北京赛车pk拾开奖直播-北京赛车pk拾开奖结果记录-Welcome热购

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发布者妊帮和:文明办作者席矩:发布时间请毖:2019-06-24浏览次数超闪携:841


主讲人寐坡裁:鞠立力提,University of South Carolina 教授


时间洼忿敬:2019年7月1日15体哭浚:30


地点界:徐汇校区3号楼332


举办单位坷不:数理学院


内容介绍困吻:In this talk we present explicit local time-stepping (LTS) schemes with second  and third order accuracy for the shallow water equations. The system is  discretized in space by a C-grid staggering method, namely the TRiSK scheme  adopted in MPAS-Ocean, a global ocean model with the capability of resolving  multiple resolutions within a single simulation. The time integration is  designed based on the strong stability preserving Runge-Kutta (SSP-RK) methods,  but different time step sizes can be used in different regions of the domain  through the coupling of coarse-fine time discretizations on the interface, and  are only restricted by respective local CFL conditions. The proposed LTS schemes  are of predictor-corrector type in which the predictors are constructed based on  Taylor series expansions and SSP-RK stepping algorithms. The schemes preservpk10精准计划“一百九十八。”“可万一……”e  some important physical quantities in the discrete sense, such as exact  conservation of the mass and potential vorticity and conservation of the total  energy within time truncation errors. Moreover, they inherit the natural  parallelism of the original explicit global time-stepping schemes. Extensive  numerical tests are presented to illustrate the performance of the proposed  algorithms.

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