摘要
基于二维非定常不可压缩雷诺平均N-S方程,采用RNG(renormalization group)k-ε两方程湍流模型,对矩形渡槽在空槽和满槽情况下的二维绕流特性进行了分析。计算网格为四边形结构网格,采用有限体积法对微分方程进行离散,应用SIMPLE算法解决压强-速度耦合关系。引入空腔流动研究成果对空槽和满槽风载体形系数基本相同的原因进行了理论分析,揭示了空槽时槽体内复杂的旋涡流动结构。
Flow characteristics of the rectangular aqueduct was numerically studied using two-dimensional unsteady Reynolds averaged incompressible Navier-Stokes equations combined with the RNG （renormalization group） k-ε turbulence model. Two situations are considered including empty and full depth of the aqueduct. Quadrilateral grid was used to divide the computational domain. The finite volume technique was adopted to discretize the governing differential equations. The pressure-velocity field was coupled using the SIMPLE algorithm. The reason for wind load shape coefficients are very close under previous two conditions is explained by introducing the research results of driven cavity flows. Also we obtain the vortex structure in the aqueduct for empty condition.
出处
《实验流体力学》
EI
CAS
CSCD
北大核心
2006年第3期53-58,共6页
Journal of Experiments in Fluid Mechanics
基金
西南交通大学博士生创新基金
关键词
空腔流
旋涡
矩形渡槽
数值模拟
driven cavity flows
vortex
rectangular aqueduct
numerical simulation
