An experimental study has been conducted at the CNRS Coriolis Rotating Platform at LEGI, Grenoble, in a trapezoidal cross section channel, to investigate uni and bi-directional exchange flows. Both rotating and non rotating experiments, with a non-erodible and erodible bed layer were considered. Experimental measurements focused on obtaining high-resolution velocity and density fields in different vertical planes spanning the width of the channel using 2D Particle Image Velocimetry, Laser Induced Fluorescence, ADV and micro-conductivity probes in several channel sections. Preliminary results from the study are presented herein and consider the exchange flow dynamics at the interface, with particular focus on the observed cross-channel variations in the counter-flowing water masses and layer thickness. Further analyses are ongoing to improve understanding of the interfacial mixing and entrainment/detrainment processes, along with the bed-morphological changes initiated by interaction mechanisms between the erodible bottom boundary and the uni- or bi-directional exchange flows.
|Number of pages||9|
|Publication status||Published - 2019|
|Event||Hydralab+ Joint User Meeting - Bucharest, Romania|
Duration: 23 May 2019 → …
|Conference||Hydralab+ Joint User Meeting|
|Period||23/05/19 → …|
Adduce, C., De Falco, M. C., Cuthbertson, A., Laanearu, J., Malcangio, D., Kaur, K., Negretti, E., Sommeria, J., Valran, T., & Viboud, S. (2019). The Dynamics of Bi-Directional Exchange Flows: Implications for Morphodynamic Change within Estuaries. 1-9. Paper presented at Hydralab+ Joint User Meeting, Bucharest, Romania.