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采用九节点四边形等参元函数实现局部坐标变换 ,采用二阶精度的 Maccorma-ck格式离散求解变换后的水流控制方程 ,建立一种平面二维数学模型。计算实例表明 ,该数学模型能够有效地计算复杂边界的河道的流速场。
The local coordinate transformation is implemented by the isoparametric function of quadrangle with nine nodes. The second-order precision Maccorma-ck scheme is used to discretize the transformed flow control equations and establish a planar two-dimensional mathematical model. The calculation example shows that the mathematical model can effectively calculate the velocity field of the river with complex boundaries.