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Analysis of Resistance for Flow through Porous Media

Author: WuJinSui
Tutor: YuBoMing
School: Huazhong University of Science and Technology
Course: Condensed Matter Physics
Keywords: Porous media Resistance Pore ??throat model Fractal
CLC: O357.3
Type: Master's thesis
Year: 2007
Downloads: 346
Quote: 5
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Abstract


Porous media is widespread in nature , engineering materials , organisms , and underground structures , flow in porous media has been widespread concern . As the complexity of the micro- structure of the porous medium , the fluid flow in porous media resistance study to receive widespread attention . Of this study and to explore the following two aspects : First get a new pore throat resistance model combined with the average hydraulic radius and pore throat model , this model reveals that the flow resistance of the fluid in the porous medium is viscous energy loss and kinetic energy loss . The resulting expression is a function of the pore throat ratio , porosity , tortuosity and fluid nature of parameters , the predictive value of this model and Ergen equations and experimental data very well . This article and fractal characteristics of porous media combined the Hagen-Poiseulle equation derivation has been described porous media fluid flow fractal resistance model , the resulting model is the size of the pore throat ratio , porosity and fluid properties , porosity and particle 's the velocity of the fluid , and the fractal dimension D f and tortuosity dimension DT function . No empirical constants in this model , each parameter has a clear physical meaning. Sub- form model and Ergen equation and experimental data are also consistent with the well , which proved the model is reasonable . This model not only replace Ergen equation empirical constants, and is applicable to any shape and any size of the particles consisting of porous media . Both models reveal low Reynolds number flow , the flow resistance is mainly caused by the viscous energy loss . Become turbulent fluid flow at high Reynolds number flow resistance is mainly caused by the irregular pore local energy loss decision .

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CLC: > Mathematical sciences and chemical > Mechanics > Fluid Mechanics > Viscous fluid > Seepage
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