In the last decade, particularly in recent years, the macroscopic porous media theory has made a decisive progress concerning the fundamentals of the theory (kinematics, balance equations, and constitutive theory) and the development of mathematical models in various fields of engineering and biomechanics. This progress attracted some attention and therefore conferences (colloquia, symposia, etc.) were organized in the last three years devoted exclusively to the macroscopic porous media theory. Also in national and international journals a great number of important contributions have been published which has brought the porous media theory, in some parts, to a close. The goal of this paper is to give an introduction to the macroscopic porous media theory, whereby also some aspects of the microscopic scale will be touched. The introduction to the porous media theory must, however, be restricted, due to space limitations, to some important features of the complex porous media theory.
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