TY - GEN
T1 - Experimental study of a vortex generated at the edge of a channel with a step
AU - López-Sánchez, E. J.
AU - García-Molina, C. D.
AU - Ruiz-Chavarría, G.
AU - Medina, A.
N1 - Publisher Copyright:
© Springer International Publishing Switzerland 2016.
PY - 2016
Y1 - 2016
N2 - At the outlet of estuary-like systems, three vortices are formed: a dipole and a spanwise vortex. The spanwise vortex is formed due to the separation of the bottom boundary layer, just in front of the dipole. If a step occurs at the bottom in the channel output, a single vortex will be formed, the dipole becomes a part of a structure having a horseshoe shape. In a periodic driving flow, after a while this structure results in a dipole and a spanwise vortex. To study in laboratory this kind of vortices we made experiments in a system consisting of two domains connected by a channel in which the flow is induced by a periodic forcing. The channel layer depth is different with respect the depth in the two others domains. In order to investigate this system some measurements of velocity field using PIV were carried out in the vertical plane passing along the channel centerline. On the other hand, the detection of vortices composing the dipole was made with the synthetic Schlieren method. Vortices are lowpressure regions, then they produce a deformation of the free surface which can be detected with this method. We observed that at the channel output a horseshoe vortex is formed by the flushing into the open domain. This structure remains for some time, after it decomposes in a dipole and a spanwise vortex. Finally all three vortices are destroyed.
AB - At the outlet of estuary-like systems, three vortices are formed: a dipole and a spanwise vortex. The spanwise vortex is formed due to the separation of the bottom boundary layer, just in front of the dipole. If a step occurs at the bottom in the channel output, a single vortex will be formed, the dipole becomes a part of a structure having a horseshoe shape. In a periodic driving flow, after a while this structure results in a dipole and a spanwise vortex. To study in laboratory this kind of vortices we made experiments in a system consisting of two domains connected by a channel in which the flow is induced by a periodic forcing. The channel layer depth is different with respect the depth in the two others domains. In order to investigate this system some measurements of velocity field using PIV were carried out in the vertical plane passing along the channel centerline. On the other hand, the detection of vortices composing the dipole was made with the synthetic Schlieren method. Vortices are lowpressure regions, then they produce a deformation of the free surface which can be detected with this method. We observed that at the channel output a horseshoe vortex is formed by the flushing into the open domain. This structure remains for some time, after it decomposes in a dipole and a spanwise vortex. Finally all three vortices are destroyed.
UR - http://www.scopus.com/inward/record.url?scp=84978916781&partnerID=8YFLogxK
U2 - 10.1007/978-3-319-27965-7_3
DO - 10.1007/978-3-319-27965-7_3
M3 - Contribución a la conferencia
SN - 9783319279640
T3 - Environmental Science and Engineering (Subseries: Environmental Science)
SP - 25
EP - 36
BT - Recent Advances in Fluid Dynamics with Environmental Applications
A2 - Sigalotti, Leonardo Di G.
A2 - Medina, Abraham
A2 - López, Abel
A2 - Klapp, Jaime
A2 - Ruiz-Chavarría, Gerardo
PB - Kluwer Academic Publishers
T2 - 1st Conference on Spring School Enzo Levi, 2014
Y2 - 12 May 2014 through 13 May 2014
ER -