SPH numerical investigation of characteristics of hydraulic jumps

被引：0
作者：
Diana De Padova
Michele Mossa
Stefano Sibilla
机构：
[1] Polytechnic University of Bari,Department of Civil, Environmental, Land, Building Engineering and Chemistry (DICATECh)
[2] University of Pavia,Department of Civil Engineering and Architecture
来源：
Environmental Fluid Mechanics | 2018年 / 18卷
关键词：
Hydraulic jumps; Smoothed particle hydrodynamics models; Oscillating characteristics;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
In the present work, oscillating characteristics and cyclic mechanisms in hydraulic jumps are investigated and reproduced using a weakly-compressible XSPH scheme which includes both an algebraic mixing-length model and a two-equation turbulence model to represent turbulent stresses. The numerical model is applied to analyze oscillations of different hydraulic jump types based on the laboratory experiments. The comparison between SPH and experimental results shows an influence of different turbulence models on the amplitude spectrum and peak amplitude of the time-dependent surface elevation upstream and downstream of the hydraulic jump. By analyzing a single cycle of the oscillating phenomena of a hydraulic jump it is possible to indicate their correlation with the vortex structures of the roller. Furthermore, analysis of the oscillating phenomena indicates a correlation among the surface profile elevations, velocity components and pressure fluctuations. This observation leads to conclude that oscillations phenomena are particularly important for analysis of the turbulence characteristics.
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收藏
页码：849 / 870
页数：21
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