AuthorsJ. B. Haga, H. Osnes and H. P. Langtangen
TitleOn the Causes of Pressure Oscillations in Low-Permeable and Low-Compressible Porous Media
AfilliationScientific Computing, Scientific Computing, Scientific Computing
Publication TypeJournal Article
Year of Publication2011
JournalInternational Journal for Numerical and Analytical Methods in Geomechanics
Date PublishedJuly

Non-physical pressure oscillations are observed in finite element calculations of Biot's poroelastic equations in low-permeable media. These pressure oscillations may be understood as a failure of compatibility between the finite element spaces, rather than elastic locking. We present evidence to support this view by comparing and contrasting the pressure oscillations in low-permeable porous media with those in low-compressible porous media. As a consequence, it is possible to use established families of stable mixed elements as candidates for choosing finite element spaces for Biot{'}s equations.

Citation KeySimula.simula.18