中国科学院 | 大气所 | 网站地图 | 加入收藏
首 页  | | | 论文论著 | | 科学传播 | English  
  新闻信息
最新消息
新闻搜索
最新消息 您当前所在的位置: 首页 > 新闻信息 > 最新消息
湖南大学杨海建教授在我室报告
来源:LASG    访问次数:    更新时间:2018-11-6

A Parallel and Highly Scalable Framework for Atmospheric Simulation on Parallel Computers

杨海建 教授
湖南大学

新楼1118会议室
2018年11月6日(星期二)9:00

报告会主持人:秦佩华 副研究员

Abstract
Predictive simulations are crucial for the success of atmospheric modeling, and it is highly desirable to obtain accurate non-negative solutions for the transport problem on the sphere in these numerical simulations. However, most existing approaches do not ensure the predicted tracer fraction to stay within the physical range, which will seriously ruin the numerical accuracy and physical significance of the simulation. In this talk, a parallel, highly scalable, Eulerian framework based on the variational inequality method is developed for the tracer transport on the sphere. More precisely, the proposed algorithmic framework involves an implicit, variational inequality discretization for naturally satisfying the basic boundedness requirement, and a nonlinearly preconditioned semismooth Newton algorithm with a domain decomposition based linear solver for the resultant nonlinear system. We numerically show that the proposed Eulerian framework is robust and highly scalable, in terms of the total computing time for solving the problem with hundreds of millions of unknowns and on a supercomputer with over 10,000 processor cores.

 
© 1997-2010 大气科学和地球流体力学数值模拟国家重点实验室 版权所有 京ICP备06004370号
北京9804信箱LASG 邮编:100029 传真:82995172