【摘要】 非结构的三角形网格适应于复杂不规则的边界,在此基础上采用有限体积法离散浅水波方程,并结合有限差分法建立了一种新的离散格式,使得界面通量计算达到二阶精度。通过对典型算例的模拟计算,此格式在溃坝计算中能很好地捕捉溃坝波的前进,具有很强的模拟间断的能力,模拟溃坝洪水波间断的形状和位置都能得到很满意结果。更多还原

【Abstract】 The unstructured triangular mesh adapts to complex irregular boundary.Based on this,adopting finite volume method to discrete shallow water equation and combining with the finite difference method,this paper has developed a new discrete format that caused the interface flux to achieve second-order precision.Through simulating and calculating typical example,this format can well catch the wave advance of dam-break,has strong ability of simulating gap,and can get satisfactory results in simulating the discontinuous shape and location of flood wave of dam-break.更多还原