GAMMA格式及DATE方法在SIMPLE算法中的应用  

Application of GAMMA scheme and DATE method in SIMPLE algorithm

作　　者：向小华[1] 苏长城[2] 王船海[1] 吴晓玲[1] 

机构地区：[1]河海大学水文水资源与水利工程科学国家重点实验室,江苏南京210098 [2]江苏省水利厅规划办公室,江苏南京210029

出　　处：《河海大学学报（自然科学版）》2008年第4期471-474,共4页Journal of Hohai University(Natural Sciences)

基　　金：国家科技支撑计划课题(2006BAC05B02)

摘　　要：为了提高N-S方程数值计算的精度并解决压力-速度的耦合问题,将GAMMA格式、DATE方法与SIMPLE算法相结合,得到了一种高精度非结构同位网格下的SIMPLE算法.该算法用GAMMA格式离散对流项,用DATE方法处理方程求解过程中压力-速度的耦合问题,可以弥补传统动量插值法不能处理强非线性压力场的不足,保证对流项离散的稳定性及高精度特性.In order to improve the accuracy and deal with the pressure-velocity coupling in the numerical solution of N-S equations, a high accuracy SIMPLE algorithm is developed for unstructured collocated grids through an integration with the GAMMA scheme and DATE method. The convective flux is evaluated using the GAMMA scheme for the stability and high accuracy of the convection tenn. The pressure-velocity coupling is solved with the DATE method, which overcomes the defect of the traditional momentum interpolation method in strong nonlinear pressure fields.

关 键 词：N-S方程 GAMMA格式 DATE方法 SIMPLE算法 非结构同位网格 

分 类 号：TV131.4[水利工程—水力学及河流动力学]