高层建筑周围定常风场的数值模拟

Numerical simulation of steady wind flow around high buildings

通过对高层建筑周围定常风场的数值模拟与原型试验结果的比较,分析了在进行数值模拟时,入口边界条件和湍流模型等因素对计算结果的影响。模拟结果表明,入口边界条件和湍流模型均对模拟结果具有较大影响。其中,入口边界条件中速度分布对计算结果的影响大于湍流强度分布对计算结果的影响,而RNGk-ε湍流模型的计算精度优于标准k-ε湍流模型。

Compared numerical simulation of steady wind flow around high buildings with full-scale building tests,the effect of inlet boundary condition and turbulence model on results is analysed.The results show that the effect of the two factors are both obvious.The effect of velocity distribution is larger than turbulence intensity and the calculation precision of RNG κ-ε turbulence model is better than standard κ-ε rbulence model.