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

Magda Carr, Alan Cuthbertson, Janek Laanearu, Joel Sommeria, Jarle Berntsen, Madis-Jaak Lilover, Oyvind Thiem, Samuel Viboud

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

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.
Original languageEnglish
Title of host publicationProceedings of the HYDRALAB IV Joint User Meeting, Lisbon, July 2014.
PublisherHydralab IV
Pages1-5
Number of pages5
Publication statusPublished - 1 Jun 2014
EventHydralab IV Joint User Meeting - Lisbon, Portugal
Duration: 1 Jun 20141 Jun 2014
http://hydralab.eu/about-hydralab/history/HydralabIV/

Conference

ConferenceHydralab IV Joint User Meeting
CountryPortugal
CityLisbon
Period1/06/141/06/14
Internet address

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experimental study
sill
entrainment
sediment transport
boundary layer
cross section
estuary
sand
basin
experiment

Cite this

Carr, M., Cuthbertson, A., Laanearu, J., Sommeria, J., Berntsen, J., Lilover, M-J., ... Viboud, S. (2014). Experimental study of internal mixing and near-bed dynamics induced by restricted stratified exchange flows. In Proceedings of the HYDRALAB IV Joint User Meeting, Lisbon, July 2014. (pp. 1-5). Hydralab IV.
Carr, Magda ; Cuthbertson, Alan ; Laanearu, Janek ; Sommeria, Joel ; Berntsen, Jarle ; Lilover, Madis-Jaak ; Thiem, Oyvind ; Viboud, Samuel. / Experimental study of internal mixing and near-bed dynamics induced by restricted stratified exchange flows. Proceedings of the HYDRALAB IV Joint User Meeting, Lisbon, July 2014.. Hydralab IV, 2014. pp. 1-5
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title = "Experimental study of internal mixing and near-bed dynamics induced by restricted stratified exchange flows",
abstract = "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.",
author = "Magda Carr and Alan Cuthbertson and Janek Laanearu and Joel Sommeria and Jarle Berntsen and Madis-Jaak Lilover and Oyvind Thiem and Samuel Viboud",
note = "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.",
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Carr, M, Cuthbertson, A, Laanearu, J, Sommeria, J, Berntsen, J, Lilover, M-J, Thiem, O & Viboud, S 2014, Experimental study of internal mixing and near-bed dynamics induced by restricted stratified exchange flows. in Proceedings of the HYDRALAB IV Joint User Meeting, Lisbon, July 2014.. Hydralab IV, pp. 1-5, Hydralab IV Joint User Meeting, Lisbon, Portugal, 1/06/14.

Experimental study of internal mixing and near-bed dynamics induced by restricted stratified exchange flows. / Carr, Magda; Cuthbertson, Alan; Laanearu, Janek; Sommeria, Joel; Berntsen, Jarle; Lilover, Madis-Jaak; Thiem, Oyvind; Viboud, Samuel.

Proceedings of the HYDRALAB IV Joint User Meeting, Lisbon, July 2014.. Hydralab IV, 2014. p. 1-5.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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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.

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Carr M, Cuthbertson A, Laanearu J, Sommeria J, Berntsen J, Lilover M-J et al. Experimental study of internal mixing and near-bed dynamics induced by restricted stratified exchange flows. In Proceedings of the HYDRALAB IV Joint User Meeting, Lisbon, July 2014.. Hydralab IV. 2014. p. 1-5