Roll waves in floods on inclines

The unstable nature of kinematic waves, resulting from outburst floods on steep inclines, is investigated theoretically using the shallow water equations. A numerical experiment is designed in order to efficiently perform a stability analysis. By analysing the linear and non-linear numerical evolution of small perturbations, it is possible to reveal how the nature of the ensuing flow depends not only on the Froude number but also on non-parallel and time-varying characteristics of the background flow. It is also demonstrated that these effects stabilize turbulent roll-waves and raise the critical Froude number required for instability.


Editor(s):
Garcia-Navarro, P.
Playan, E.
Published in:
Proceedings of Numerical Modelling of Hydrodynamics for Water Resources, 361–366
Presented at:
Numerical Modelling of Hydrodynamics for Water Resources, Zaragoza, España, June 18-21, 2007
Year:
2007
Publisher:
London, Taylor and Francis
Keywords:
Laboratories:




 Record created 2008-12-06, last modified 2018-09-13

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