Stable Conservative Multidomain Treatments for Implicit Euler Solvers

Multidomain treatments are studied in order to solve the steady compressible Euler equations using implicit time-dependent finite volume methods on block-structured grids. Unconditionally GKS-stable and conservative treatments are proposed for continuous and discontinuous 1D matchings and extended to 2D patched grids. Efficiency of the present interface conditions is demonstrated through transonic flow calculations over single- and two-element airfoils.