适配国产多节点GPU的二维非结构高性能水动力模型OA

To meet the computational demands of numerical flood simulation under China's information technology innovation initiative,this study proposes a high-performance two-dimensional unstructured hydrodynamic model designed for domestic multi-node GPU clusters.The model is based on a Godunov-type finite volume scheme and is implemented in C++using the Heterogeneous-Compute Interface for Portability(HIP)framework,enabling efficient acceleration on domestic GPUs.METIS-based domain decomposition and the message passing interface(MPI)are adopted to support collaborative computation across multiple GPUs and computing nodes,thereby improving parallel computing efficiency.Numerical tests using the classical rectangular dam-break benchmark and the Toce River case demonstrate that the model achieves satisfactory accuracy,stable computation,and reliable inter-domain communication.Field application to Hengshan Reservoir in Jiangsu Province further shows that,for a meter-scale simulation containing 15 million mesh cells,the use of 64 GPUs across 16 nodes reduced the total runtime from 3.76 h to 15 min.This result indicates a substantial improvement in computational efficiency for large-scale,high-resolution flood simulation,reducing runtime from the hourly scale on a single GPU to the minute scale on a multi-node GPU cluster.With compatibility across domestic hardware and software environments,the proposed model has strong potential for engineering applications in high-resolution flood modeling.