FEFLOW: Finite Element Modeling of Flow, Mass and Heat by Hans-Jörg G. Diersch

By Hans-Jörg G. Diersch

FEFLOW is an acronym of Finite aspect subsurface move simulation approach and solves the governing circulation, mass and warmth delivery equations in porous andfractured media via a multidimensional finite point process for complicated geometric and parametricsituations together with variable fluid density, variable saturation, loose surface(s), multispeciesreaction kinetics, non-isothermal circulate and multidiffusive effects.FEFLOW includes theoretical paintings, modeling stories and simulation perform from a interval of approximately forty years. during this gentle, the most target of the current ebook is to proportion this accomplished point of modeling with all required details of the actual and numerical historical past with the reader. The booklet is meant to place complicated theoretical and numerical tools into the fingers of modeling practitioners and scientists. It starts off with a extra common idea for all proper move and delivery phenomena at the foundation of the continuum technique, systematically develops the elemental framework for vital periods of difficulties (e.g., multiphase/multispecies non-isothermal movement and delivery phenomena, discrete positive factors, aquifer-averaged equations, geothermal processes), introduces finite-element strategies for fixing the elemental stability equations, intimately discusses complicated numerical algorithms for the ensuing nonlinear and linear difficulties and completes with a few benchmarks, functions and workouts to demonstrate the different sorts of difficulties and how you can take on them effectively (e.g., circulation and seepage difficulties, unsaturated-saturated stream, advective-diffusion delivery, saltwater intrusion, geothermal and thermohaline flow).

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Sample text

5 Linear Relationship . . . . . . . . . . . . . . . . . . . 6 Time-Centered Analytic Moisture Capacity Evaluation . . . . . . . . .. . . . . . . . . . s/ and kr . / Relations. . . 1 Van Genuchten-Mualem (VGM) Relationship . . . . . 2 Brooks-Corey Relationship.. . . . .. . . . . . . . . . 3 Modified van Genuchten Relationship .. . . . . . . . . 4 Haverkamp Relationship . . . . . . . . . . .

1 Linear Quadrilateral Element as Parallelogram or Rectangle .. . . . . . . . . . . . . 2 Linear Hexahedral Element as Parallelepiped or Brick . . . . . .. . . . . . . . . . 3 Linear Pentahedral Element as Triangular Prism with Parallel Top and Bottom Surfaces .. . . . . 4 Linear Pyramidal Element with Parallelogram or Rectangular Base and Oblique Shape .. . . . . . . . . . . . . . . . 863 863 866 871 880 880 881 884 887 Parameters in Relation to Selected Problem Class, Medium Type and Dimension .

6 Time-Centered Analytic Moisture Capacity Evaluation . . . . . . . . .. . . . . . . . . . s/ and kr . / Relations. . . 1 Van Genuchten-Mualem (VGM) Relationship . . . . . 2 Brooks-Corey Relationship.. . . . .. . . . . . . . . . 3 Modified van Genuchten Relationship .. . . . . . . . . 4 Haverkamp Relationship . . . . . . . . . . . . . . . . 5 Exponential Relationship .. . . . . .. . . . . . . . . . 6 Linear Relationship .

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