Fig. 1
From: A hybrid interface preconditioner for monolithic fluid–structure interaction solvers
Problem statement adopted from [25]—Left: The domain \(\Omega \) is subdivided into a fluid domain 
and a structural domain 
by the fluid-structure interface \(\Gamma _\mathrm {FSI}\). Both subdomains are bounded by Dirichlet boundaries 
and 
, Neumann boundaries 
and 
, and the common fluid-structure interface \(\Gamma _\mathrm {FSI}\), respectively. Right: At the interface, kinematic continuity as well as equilibrium of interface traction fields 
and 
are required