Prediction of the bedforms generated by density currents based on fluvial phase diagrams
ABSTRACT Density currents, whose movement takes place by the density difference between the flow and the ambient fluid around it, can interact with the substract generating bedforms similar to the fluvial environments. However, there are no specific bedform phase diagrams capable to predict this typ...
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| Format: | Article |
| Language: | English |
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Associação Brasileira de Recursos Hídricos
2017-09-01
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| Series: | Revista Brasileira de Recursos Hídricos |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2318-03312017000100243&tlng=en |
| _version_ | 1818719952773840896 |
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| author | Débora Karine Koller Ana Luiza de Oliveira Borges Eduardo Puhl Rafael Manica |
| author_facet | Débora Karine Koller Ana Luiza de Oliveira Borges Eduardo Puhl Rafael Manica |
| author_sort | Débora Karine Koller |
| collection | DOAJ |
| description | ABSTRACT Density currents, whose movement takes place by the density difference between the flow and the ambient fluid around it, can interact with the substract generating bedforms similar to the fluvial environments. However, there are no specific bedform phase diagrams capable to predict this type of phenomenon. This study aims to compare the prediction of fluvial bedforms phase diagram with those generated by experimental saline currents. Bedforms were generated in two-dimensional tilting plexiglass flume submerged in a larger tank filled with water with three different mobile beds and varied values of discharge and salt concentration. It was observed three types of bedform (lower plane bed, ripples and dunes), which, with the concomitant calculation of hydrodynamic parameters (mean velocity, energy and mobility) allowed the use of the phase diagram. It was observed that the fluvial phase diagrams did not present good predictions for bedforms generated by density currents. This fact is associated to the hydrodynamics differences (velocity and concentration profiles) and the limitation of the dimensional parameters in the extrapolation of results. Therefore, it is indicated the need to draw up a proper phase diagram to density currents. |
| first_indexed | 2024-12-17T20:15:07Z |
| format | Article |
| id | doaj.art-f58fbb1fcc4c44768ca34d1c174e36f7 |
| institution | Directory Open Access Journal |
| issn | 2318-0331 |
| language | English |
| last_indexed | 2024-12-17T20:15:07Z |
| publishDate | 2017-09-01 |
| publisher | Associação Brasileira de Recursos Hídricos |
| record_format | Article |
| series | Revista Brasileira de Recursos Hídricos |
| spelling | doaj.art-f58fbb1fcc4c44768ca34d1c174e36f72022-12-21T21:34:09ZengAssociação Brasileira de Recursos HídricosRevista Brasileira de Recursos Hídricos2318-03312017-09-012210.1590/2318-0331.0217160021Prediction of the bedforms generated by density currents based on fluvial phase diagramsDébora Karine KollerAna Luiza de Oliveira BorgesEduardo PuhlRafael ManicaABSTRACT Density currents, whose movement takes place by the density difference between the flow and the ambient fluid around it, can interact with the substract generating bedforms similar to the fluvial environments. However, there are no specific bedform phase diagrams capable to predict this type of phenomenon. This study aims to compare the prediction of fluvial bedforms phase diagram with those generated by experimental saline currents. Bedforms were generated in two-dimensional tilting plexiglass flume submerged in a larger tank filled with water with three different mobile beds and varied values of discharge and salt concentration. It was observed three types of bedform (lower plane bed, ripples and dunes), which, with the concomitant calculation of hydrodynamic parameters (mean velocity, energy and mobility) allowed the use of the phase diagram. It was observed that the fluvial phase diagrams did not present good predictions for bedforms generated by density currents. This fact is associated to the hydrodynamics differences (velocity and concentration profiles) and the limitation of the dimensional parameters in the extrapolation of results. Therefore, it is indicated the need to draw up a proper phase diagram to density currents.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2318-03312017000100243&tlng=enDensity currentBedformsPhysical modelingMobile bedBedform phase diagram |
| spellingShingle | Débora Karine Koller Ana Luiza de Oliveira Borges Eduardo Puhl Rafael Manica Prediction of the bedforms generated by density currents based on fluvial phase diagrams Revista Brasileira de Recursos Hídricos Density current Bedforms Physical modeling Mobile bed Bedform phase diagram |
| title | Prediction of the bedforms generated by density currents based on fluvial phase diagrams |
| title_full | Prediction of the bedforms generated by density currents based on fluvial phase diagrams |
| title_fullStr | Prediction of the bedforms generated by density currents based on fluvial phase diagrams |
| title_full_unstemmed | Prediction of the bedforms generated by density currents based on fluvial phase diagrams |
| title_short | Prediction of the bedforms generated by density currents based on fluvial phase diagrams |
| title_sort | prediction of the bedforms generated by density currents based on fluvial phase diagrams |
| topic | Density current Bedforms Physical modeling Mobile bed Bedform phase diagram |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2318-03312017000100243&tlng=en |
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