[Back]

W. Schneider, Y. Yasuda:
"Stationary solitary waves in turbulent open channel flow - Analysis and experimental verification";
Journal of Hydraulic Engineering - ASCE, 142 (2016), 1; *.

Two-dimensional turbulent free-surface flow with Froude numbers close to 1 is considered. The roughness of the bottom of the channel is allowed to vary with the space coordinate, leading to small variations in the bottom friction coefficient. In a predecessor of the present paper, an extended Korteweg-deVries (KdV) equation for the surface elevation was derived by means of an asymptotic analysis which is free of turbulence modeling. The steady-state version of the extended KdV equation has solutions that describe stationary solitary waves. In the present paper, previous results of the analysis are extended with the aim of providing a basis for the experimental investigations. A comparison of measured surface elevations with theoretical predictions is shown, and possible sources of small discrepancies are discussed. In an appendix, the structure of solutions that describe solitary waves with a tail is investigated.

Turbulent flow, Surface waves, Two-dimensional flow, Friction, Froude number, Hydraulic roughness, Free surfaces, Solitary Waves

http://dx.doi.org/10.1061/(ASCE)HY.1943-7900.0001056#sthash.Hweig4iq.dpuf

Project Head Wilhelm Schneider:
AIC Androsch International Management Consulting GmbH Forschung auf dem Fachgebiet Strömungsmechanik und Thermodynamik