Author(s): F. Jacobsen; T. Schumacher; F. J. Campos; M. Amghar

Linked Author(s):

Keywords: Spillways; Aerated flow; CFD; LES; Physical modelling; Poisson

Abstract: The volume-of-fluid (VOF) technique was employed to develop a Computational Fluid Dynamics (CFD) model for comparison to physical measurements available from the Eildon Dam model in Australia for validations purposes. The water surface in the downstream chute of the spillway was observed to be mostly comprised of fully developed aerated flow. The free surface is physically measured as located between the mixing and upper zones, thus investigator judgement is critical to achieve reliable measurements. The mixing zone is also characterised by surface waves to complicate matters even further. A challenge arose to develop a post processing methodology that replicates as closely as possible the measuring technique used by the physical modeller for direct comparison of results, using a novel method which utilises Poisson probability of exceedance applied to the free surface.

DOI: https://doi.org/10.15142/T3GM0W

Year: 2018