Journal ArticleDOI
A statistical model of a porous medium with nonuniform pores
R. E. Haring,Robert A. Greenkorn +1 more
TLDR
In this article, a random network model of a porous medium with non-uniform pores has been constructed, where nonuniformity is achieved by assigning twoparameter distributions to pore radius and pore length.Abstract:
A random network model of a porous medium with nonuniform pores has been constructed. Nonuniformity is achieved by assigning two-parameter distributions to pore radius and pore length. Statistical derivations result in expressions for bulk model properties which are consistent with known empirical behavior of porous media such as capillary pressure, hydraulic permeability, and longitudinal and transverse dispersion. A series of experiments is suggested whereby the parameters of porous media structure may be determined from observed macroscopic behavior by using the expressions developed in this paper.read more
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Convection Heat Transfer
TL;DR: In this paper, the authors describe a transition from Laminar boundary layer flow to Turbulent Boundary Layer flow with change of phase Mass Transfer Convection in Porous Media.
Journal ArticleDOI
Flow phenomena in rocks : from continuum models to fractals, percolation, cellular automata, and simulated annealing
TL;DR: In this article, theoretical and experimental approaches to flow, hydrodynamic dispersion, and miscible and immiscible displacement processes in reservoir rocks are reviewed and discussed, and two different modeling approaches to these phenomena are compared.
Journal ArticleDOI
Chemical and Physical Structure of Polymers as Carriers for Controlled Release of Bioactive Agents: A Review
Robert Langer,Nicholas A. Peppas +1 more
TL;DR: In a controlled release system, a drug, pesticide, or other bioactive agent is incorporated into a carrier, generally a polymeric material as mentioned in this paper, and the rate of release of the substance is determined by the properties of the polymer itself and is only weakly dependent on environmental factors.
Journal ArticleDOI
A critical review of dispersion in packed beds
TL;DR: In this paper, the authors summarized and reviewed a great deal of information from the literature on dispersion in packed beds, and provided empirical correlations for the prediction of the dispersion coefficients (D T and D L) over the entire range of practical values of Sc and Pem.
Journal ArticleDOI
A new three-dimensional modeling technique for studying porous media
TL;DR: In this article, a short bibliographic survey of the relationship between the structure of porous media on the microscopic level and their overall properties is presented, with special attention being paid to the use of models.