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ABSTRACT: Tortuosity Ï is defined as the square of the ratio, Ï-range of the effective length of pore channels to the length parallel to the overall direction of the pore channels in a porous medium. It has significance in interpreting the hydraulic and electric properties of porous media. In this study, experimental results of tortuosity and porosity Ï were investigated in relation to different directions of flow in various unconsolidated porous media. When the media (mica, textile fibers, kaolinite, and bituminous soil, with a high Ï-range of â60--90%) are exposed to flow perpendicular to the planes and fibers, Ï responds positively to Ï. When the media (randomly packed beds of spheres, with a medium Ï-range of â34--45%) are exposed to flow parallel to the planes, Ï responds negatively to Ï. When the media (glass powders, glass spheres, dry soil, quartz sand, and white sand, with a variety of grain sizes and a medium porosity Ï-range of â37--47%), and other media (glass spheres, with different fractions of grain sizes and a low Ï-range of â10--30%) are exposed to non-directional flow, Ï responds negatively to Ï. Empirical equations linking Ï and Ï, with medium to high coefficients of correlation, were obtained. The dependence of Ï on Ï is governed greatly by the direction of flow because of the orientation, mineralogy, and mode of packing of the grains and nonuniformity in the size and shape of the grains and pores. FOR CITATION: Salem, H.S., and Chilingarian, G.V. (2000). Influence of Porosity and Direction of Flow on Tortuosity in Unconsolidated Porous Media, Energy Sources, 2000 (April), 22(3): 207-213 DOI: 10.1080/00908310050013992 and https://www.researchgate.net/publication/241946445_Influence_of_Porosity_and_Direction_of_Flow_on_Tortuosity_in_Unconsolidated_Porous_Media IMPORTANT NOTE: This Paper was fully plagiarized (in the form of "Copy & Paste") by some researchers at Nigerian universities. For further details, please see this: https://www.researchgate.net/publication/299392422_A_Must_Read_Plagiarism_Theft_of_Intellectual_Property_Is_A_Crime_Representing_Violation_of_Law_of_Intellectual_Property_Rights_and_of_Human_Rights_and_Accordingly_It_Must_Be_Punished

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This paper is important because of its contribution to several fields of specialty, including porous media, civil engineering, petroleum engineering, water engineering, fluid mechanics, materials science, physics, chemistry, medicine, pharmaceuticals, and various kinds of industry. Because of this a great number of research scientists specialized in different fields have cited and referenced this paper in their published research.

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This paper is of a special and remarkable significance because it has contributed to a great deal of published research undertaken by several researchers, research scientists and engineers, as well as by many postgraduate students enrolled in their Master and Doctorate programs at many prestigious universities in several countries across the world..

Prof. Dr. Hilmi S. Salem

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This page is a summary of: Influence of Porosity and Direction of Flow on Tortuosity in Unconsolidated Porous Media, Energy Sources, March 2000, Taylor & Francis, DOI: 10.1080/00908310050013992.
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