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采用非结构化网格有限容积法求解了不可压N-S方程组,对流项采用GAMMA格式,扩散项采用二阶中心差分格式建立离散方程,用SOAR算法处理压力与速度的耦合关系,得到了一种求解不可压N-S方程的非结构网格耦合求解器。通过方腔顶盖驱动流、后台阶绕流以及方腔自然对流等几个典型的算例,考察了求解器的计算精度及收敛特性,并与SIMPLE算法进行了比较,结果表明该求解器是有效可行的。
The unstructured grid finite volume method is used to solve incompressible Navier-Stokes equations. The convection term is GAMMA. The second order central difference scheme is used to establish the discrete equation. The SOAR algorithm is used to deal with the coupling between pressure and velocity. Unstructured grid coupled solver for solving incompressible Navier - Stokes equations. The calculation accuracy and convergence characteristics of the solver are investigated by several typical examples, such as the driving flow in the top of the cavity, the back flow around the cavity and the natural convection in the cavity. The solver is compared with the SIMPLE algorithm. The results show that the solver is Effective and feasible.