| VORTEX FLOW FIELD IN A SCOUR HOLE AROUND ABUTMENTS |
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| 作者姓名： | Abdul Karim BARBHUIYA Subhasish DEY |
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| 作者单位： | Lecturer，Department of Applied Mechanics，National Institute of Technology，Silchar 788010 Assam，India，Associate Professor，Department of Civil Engineering，Indian Institute of Technology，Kharagpur 721302，West Bengal，India. |
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| 摘 要： | The three-dimensional flow field in a scour hole around different abutments under a clear water regime was experimentally measured in a laboratory flume, using the Acoustic Doppler Velocimeter (ADV). Three types of abutments used in the experiments were vertical-wall (rectangular section), 45° wing-wall (45° polygonal section) and semicircular. The three-dimensional time-averaged velocity components were detected at different vertical planes for vertical-wall abutment and azimuthal planes for wing-wall and semicircular abutments. The velocity components were also measured at different horizontal planes. In the upstream, presentations of flow field through vector plots at vertical / azimuthal and horizontal planes show the existence of a primary vortex associated with the downflow inside the scour hole. On the other hand, in the downstream, the flow field shows a reversed flow near the abutments having a subsequent recovery with a passage of flow as a part of the main flow. The data presented in this p
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VORTEX FLOW FIELD IN A SCOUR HOLE AROUND ABUTMENTS |
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| Abdul Karim BARBHUIYA,Subhasish DEY.VORTEX FLOW FIELD IN A SCOUR HOLE AROUND ABUTMENTS[J].International Journal of Sediment Research,2003,18(4). |
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| Authors: | Abdul Karim BARBHUIYA Subhasish DEY |
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| Abstract: | The three-dimensional flow field in a scour hole around different abutments under a clear water regime was experimentally measured in a laboratory flume, using the Acoustic Doppler Velocimeter (ADV). Three types of abutments used in the experiments were vertical-wall (rectangular section), 45° wing-wall (45° polygonal section) and semicircular. The threedimensional time-averaged velocity components were detected at different vertical planes for vertical-wall abutment and azimuthal planes for wing-wall and semicircular abutments. The velocity components were also measured at different horizontal planes. In the upstream, presentations of flow field through vector plots at vertical / azimuthal and horizontal planes show the existence of a primary vortex associated with the downflow inside the scour hole. On the other hand, in the downstream, the flow field shows a reversed flow near the abutments having a subsequent recovery with a passage of flow as a part of the main flow. The data presented in this paper would be useful to the researchers for the development and verification of mathematical models of flow field in a scour hole at bridge abutments. |
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| Keywords: | Abutments Three-dimensional flow Vortex flow Open channel flow Scour Sediment transport Fluvial hydraulics |
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