Modelling of Swelling Phenomena in Charged Hydrated Porous Media

摘要: Biological tissues like articular cartilage and geomaterials clay have a multicomponent microstructure. The charged solid is saturated by viscous fluid, which itself composed of several components: the liquid solvent dissolved ions, namely, water, anions cations. These multiphase materials exhibit swelling behaviour under varying chemical conditions. The model describing such combines electrochemical mechanical effects osmosis electrostatics within macroscopic formulation. Starting from Theory Porous Media (TPM), four component presented, wherein all constituents are materially incompressible mass exchanges excluded. This isothermal leads to set equations consists three primary variables: displacement uS, pore-pressure p molar ion concentration cm, since concentrations always depend on each other because electroneutrality condition. For numerical treatment, weak formulations governing implemented in FE tool PANDAS, Taylor-Hood elements used for spatial discretization. Finally, simulation 3-d experiment shown. (© 2004 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)