计算液压模型的基准,用于带有侧腔腔的开放通道流量
Pablo Ouro1, Luis Cea2, Sergio Croquer3
1School of Engineering, The University of Manchester, Manchester, UK.
Journal of hydraulic research
|May 22, 2025
概括
这项研究比较了六个计算流体动力学模型用于水环境工程. 尽管计算成本更高,但三维模型在具有空洞的开放通道流中提供了改进的速度预测.
科学领域:
- 水环境工程是水环境工程.
- 计算流体动力学 计算流体动力学
- 开放通道流量建模
背景情况:
- 存在多种不同的计算模型用于水环境工程,包括2D浅水,3D流 (RANS,LES) 和基于粒子的方法.
- 精确预测复杂流动中的平均速度和自由表面动态对于工程应用至关重要.
研究的目的:
- 为了进行六种不同的计算液压流体动力学模型的首次比较.
- 评估模型性能,预测带侧空洞的开放通道流中的平均速度和自由表面动态.
主要方法:
- 六个模型的比较:Iber +,HO-SWM,GBVC,OpenFOAM (RANS),Hydro3D (LES) 和DualSPHysics (SPH). 这三种模型的比较结果是:
- 适用于两个基准案例,涉及具有对称侧腔的开放通道流.
- 计算成本相对于模型复杂性的量化.
主要成果:
- 浅水模型捕捉了大规模的洞内流动结构,但与3D模型相比,显示了更广泛的剪切层和更高的主通道速度.
- 三维模型 (RANS,LES,SPH) 对实验数据进行了改进的平均速度预测.
- 大多数模型捕捉横向静止波;浅水模型与理论值相匹配,而3D模型稍微高估了它.
结论:
- 三维模型在这些特定的流量条件下为平均速度提供了更高的准确性.
- 模型选择涉及预测准确性和计算成本之间的权衡,复杂性表现为对数式成本增长.
- 根据具体需求,进一步的研究可以根据特定需求完善水环境工程应用的模型选择.
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