Author(s): S. Soares Frazao; B. Spinewine; Y. Zech
Linked Author(s):
Keywords: Dam break; Digital imaging; Finite volumes; Roe scheme
Abstract: In this paper, additional experimental work on a dam-break flow through a 90°-bend is presented. Making use of a recently developed Voronoidigital imaging technique, an accurate surface velocity field could be measured. A great advantage of the technique, initially aimed at studying intense granular flows, is the non-intrusive aspect of the measurements, as well as the fact that a complete velocity field is obtained, instead of scarce point data. The reproducibility of the experiments made it possible to accumulate enough data to reconstruct a complete transient velocity field over the areas of interest. Detailed results are presented in the bend region, where a high curvature is imposed to the flow trajectories. Following the experiments, numerical simulations of the flow were run, and are compared to the measured data. The model used here solves the two-dimensional Saint-Venant shallow-water equations by a Roe-type finite-volume scheme. Those comparisons allow to gain interesting information both about the flow behaviour and the implications of the assumptions made in the numerical model.
Year: 2001