WIAS Preprint No. 721, (2002)

Relaxation analysis and linear stability vs. adsorption in porous materials


  • Albers, Bettina
    ORCID: 0000-0003-4460-9152

2010 Mathematics Subject Classification

  • 76E20 76S05 74J05


  • stability of geophysical flows, flows in porous media, linear waves




The paper presents a linear stability analysis of a 1D stationary flow through a poroelastic medium. This base flow is perturbed in four ways: by longitudinal (1D) disturbances without and with mass exchange and by transversal (2D) disturbances without and with mass exchange. The eigenvalue problem for the first step field equations is solved using a finite-difference-scheme. For both disturbances without mass exchange results are confirmed by an analytical solution. We present the stability and relaxation properties in dependence on the two most important model parameters, namely the bulk and surface permeability coefficients.

Appeared in

  • Continuum Mech. Thermodyn,. 15 (2003) 1, pp. 73-95

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