A finite element mesh truncation technique for scattering and radiation problems in HPC environments

An in-house electromagnetic code based on the finite element method (FEM) called HOFEM, a higher order finite element method, has been developed by the authors in the last years. HOFEM has been developed to work in high-performance computing (HPC) environments. Among other features, it makes use of a non-standard mesh truncation technique for open region wave propagation problems as those of scattering and radiation. This mesh truncation technique works in an iterative fashion providing an asymptotically exact absorbing boundary condition while minimizing the size of the FEM domain and preserving the original sparse nature of the finite element matrices. Thus, it is suitable for large scale computations. Numerical results obtained on an HPC system corresponding to the scattering analysis of the radar cross section of a military helicopter are shown.