SPH numerical investigation of characteristics of hydraulic jumps

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 mo...

Full description

Saved in:
Bibliographic Details
Published in:Environmental fluid mechanics (Dordrecht, Netherlands : 2001) Netherlands : 2001), 2018-08, Vol.18 (4), p.849-870
Main Authors: De Padova, Diana, Mossa, Michele, Sibilla, Stefano
Format: Article
Language:English
Subjects:
Amplitude
Classical Mechanics
Compressibility
Correlation
Earth and Environmental Science
Earth Sciences
Environmental Physics
Hydraulic jump
Hydraulics
Hydrogeology
Hydrology/Water Resources
Laboratory experiments
Mathematical models
Numerical models
Oceanography
Original Article
Oscillations
Pressure fluctuations
Turbulence
Turbulence models
Two-equation turbulence model
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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.
ISSN:1567-7419
1573-1510
DOI:10.1007/s10652-017-9566-4