Coupling: Pore Fluid-Grains Interaction

  • D. Kolymbas
Conference paper
Part of the International Centre for Mechanical Sciences book series (CISM, volume 385)


The interaction (coupling) between grains and pore fluid is manifested in the static case (no relative motion between grains and pore fluid) as well as in the dynamic case. In the static case (i.e. no relative velocity between grains and pore fluid), the important item is the so-called principle of effective stress. In the dynamic case the interaction is mainly expressed by Darcy’s law and the so-called inertia coupling. We shall see that the pertinent relations are of limited validity. Before doing so we shall consider the main equations of the theory of mixtures which are very useful when dealing with composite materials. It should be stressed that we consider here only granular media where the grains form a grain skeleton. Thus, dispersions of grains within a fluid carrier are here not considered.


Pore Pressure Effective Stress Void Ratio Pore Fluid Granular Medium 
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Copyright information

© Springer-Verlag Wien 1998

Authors and Affiliations

  • D. Kolymbas
    • 1
  1. 1.University of InnsbruckInnsbruckAustria

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