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Issue ESAIM: Proc.
Volume 1, 1996
Vortex flows an related numerical methods II
Page(s) 377 - 386
DOI http://dx.doi.org/10.1051/proc:1996028

ESAIM: Proc., 1996, Vol. 1, pp. 377-386
DOI: 10.1051/proc:1996028

Numerical simulation of the starting flow down a step

Rodrigue Savoie1, Yves Gagnon1 and Yves Mercadier2

1  Université de Moncton, Campus d'Edmundston Edmundston (NB), Canada
2  Département de génie mécanique Université de Sherbrooke Sherbrooke (Qc), Canada


Abstract
The starting flow down a step in an open channel is simulated using a vortex method. A mixed Eulerian-Lagrangian scheme based on the vortex-in-cell algorithm and random walk diffusion is used with a non-uniform mesh. The comparison of numerical and experimental instantaneaous streamline plots show good agreement, especially for early stages of the flow development. It is also shown that, during intermediate stages of the flow development and for the range of Reynolds numbers investigated, the distance from the step to the reattachment point of the main vorticity domain increases linearly with the dimensionless time. Again, good agreement is obtained between experimental data and computed solutions.



© EDP Sciences, ESAIM 1996


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