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EFFECT OF ANGLE OF INCLINATION ON NONUNIFORM FLOW THROUGH POROUS MEDIA

Volume 18, Edição 9, 2015, pp. 879-892
DOI: 10.1615/JPorMedia.v18.i9.50
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RESUMO

Steady nonuniform flow through porous media was investigated when the porous media were confined within a convergent configuration. The objectives are to investigate how the velocity of fluid is affected when it flows through porous media of different porosities of varying angles of inclination and also to study the variation of resistance flow or friction factor (Fk) with varying angle of inclination and ratio of widths (B1/B2). In order to meet the objective of this study, a tilting angle convergent permeameter was fabricated and crushed rock of size 7.30 mm was used as media and water as fluid, to develop curves relating friction factor (Fk) and Reynolds number (Rk) for different ratios of width using intrinsic permeability (k) as characteristic length. The variation of Fk and Rk for different Cw values for different tilting angles (φ) are compared to the experimental data and observed to lie on the theoretical curve. It was inferred that angle of inclination has a significant effect on the nonuniform flow, and it was noticed that velocity of flow increases with increasing angle of inclination and it was also observed that the greater the difference in the porosity of the cross section of the media in which the fluid is flowing, the greater the intrinsic permeability (k). Also observed was that both linear parameter a and nonlinear parameter b increase with decrease of angle of inclination for different ratios of width. The variation of intrinsic permeability (k) and media constant (CW) with different tilting angles (φ) is examined and also is developed k versus N curves and CW versus B1/B2 curves for different tilting angles (φ). Experimental results show that resistance flow increases with the decrease of tilting angle and it was also observed that resistance flow increases with the increase of ratio of widths (B1/B2).

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