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Essentials of Multiphase Flow and Transport in Porous Media

  • ID: 2174889
  • Book
  • August 2008
  • Region: Global
  • 272 Pages
  • John Wiley and Sons Ltd
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Mathematical–physical ways to express and address multiphase flow problems

This resource introduces the fundamental concepts that underlie the physics of multiphase flow and transport in porous media. It guides readers logically and step by step from simple concepts to advanced equations useful for addressing real–world problems including infiltration, groundwater contamination, and movement of non–aqueous phase liquids. The text develops governing equations for application to these and other problems in light of the physics that influence system behavior. Essentials of Multiphase Flow and Transport in Porous Media:

  • Introduces some of the qualitative physical characteristics of porous media

  • Develops and assesses constitutive relationships and parameters that provide quantitative measures of these characteristics

  • Derives equations that translate qualitative considerations to a quantitative description

  • Employs and explores mass conservation for species and phases

  • Makes use of Darcy′s law along with carefully described boundary conditions to obtain complete mathematical descriptions of subsurface systems

  • Provides sample physical problems and solutions that illustrate physical and mathematical aspects of multiphase flow and transport

Not only will readers better understand general governing equations, they will also be able to apply the equations to specific physical problems involving single and multiphase flow and transport in porous media. Because in–depth knowledge of continuum mechanics, mixture theory, porous media flow, and averaging theory is not assumed, this book is a timely reference for advanced undergraduate students and graduate students; practicing hydrogeologists, engineers, and scientists; and those interested in developing mastery of the important fundamental principles that underlie modeling of multiphase systems.

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1. Setting the Stage.

1.1 Introduction.

1.2 Phases and Porousmedia.

1.3 Grain and Pore Size Distributions.

1.4 The Concept of Saturation.

1.5 The Concept of Pressure.

1.6 Surface Tension Considerations.

1.7 Concept of Concentration.

1.8 Summary.

1.9 Exercises.

2. Mass Conservation Equations.

2.1 Introduction.

2.2 Microscalemass Conservation.

2.3 Integral Forms Ofmass Conservation.

2.4 Integral Theorems.

2.4.1 Divergence Theorem.

2.4.2 Transport Theorem.

2.5 Point Forms Ofmass Conservation.

2.6 Themacroscale Perspective.

2.6.1 The Representative Elementary Volume.

2.6.2 Global and Local Coordinate Systems.

2.6.3 Macroscopic Variables.

2.6.4 Definitions Of Macroscale Quantities.

2.6.5 Summary Of Macroscale Quantities.

2.7 The Averaging Theorems.

2.7.1 Spatial Averaging Theorem.

2.7.2 Temporal Averaging Theorem.

2.8 Macroscalemass Conservation.

2.8.1 Macroscale Point Forms.

2.8.2 Integral Forms.

2.9 Applications.

2.9.1 Integral Analysis.

2.9.2 Point Analysis.

2.10 Summary.

2.11 Exercises.

3. Flow Equations.

3.1 Introduction.

3.2 Darcy S Experiments.

3.3 Fluid Properties.

3.4 Equations of State for Fluids.

3.4.1 Mass Fraction.

3.4.2 Mass Density and Pressure.

3.4.3 Fluid Viscosity.

3.5 Hydraulic Potential.

3.5.1 Hydrostatic Force and Hydraulic Head.

3.5.2 Derivatives of Hydraulic Head.

3.6 Single Phase Fluid Flow.

3.6.1 Darcy S Law.

3.6.2 Hydraulic Conductivity and Permeability.

3.6.3 Derivation of Groundwater Flow Equation.

3.6.4 Recapitulation of the Derivation.

3.6.5 Initial and Boundary Conditions.

3.6.6 Two–Dimensional Flow.

3.7 Two–Phase Immiscible Flow.

3.7.1 Derivation of Flowequations.

3.7.2 Observations on the Pc – Sw Relationship.

3.7.3 Formulas for The Pc – Sw Relationship.

3.7.4 Observations of the Kà Rel – Sw Relationship.

3.7.5 Formulas for the Kà Rel – Sw Relation.

3.7.6 Special Cases of Multiphase Flow.

3.8 The Buckley–Leverett Analysis.

3.8.1 Fractional Flow.

3.8.2 Derivation of the Buckley–Leverett Equation.

3.8.3 Solution of the Buckley–Leverett Equation.

3.9 Summary.

3.10 Exercises.

4. Mass Transport Equations.

4.1 Introduction.

4.2 Velocity in the Species Transport Equations.

4.2.1 Direct Approach.

4.2.2 Rigorous Approach.

4.2.3 Distribution Approach.

4.2.4 Summary.

4.3 Closure Relations for the Dispersion Vector.

4.4 Chemical Reaction Rates.

4.5 Interphase Transfer Terms.

4.5.1 Kinetic Formulation.

4.5.2 Equilibriumformulation.

4.5.3 Summary: Kinetic Vs. Equilibrium Formulations.

4.6 Initial and Boundary Conditions.

4.7 Conclusion.

4.8 Exercises.

5. Simulation.

5.1 1–D Simulation of Air–Water Flow.

5.1.1 Drainage in a Homogeneous Soil.

5.1.2 Drainage in a Heterogeneous Soil.

5.1.3 Imbibition in Homogeneous Soil.

5.2 1–D Simulation of Dnapl–Water Flow.

5.2.1 Primary Dnapl Imbibition In Homogeneous Soil.

5.2.2 Density Effect.

5.2.3 Dnapl Drainage in Homogeneous Soil.

5.2.4 Secondary Imbibition of Dnapl in Homogeneous Soil.

5.2.5 Secondary Drainage in Homogeneous Soil.

5.2.6 Primary Imbibition in Heterogeneous Soil.

5.3 2–D Simulation of Dnapl–Water Flow.

5.3.1 Dnapl Descent into a Water–Saturated Reservoir.

5.4 Simulation Of Multiphase Flow And Transport.

5.4.1 1–D Two–Phase Flow and Transport.

5.4.2 2–D Two–Phase Flow and Transport.

5.5 2–D Single–Phase Flow and Transport.

5.5.1 Base–Case.

5.5.2 Effect of Inflow.

5.5.3 Impactofwell Discharge.

5.5.4 Effect of Adsorption.

5.5.5 Effect of a Low Transmissivity Region.

5.5.6 Effect of a High Transmissivity Region.

5.5.7 Effect of Rate of Reaction.

5.6 3–D Single–Phase Flow and Transport.

5.7 2–D Three–Phase Flow.

5.8 Summary.

6. Select Symbols.

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George F. Pinder
William G. Gray
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