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组合基本特性方程分离算法和自适应网格技术,分析二维黏性不可压流体.该方法使用3节点三角单元,对速度分量和压力等变量分析,使用等阶次的插值函数.组合解法的主要优点在于,在自适应网格技术中,对解梯度变化大的区域,通过耦合误差估计生成小的单元,利于提高解的精度,在其它区域生成大单元,可以节省时间.最后,通过对一个黏性流体圆柱体绕流问题的瞬态和稳态特性分析,给出了组合解法性能的评价.
The two-dimensional viscous incompressible fluid is analyzed by combining the basic characteristic equation separation algorithm and the adaptive grid technique.This method uses the 3-node triangular element to analyze the velocity components and pressure variables and uses the same order interpolation function. The main advantage is that adaptive grid technology can save time by generating large cells in other areas by generating small cells through coupling error estimation in small areas with large gradient changes.Finally, The transient and steady-state characteristics of a viscous fluid flow around the cylinder are analyzed, and the performance of the combinatorial solution is evaluated.