摘要
微分求积方法(DQM)已成功地应用于数值求解流体力学中的许多问题· 但是已有的工作大多限于正规区域的流动问题,同时缺少用迎风机制来描述流体流动的对流特性· 该文对一个不规则区域中的不可压缩层流和热迁移的耦合问题给出了一种具有迎风机制的局部微分求积方法,对通过边界和坐标不平行的收缩管道中的流体,只用少数网格点得到了比较好的数值解· 和有限差分方法(FDM)相比较,这一方法具有计算工作量少。
The differential quadrature method (DQM) has been applied successfully to solve numerically many problems in the fluid mechanics. But it is only limited to the flow problems in regular regions. At the same time, here is no upwind mechanism to deal with the convective property of the fluid flow in traditional DQ method. A local differential quadrature method owning upwind mechanism (ULDQM) was given to solve the coupled problem of incompressible viscous flow and heat transfer in an irregular region. For the problem of flow past a contraction channel whose boundary does not parallel to coordinate direction, the satisfactory numerical solutions were obtained by using ULDQM with a few grid points. The numerical results show that the ULDQM possesses advantages including well convergence, less computational workload and storage as compared with the low-order finite difference method.
出处
《应用数学和力学》
CSCD
北大核心
2004年第10期1033-1041,共9页
Applied Mathematics and Mechanics
基金
上海市重点学科建设资助项目
