02 - Domain Decomposition#
Description#
Compare 1D sliced decomposition and 3D cubic decomposition strategies for parallel domain partitioning. This experiment tests domain decomposition logic - partitioning across MPI ranks, local to global indice mapping, and how ghost zones are structured.
Sliced (1D): Splits domain along Z-axis with horizontal slices, exchanging 2 ghost planes.
Cubic (3D): Uses 3D Cartesian grid across all dimensions, exchanging 6 ghost faces.
Purpose#
Determine which decomposition strategy provides better performance for different problem sizes and rank counts by analyzing: Get an understanding of how the type of domain decomposition impacts the size of the data that needs to be communicated between ranks along with the ‘connectivity’ of different ranks.
Visual comparison - Illustrate how the domain is partitioned for each method
Surface-area-to-volume ratios - investigate how much data needs to be communicated between ranks depending on the decomposition strategy
