为提高有交界面流动问题的计算精度 ,通过引入不分裂的界面推进 ,对现有的 Youngs算法 (流体体积法的一种 )进行改进 ,推导其算法公式。在此基础上 ,分别用 Donor-Acceptor算法、分裂和不分裂的 Youngs算法计算典型算例。几种计算结果比较后表明 :不分裂 Youngs算法在空间和时间上都具有较高精度 ,能够更有效地跟踪流体界面 In order to improve the computational accuracy of the interface flow problem, the existing Youngs algorithm (a kind of fluid volume method) is improved and the algorithm formula is deduced by introducing a non-fractured interface. On this basis, we use Donor-Acceptor algorithm, split and non-split Youngs algorithm to calculate typical examples. Comparisons of several calculation results show that the non-split Youngs algorithm has higher accuracy in both space and time and can track the fluid interface more effectively