Development of Parallel Program of Two-dimensional Flow-sediment Mathematical Model for Long River Reach

摘要

In order to meet technical requirements for systematic regulation to long reach of the Yangtze River, parallel program to computing core part of the software is developed based on TK-2DC software, which mainly contains parallelization research on flow convection diffusion model and sediment convection diffusion model. This parallel program conducts parallel programming on the basis of MPI. The whole parallel computing part adopts peer mode and corresponding special processing is performed to solving method of equation and special points so as to obtain better parallel speedup and parallel efficiency. Parallel program has been tested by relying on channel regulation engineering related to Jingjiang reach in the middle reach of the Yangtze River. Test results shows that parallel efficiency with 8 CPU is up to 80% and parallel speedup can reach 4.98. Flow-sediment analog computing efficiency of long river reach is greatly improved.