下游为干河床的溃坝水流数值模拟

Numerical simulation of dam-break current flowing in dry bed

应用二阶TVD MacCormack格式计算了含间断波的二维浅水流动.模拟算例为下游是干河床、瞬间部分坝体溃决形成的溃坝水流运动.针对该格式,采用恰当的限制器使得解既不产生过大耗散,又具有高分辨率.

A secondorder Total Variation Diminishing (TVD) MacCormack scheme is presented for the computation of twodimensional shallow water flow with discontinuous waves. The numerical model is applied to the dambreak current due to partial dam breach flowing in downstream dry bed. In order to produce less dissipation and to get high accurate results, a proper limiter is adopted.