FEFLOW

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<p><b>FEFLOW is an acronym of <i>Finite Element subsurface FLOW simulation system </i>and solves the governing flow, mass and heat transport equations in porous and<i> </i>fractured media by a multidimensional finite element method for complex geometric and parametric<i> </i>situations including variable fluid density, variable saturation, free surface(s), multispecies<i> </i>reaction kinetics, non-isothermal flow and multidiffusive effects.<i> </i>FEFLOW comprises theoretical work, modeling experiences and simulation practice from a period of about 40 years. In this light, the main objective of the present book is to share this achieved level of modeling with all required <i>details</i> of the physical and numerical background with the reader. The book is intended to put advanced theoretical and numerical methods into the hands of modeling practitioners and scientists. It starts with a more general theory for all relevant flow and transport phenomena on the basis of the continuum approach, <i>systematically</i> develops the basic framework for important classes of problems (e.g., multiphase/multispecies non-isothermal flow and transport phenomena, discrete features, aquifer-averaged equations, geothermal processes), introduces finite-element techniques for solving the basic balance equations, in detail discusses advanced numerical algorithms for the resulting nonlinear and linear problems and completes with a number of benchmarks, applications and exercises to illustrate the different types of problems and ways to tackle them successfully (e.g., flow and seepage problems, unsaturated-saturated flow, advective-diffusion transport, saltwater intrusion, geothermal and thermohaline flow).</b></p>