摘要
选用计算流体力学中几种具有代表性的数值方法进行水击的分析计算,包括Lax-Friedrichs格式、Mac- Cormark格式,以及近年来广泛用于空气动力学和溃坝水力学中的TVD格式,并将计算结果与解析解进行比较,结果表明:Lax-Friedrichs格式在间断处有较大的耗散;而MacCormark格式则出现了明显的数值振荡;TVD格式具有耗散性低,且不产生虚假数值振荡的优点。
Several representative numerical computation methods of CFD are selected for analysis and computation of water-hammer,in- eluding lax-Friedrichs format,MacCormark format,as well as TVD format which is widely used in aerodynamics and dam break hydrodynamics, and the computation results are compared with analytic results.The comparison results demonstrate Lax-Friedriehs format dissipation at interrupting point,the numerical oscillation of MacCormark format computation is obvious,and TVD format computation has the advantage of low dissipation and without false numerical oscillation.
出处
《人民长江》
北大核心
2008年第18期75-76,96,共3页
Yangtze River
关键词
数值方法
间断
水击
给水管道系统
numerical simulation method
interrupting point
water-hammer
