Boussinesq水波方程新型数值解法

被引:4
作者
房克照 [1 ,2 ]
孙家文 [2 ]
刘忠波 [1 ]
尹晶 [2 ]
张哲 [1 ]
机构
[1] 大连理工大学海岸和近海工程国家重点实验室
[2] 国家海洋环境监测中心
关键词
Boussinesq水波方程; 混合格式; MUSTA; HLL;
D O I
10.16483/j.issn.1005-9865.2014.02.001
中图分类号
O353.2 [波浪理论];
学科分类号
080103 ; 080704 ;
摘要
为建立高效的Boussinesq类水波数值模型,提出了一种新型的、基于有限差分和有限体积方法的混合数值格式。针对守恒形式的一维控制方程,在等间距矩形控制体内对其进行积分并离散,采用有限体积方法计算界面数值通量,剩余源项采用有限差分方法计算。其中,采用MUSTA格式并结合高精度状态插值方法计算控制体界面数值通量。时间积分则采用具有TVD性质的三阶龙格-库塔多步积分法进行。除验证模型外,重点对MUSTA格式和广泛使用的HLL格式进行了比较。结果表明,MUSTA格式可用于Boussinesq类水波方程数值求解,综合考虑数值精度、计算效率、程序编制和实际应用这几个方面,其较HLL格式更具有优势。
引用
收藏
页码:97 / 103
页数:7
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