弯道水流的三维数值模拟

本文提出一种弯道水流的三维数学模型,该模型以N—S方程为基础,对弯曲段采用园柱坐标形式的方程,方程中的压力项采用静压假定作近似处理,紊动粘胜系数利用Prandu混合长紊流模型来确定。本模型能较好地再现实际流场的主要特征,具有一定的可信度。

Three-Dimensional Solution of Flow in Curved Channel

In this paper a new 3-D numerical solution of flow in curved channel is presented. The numerical solution is based on N—S equation and a sylindrical -co-ordinate system is used for curved channel. Hydrostatic pressure is used in equation as an approxination, and Prandtl's Mixinglength turbuance model is applied. The flow phenomena are reproduced in the laboratory curved channsl with satisfactory results.