An OpenMP implementation of the MuMM solver for porous media flow problems
Sérgio Felipe Ferreira Silva, Hanna Thaina Prates Arimatéia, Alexandre Santos Francisco, Weslley Luiz da Silva Assis · Revista Mundi Engenharia Tecnologia e Gestão (ISSN 2525-4782) · 2020
Multiscale methods are usually developed for solving second-order elliptic problems in which coef?cients are of multiscale heterogeneous nature. The Multiscale Mixed Method (MuMM) was introduced aiming at the ef?cient and accurate approximation of large ?ow problems in highly heterogeneous porous media. In the MuMM numerical solver, ?rst mixed multiscale basis functions are constructed, and next global domain decomposition iterations are performed to compute the discrete solution of the problems. However, this iterative procedure is a time-consuming step. In this paper, the authors improve the MuMM solver through the implementation of parallel computations in the step concerning the global iterative procedure. The parallel version of the solver employs the application programming interface Open Multi-Processing (OpenMP). The implementation with the OpenMP reduces signi?cantly the computational effort to perform the domain decomposition iterations, as indicated by the numerical results.