Contributions to Books:
D. Boffi, L. Gastaldi, M. Ruggeri:
"Mixed formulation for interface problems with distributed Lagrange multiplier";
in: "ASC Report 19/2014",
issued by: Institute for Analysis and Scientific Computing;
Vienna University of Technology,
We study a mixed formulation for elliptic interface problems which has been recently introduced when dealing with a test problem arising from fluid-structure interaction applications. The formulation, which involves a Lagrange multiplier defined in the solid domain, can be approximated by standard finite elements on meshes which do not need to fit with the interface. In this paper we discuss a modification of the original formulation involving a different approach for the analysis and the numerical implementation of the Lagrange multiplier. New two-dimensional numerical results confirm the good performances of the proposed schemes.
interface problems, finite elements, fluid-structure interaction, Lagrange multiplier
Electronic version of the publication:
Created from the Publication Database of the Vienna University of Technology.