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dc.contributor.authorNordbotten, Jan Martin
dc.PublishedSIAM Journal on Numerical Analysis 2016, 54(2):942-968eng
dc.description.abstractIn this paper we discuss a new discretization for the Biot equations. The discretization treats the coupled system of deformation and flow directly, as opposed to combining discretizations for the two separate subproblems. The coupled discretization has the following key properties, the combination of which is novel: (1) The variables for the pressure and displacement are co-located and are as sparse as possible (e.g., one displacement vector and one scalar pressure per cell center). (2) With locally computable restrictions on grid types, the discretization is stable with respect to the limits of incompressible fluid and small time-steps. (3) No artificial stabilization term has been introduced. Furthermore, due to the finite volume structure embedded in the discretization, explicit local expressions for both momentum-balancing forces and mass-conservative fluid fluxes are available. We prove stability of the proposed method with respect to all relevant limits. Together with consistency, this proves convergence of the method. Finally, we give numerical examples verifying both the analysis and the convergence of the method.en_US
dc.rightsAttribution CC BYeng
dc.subjectPorous mediaeng
dc.subjectnumerical methodseng
dc.titleStable cell-centered finite volume discretization for biot equationsen_US
dc.typePeer reviewed
dc.typeJournal article
dc.rights.holderCopyright 2016 the authoren_US
dc.relation.projectNorges forskningsråd: 228832
dc.relation.projectNorges forskningsråd: 250223
dc.relation.projectNorges forskningsråd: 233736

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