Experimental study of internal mixing and near-bed dynamics induced by restricted stratified exchange flows

TY - GEN

T1 - Experimental study of internal mixing and near-bed dynamics induced by restricted stratified exchange flows

AU - Carr, Magda

AU - Cuthbertson, Alan

AU - Laanearu, Janek

AU - Sommeria, Joel

AU - Berntsen, Jarle

AU - Lilover, Madis-Jaak

AU - Thiem, Oyvind

AU - Viboud, Samuel

N1 - This work has been supported by European Community's Seventh Framework Programme through the grant to the budget of the Integrating Activity HYDRALAB IV within the Transnational Access Activities, Contract no. 261520.

PY - 2014/6/1

Y1 - 2014/6/1

N2 - This paper presents details of an experimental study investigating internal flow and near-bed dynamics induced by restricted exchange flows over idealized, scaled obstructions, representing both submerged estuarine sand bars and fjordic sills. The experiments are being performed within a specially constructed rectangular channel sited within the new large diameter Coriolis Rotating Platform II at LEGI Grenoble. Both rigid and erodible obstructions, having idealized trapezoidal cross-section with smoothed edges, will be considered. Experimental measurements will focus on obtaining high-resolution velocity and density profiles in the vicinity of obstruction to observe and quantify the internal mixing and near-bed dynamics generated by exchange flows under both rotating and non-rotating conditions. It is anticipated that this study will result in improved understanding of parametric controls on interfacial mixing and entrainment/detrainment processes for restricted exchange flows in silled fjordic basins, as well as boundary layer processes associated sediment transport and bed morphological changes encountered in semi-enclosed estuaries.

AB - This paper presents details of an experimental study investigating internal flow and near-bed dynamics induced by restricted exchange flows over idealized, scaled obstructions, representing both submerged estuarine sand bars and fjordic sills. The experiments are being performed within a specially constructed rectangular channel sited within the new large diameter Coriolis Rotating Platform II at LEGI Grenoble. Both rigid and erodible obstructions, having idealized trapezoidal cross-section with smoothed edges, will be considered. Experimental measurements will focus on obtaining high-resolution velocity and density profiles in the vicinity of obstruction to observe and quantify the internal mixing and near-bed dynamics generated by exchange flows under both rotating and non-rotating conditions. It is anticipated that this study will result in improved understanding of parametric controls on interfacial mixing and entrainment/detrainment processes for restricted exchange flows in silled fjordic basins, as well as boundary layer processes associated sediment transport and bed morphological changes encountered in semi-enclosed estuaries.

UR - http://hydralab.eu/about-hydralab/history/hydralabiv/proceedings/

M3 - Conference contribution

SP - 1

EP - 5

BT - Proceedings of the HYDRALAB IV Joint User Meeting, Lisbon, July 2014.

PB - Hydralab IV

T2 - Hydralab IV Joint User Meeting

Y2 - 1 June 2014 through 1 June 2014

ER -