PARALLEL NUMERICAL SIMULATION OF PYROCLASTIC FLOW DYNAMICS AT VESUVIUS

摘要

The study performed focuses on the development and application of a parallel multiphase fluid dynamic code for the simulation of the transient 2D dynamics of pyroclastic flows, one of the most hazardous phenomena occurring during explosive volcanic eruptions. The parallelization strategy adopted is based on a domain decomposition of the real space grid using a SPMD paradigm within a message passing scheme. The speed-up of the parallel code has been tested against the number of processors, the size of the computational grid, the computational platform, and the domain decomposition criterion. The results obtained show a good scalability and portability of the parallel code and indicate a promising 3D extension of the model.