libEMM: A fictious wave domain 3D CSEM modelling library bridging sequential and parallel GPU implementation

This paper delivers a software -libEMM -for 3D controlled-source electromagnetics (CSEM) modelling in fictitious wave domain, based on the newly developed high-order finite-difference time-domain (FDTD) method on non-uniform grid. The numerical simulation can be carried out over a number of parallel processors using MPI-based high performance computing architecture. The FDTD kernel coded in C has been parallelized with OpenMP for speedup using local shared memory. In addition, the software features a GPU implementation of the same algorithm based on CUDA programming language, which can be cross -validated and compared in terms of efficiency. A perspective of libEMM on the horizon is its application to 3D CSEM inversion in land and marine environment.Program summaryProgram Title: libEMMCPC Library link to program files: https://doi .org /10 .17632 /p769t7c5bk.1Developer's repository link: https://github .com /yangpl /libEMM Licensing provisions: GNU General Public License v3.0Programming language: C, CUDA, Fortran, ShellExternal dependencies: MPI [1], FFTW [2], CUDA [3]Nature of problem: Controlled-source electromagnetics (CSEM) Solution method: High-order finite-difference time-domain (FDTD) on non-uniform grid by fictious wave domain transformation References[1] https://www.mpich .org/[2] http://fftw.org/[3] https://developer.nvidia .com /cuda -toolkit (c) 2023 Elsevier B.V. All rights reserved.