Vortex Flows and Related Numerical Methods II
ESAIM: Proceedings,
Vol. 1, 1996, pp. 377-386
Numerical Simulation of the Starting Flow
Down a Step
Rodrigue Savoie, Yves Gagnon
Université de Moncton, Campus d'Edmundston
Edmundston (NB), Canada
Yves Mercadier
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.
Vortex Flows and Related
Numerical Methods II
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