21 citations · 21 across the 16 of their papers we have counts for
4 papers · 1 filter
Port-Hamiltonian formulations of poroelastic network models
Robert Altmann, Volker Mehrmann, Benjamin Unger
We investigate an energy-based formulation of the two-field poroelasticity model and the related multiple-network model as they appear in geosciences or medical applications. We pr…
Continuous Galerkin Schemes for Semi-Explicit Differential-Algebraic Equations
Robert Altmann, Roland Herzog
This paper studies a new class of integration schemes for the numerical solution of semi-explicit differential-algebraic equations of differentiation index 2 in Hessenberg form. Ou…
Localization and delocalization of ground states of Bose-Einstein condensates under disorder
Robert Altmann, Patrick Henning, Daniel Peterseim
This paper studies the localization behaviour of Bose-Einstein condensates in disorder potentials, modeled by a Gross-Pitaevskii eigenvalue problem on a bounded interval. In the re…
A multiscale method for heterogeneous bulk-surface coupling
Robert Altmann, Barbara Verfürth
In this paper, we construct and analyze a multiscale (finite element) method for parabolic problems with heterogeneous dynamic boundary conditions. As origin, we consider a reformu…