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本文提出一种已用于求解粘性和非粘性流动的很精确的交替方向(4DI)模式。用涡量—流速为变量表示的 N-S 方程非常适合于将偏微分方程组简化为线性系统的具有三对角矩阵的代数方程组,从而使控制方程具有较强的藕合。另一个优点是边壁涡量与流速场的联系是在同一时刻。该法在高雷诺数空穴流和向后差分情况中,给出了较好的流动预报结果。此外,经过某些修改,此法也已用于模拟非粘性正压模态。但其结果不如粘性流那样完善。
This paper presents a very accurate alternating direction (4DI) mode that has been used to solve both viscous and non-viscous flow. The N-S equation expressed as a variable with vorticity-flow rate is very suitable for simplifying the system of partial differential equations into algebraic systems with tridiagonal matrices in a linear system so that the governing equations are strongly coupled. Another advantage is that the relationship between vorticity at the sidewall and the velocity field is at the same time. This method gives a better prediction of the flow in the case of high Reynolds number hole flow and backward difference. In addition, this method has been used to simulate non-viscous positive pressure modalities with some modifications. But the result is not as perfect as viscous flow.