30, 115.pdf

Abstract: This paper reviews research in port economics, policy and management during the period 1997-2008. In an increasingly international economy, research interest in ports is gradually emerging. This paper examines the developments, themes and characteristics of this research, by reviewing a comprehensive database consisting of all the 395 relevant journal papers on ports that were published during the period 1997-2008. With the use of quantitative and qualitative bibliometric tools, the paper identifies the characteristics of the port research community (such as the authors’ country of affiliation, number of authors involved and international collaboration rates). It also identifies the main characteristics of this emerging scientific research field (such as research approaches, units of analysis, samples of the ports examined and commodities analysed). Finally, the paper develops a content classification that distinguishes the main research subfields, identifies leading papers for these subfields and uses a cross-citation analysis to analyse the coherence of the port research field.

Keywords: Law, Operations-Research, Research, Review, Scientific Cooperation, Transportation

Title: Transportation Science

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JCR Abbreviated Title:

ISSN: 0041-1655

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Publisher: Operations Research Soc Amer, Linthicum Hts

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: Impact Factor

? Mahalel, D. and Hakkert, A.S. (1983), Further aspects of traffic arrival patterns on a multilane highway. Transportation Science, 17 (1), 71-86.

Full Text: 1983\Tra Sci17, 71.pdf

Abstract: The model presented in this study describes the arrival pattern of vehicles on a multilane unidirectional highway. It is based on the assumption that in discrete time intervals, the vehicle arrival patterns can be described as a Markov chain process. The Markov properties conveniently enable the expression of interdependence of vehicle arrivals within and among lanes. From the empirical data collected, it was found that in the fast lane, the arrival process is overdispersed and the tendency for bunching is greater than under Poisson distribution conditions. The arrival process in the slow lane is underdispersed and the vehicles tend to distribute themselves deterministically along the lane. The cross-correlation function between the arrival processes in two adjacent lanes indicates a clear dependence between the two processes. This dependence might limit the number of potential overtakings, increases the friction between lanes and increases the probability for a side collision.