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Numerical investigation of the effects of turbulence intensity on dam-break flows

机译：湍流强度对溃坝流量影响的数值研究

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摘要

Resistance to the propagating motion of water in dam-break problems increases where the flow depth becomes small, in particular, in the region close to the water front, resulting in the retardation of the surging front of water and the change in its curvature. This paper is focused on the numerical investigation of the effects of this basal resistance on the unsteady motion of dam-break flows with considering the development of turbulence. For this purpose, a volume of fluid (VOF) advection algorithm coupled with the Reynolds averaged Navier-Stokes (RANS) equations with a two-equations turbulence closure model is employed. For efficiently describing and predicting the degree of turbulence in dam-break flows, the computations are carried out with the variation of initial turbulence intensities. The present numerical observations reasonably describe the relevant physical aspects of dam-break flows, showing a satisfactory agreement in comparison with available experimental data without and with the impact of water.
机译：在溃坝问题中，当水深变小时，尤其是在靠近水边的区域中，水的传播运动的阻力会增加，从而导致水的水边上升和水曲率的变化受到阻碍。考虑到湍流的发展，本文重点研究了这种基础阻力对溃坝水流非稳态运动影响的数值研究。为此，采用了带有两方程湍流闭合模型的流体体积（VOF）对流算法和雷诺平均Navier-Stokes（RANS）方程。为了有效地描述和预测溃坝水流的湍流程度，计算时要考虑初始湍流强度的变化。目前的数值观测合理地描述了溃坝水流的相关物理方面，与无水和无水影响的现有实验数据相比，显示出令人满意的一致性。

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  • 来源
    《Ocean Engineering》 |2012年第3期|p.176-187|共12页
  • 作者

    Il-Ryong Park; Kwang-Soo Kim; Jin Kim; Suak-Ho Van;

  • 作者单位

    Department of Naval Architecture & Ocean Engineering, Dong-Eui University, 995 Eomgwangro, Busan_Jin_Gu, Busan 614-714, Korea;

    Marine Transportation System Laboratory, Maritime and Ocean Engineering Research Institute (MOERI), K0RD1, Jang-Dong 171, Yuseong-Gu, Daejon 305-343, Korea;

    Marine Transportation System Laboratory, Maritime and Ocean Engineering Research Institute (MOERI), K0RD1, Jang-Dong 171, Yuseong-Gu, Daejon 305-343, Korea;

    Marine Transportation System Laboratory, Maritime and Ocean Engineering Research Institute (MOERI), K0RD1, Jang-Dong 171, Yuseong-Gu, Daejon 305-343, Korea;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    dam-break flow; RANS; k-ε model; initial turbulence intensity; frictional drag; VOF;

    机译：溃坝流量RANS;k-ε模型;初始湍流强度摩擦阻力VOF;

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