大规模粒子模拟的后处理与可视化

Post-process and visualization of large-scale particle simulation

近年来,高性能计算与并行技术取得了很大的进展,粒子模拟的数据规模也随之快速增长,目前已达到10亿粒子以上,对其模拟结果的可视化已远远超出了单机的处理能力范围。为实现大规模粒子模拟结果的后处理与可视化,本文采用了并行处理和LOD两种技术,其中并行处理部分采用数据并行的方式,突破了单机处理能力的限制;LOD技术使用户能够控制进入可视化流水线的数据规模,从而减轻了可视化流水线的负担并加快了绘制速度。本文初步实现了大规模粒子模拟结果的可视化,为下一步工作奠定了基础。

Visualization is an important method to help people understand the result of numerical simulation. With fast development of high performance and parallel computing techniques, the data scale of particle simulation is increasing rapidly, and recently it has reached 1 billion. That is a new challenge to the post-processing and visualization systems since the data scale is beyond a single computer＇s capability. In order to deal with large-scale result of particle simulation, parallel and LOD techniques are used in this paper： data parallel is used to break the limit of single computer, while LOD technique reduces the load of the visualization pipeline. With both of them a visualization system for large-scale particle simulation has been implemented.