Numerical modelling of supercritical flow in circular conduit bends using SPH method

IF 3.4 3区工程技术 Q1 MECHANICS 水动力学研究与进展:英文版 Pub Date : 2017-04-01 DOI:10.1016/S1001-6058(16)60744-8

Nikola M. Rosić , Milena B. Kolarević , Ljubodrag M. Savić , Dejana M. Đorđević , Radomir S. Kapor

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引用次数: 2

Abstract

The capability of the smoothed-particle hydrodynamics (SPH) method to model supercritical flow in circular pipe bends is considered. The standard SPH method, which makes use of dynamic boundary particles (DBP), is supplemented with the original algorithm for the treatment of open boundaries. The method is assessed through a comparison with measured free-surface profiles in a pipe bend, and already proposed regression curves for estimation of the flow-type in a pipe bend. The sensitivity of the model to different parameters is also evaluated. It is shown that an adequate choice of the artificial viscosity coefficient and the initial particle spacing can lead to correct presentation of the flow-type in a bend. Due to easiness of its implementation, the SPH method can be efficiently used in the design of circular conduits with supercritical flow in a bend, such as tunnel spillways, and bottom outlets of dams, or storm sewers.

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用SPH方法模拟圆形管道弯道内超临界流动

考虑了光滑颗粒流体力学(SPH)方法模拟圆弯道超临界流动的能力。利用动态边界粒子(DBP)的标准SPH方法，在原有算法的基础上进行开放边界的处理。通过与弯道自由表面实测曲线的比较，以及已经提出的用于估计弯道流动类型的回归曲线，对该方法进行了评估。并对模型对不同参数的敏感性进行了评价。结果表明，适当选择人工黏度系数和初始颗粒间距可以正确地表示弯道内的流型。由于SPH方法易于实现，可以有效地应用于弯道内具有超临界流的圆形管道的设计，如隧道溢洪道、大坝底出口、雨水沟等。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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