A comparative study of manhole hydraulics using stereoscopic PIV and different RANS models.
A comparative study of manhole hydraulics using stereoscopic PIV and different RANS models.
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DOI：
10.2166/wst.2018.089
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发表时间：
2018-04
期刊：
影响因子：
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通讯作者：
M. Beg;R. Carvalho;S. Tait;W. Brevis;M. Rubinato;A. Schellart;J. Leandro
中科院分区：
文献类型：
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作者：
M. Beg;R. Carvalho;S. Tait;W. Brevis;M. Rubinato;A. Schellart;J. Leandro
人孔中的流动是复杂的，可能包括具有显著湍流和涡度的旋流和再循环流。然而，这些复杂的三维流动模式如何产生不同的能量损失，从而影响更广泛的下水道网络中的流量是未知的。在这项工作中，2D 3C立体粒子图像测速测量在一个超载的缩放圆形人孔。OpenFOAM®中的计算流体动力学（CFD）模型采用四种不同的雷诺平均纳维尔-斯托克斯（RANS）湍流模型，使用流体体积模型构建，以表示该检修孔中的流动。从模型的速度分布和压力分布与实验数据进行比较，以找到最佳的建模方法。在四种不同的RANS模型中，发现重归一化群（RNG）k-ε和k-ω剪切应力输运（SST）对速度和压力的近似更好。
Flows in manholes are complex and may include swirling and recirculation flow with significant turbulence and vorticity. However, how these complex 3D flow patterns could generate different energy losses and so affect flow quantity in the wider sewer network is unknown. In this work, 2D3C stereo Particle Image Velocimetry measurements are made in a surcharged scaled circular manhole. A computational fluid dynamics (CFD) model in OpenFOAM® with four different Reynolds Averaged Navier Stokes (RANS) turbulence model is constructed using a volume of fluid model, to represent flows in this manhole. Velocity profiles and pressure distributions from the models are compared with the experimental data in view of finding the best modelling approach. It was found among four different RANS models that the re-normalization group (RNG) k-ɛ and k-ω shear stress transport (SST) gave a better approximation for velocity and pressure.