Block-structured, equal-workload, multi-grid-nesting interface for the Boussinesq wave model FUNWAVE-TVD (Total Variation Diminishing)

Abstract. We describe the development of a block-structured, equal-CPU-load (central processing unit), multi-grid-nesting interface for Boussinesq wave model FUNWAVE-TVD (Fully Nonlinear Wave Model with Total Variation Diminishing Solver). The new framework does not interfere core solver, and thus program, FUNWAVE-TVD, is still standalone used single grid. nesting manages time sequencing two-way processes between parent grid child refinement in hierarchical manner. Workload balance MPI-based (message passing interface) parallelization handled by an equal-load scheme. A strategy shared array allocation applied data management that allows large number nested grids without creating additional memory allocations. Four tests are conducted to verify algorithm assessments accuracy robustness application modeling transoceanic tsunamis coastal effects.