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首页> 外文期刊>Journal of Hydraulic Engineering >Discussion of 'Numerical Oscillations in Pipe-Filling Bore Predictions by Shock- Capturing Models' by J. G. Vasconcelos, S. J. Wright, and P. L. Roe
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Discussion of 'Numerical Oscillations in Pipe-Filling Bore Predictions by Shock- Capturing Models' by J. G. Vasconcelos, S. J. Wright, and P. L. Roe

机译:J. G. Vasconcelos,S。J. Wright和P. L. Roe讨论的“通过震荡捕获模型预测管道注满孔中的数值振荡”

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摘要

The discussers wish to congratulate the authors for an illuminating exposition of numerical oscillations in the problem of a pipe-rnfilling bore. The authors presented two techniques for attenuating such numerical oscillations for wave speeds around 50 m/s.rnThe discussers wish to point out that numerical oscillations in pipe-filling bores can be minimized for wave speeds that are representative of those that can be attained in stormwater systems (e.g., 1,000 m/s) if the physical processes of bore filling are modeled appropriately. The flow regime on one side of the filling bore is pressurized flow, while the flow on the other side is free-surface flow. Therefore, an appropriate approach is to enforce the water hammer equations in the pressurized region, the Saint-Venant equations in the free-surface region, and the jump relations across the filling bore. Leon et al. (2010a,b) adopted this approach, and a finite-volume scheme to solve the water hammer as well as the Saint-Venant equations and found no unphysical oscillations even when using acoustic wave speeds as large as 1,000 m/s.
机译:讨论者希望祝贺作者就注水孔问题进行了数值振荡的启发性阐述。作者提出了两种用于衰减波速在50 m / s左右的数值振荡的技术。讨论者希望指出,对于波速可以代表的最大值,可以最小化注水孔中的数值振荡,这些波速代表了在雨水中可以达到的波速。如果对钻孔填充的物理过程进行了适当的建模,则系统(例如1,000 m / s)。填充孔一侧的流态是加压流,而另一侧的流是自由表面流。因此,一种适当的方法是在加压区域中执行水锤方程,在自由表面区域中执行Saint-Venant方程,以及在填充孔之间建立跳跃关系。 Leon等。 (2010a,b)采用这种方法,并采用有限体积方案来求解水锤以及Saint-Venant方程,即使使用高达1000 m / s的声波速度也没有发现非物理振荡。

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  • 来源
    《Journal of Hydraulic Engineering》 |2010年第6期|P.392-393|共2页
  • 作者单位

    Dept. of Civil Engineering, Boise State Univ., 1910 University, Boise, ID, 83725-2075;

    rnDept. of Civil Engineering, The Hong Kong Univ. of Science and Technology, Room 3569, Clear Water Bay, Kowloon, Hong Kong;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
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