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首页> 外文会议>WSEAS International Conference on Renewable Energy Sources >Bridges and Environment: Development of an Iterative Scouring Procedure for Implementation in CFD Code for Different Bridge Flooding Conditions
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Bridges and Environment: Development of an Iterative Scouring Procedure for Implementation in CFD Code for Different Bridge Flooding Conditions

机译：桥梁和环境：开发在不同桥洪水条件下的CFD代码中实施迭代冲洗程序

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The objective of this study was to develop a simulation model to predict the final shape and size of scour-pit under the flooded bridge deck. A computational methodology has been developed in C++ code and implemented in STAR-CD, a commercial CFD application software, using a BASH script in UNIX environment. For the evolution of the scour-pit shape and depth, a single-phase (re)moving boundary formulation has been developed, based on the computational fluid dynamics analysis of the flow fields around the flooded bridge deck and the shear stress at the bottom-wall, using the High Reynolds nolds number k -ε turbulence model with standard wall function. The "scouring tool" was assumed to be the excess shear stress over the critical shear stress, the latter corresponding to the scoured bottom-wall material structure. Comparison with limited experimental data obtained from Turner-Fairbanks Highway Research Center, McLean, VA, USA, revealed larger discrepancies than expected; however, the developed iterative scouring methodology works well with the commercial CFD software and has potential for further enhancement, by including other flow parameters influencing complex scouring process, in addition to the shearing stresses.
机译：本研究的目的是开发一种模拟模型，以预测淹没桥甲板下的浅坑的最终形状和尺寸。在C ++代码中已在C ++代码中开发了计算方法，并在Star-CD中实现了商业CFD应用软件，使用UNIX环境中的Bash脚本。对于泡坑形状和深度的演变，基于洪水桥甲板周围的流动场和底部的剪切应力的流动场的计算流体动力学分析，开发了单相（RE）移动边界配方。墙壁，使用具有标准壁函数的高雷诺NOODS Number k-ε湍流模型。假设“擦除工具”是在临界剪切应力上的过度剪切应力，后者对应于彻底的底壁材料结构。与USB，VA，美国麦克莱恩，麦克莱恩高速公路高速公路研究中心获得的有限实验数据的比较显示比预期更大的差异;然而，除了剪切应力之外，开发的迭代练习方法适用于商业CFD软件以及进一步增强的潜力，并且还通过包括影响复合擦除过程的其他流量参数。

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