二维方腔流动问题是一个不可压缩黏性流动中典型流动。虽然目前尚不能求得它的解析解，但是它常被用来作为检验各种数值算法计算精度和可靠性的算例。文献中几乎大多数算法都对它进行过计算。在本算例中采用有限体积算法三阶迎风型 离散格式对它进行数值求解。-The problem is two-dimensional square cavity flow incompressible viscous flow in a typical flow. Although it is still analytic solution can not be obtained, but it is often used as a test of various numerical algorithm to calculate the accuracy and reliability of the numerical examples. Most algorithms are almost the literature it been calculated. Third-order upwind finite volume method using Discrete format in this example it solved numerically.