A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Insights from Depth-Averaged Numerical Simulation of Flow at Bridge Abutments in Compound Channels
Two-dimensional, depth-averaged flow models are used to study the distribution of flow around spill-through abutments situation on floodplains in compound channels and rectangular channels. The study leads to useful insights regarding distributions of flow velocity, unit discharge, and boundary shear stress at spill-through abutments. It also presents insights from extensive assessment of uncertainty associated with the use of depth-averaged modeling of flow at abutments. Of substantial use for design determination of abutment scour at bridge waterways is estimation of the magnitude of peak values of flow velocity, boundary shear stress, and unit discharge in the region where scour develops. The study, by showing how abutment flow fields adjust in response to variations, yields important trends regarding the magnitude of amplification factors for depth-averaged velocity, unit discharge, bed shear stress, and distance to peak unit discharge. The study comprises a much broader range of abutment lengths, channel shapes, and floodplain dimensions. It yields a relationship for estimating the optimum mesh size for use with depth-average models.
Insights from Depth-Averaged Numerical Simulation of Flow at Bridge Abutments in Compound Channels
Two-dimensional, depth-averaged flow models are used to study the distribution of flow around spill-through abutments situation on floodplains in compound channels and rectangular channels. The study leads to useful insights regarding distributions of flow velocity, unit discharge, and boundary shear stress at spill-through abutments. It also presents insights from extensive assessment of uncertainty associated with the use of depth-averaged modeling of flow at abutments. Of substantial use for design determination of abutment scour at bridge waterways is estimation of the magnitude of peak values of flow velocity, boundary shear stress, and unit discharge in the region where scour develops. The study, by showing how abutment flow fields adjust in response to variations, yields important trends regarding the magnitude of amplification factors for depth-averaged velocity, unit discharge, bed shear stress, and distance to peak unit discharge. The study comprises a much broader range of abutment lengths, channel shapes, and floodplain dimensions. It yields a relationship for estimating the optimum mesh size for use with depth-average models.
Insights from Depth-Averaged Numerical Simulation of Flow at Bridge Abutments in Compound Channels
R. Morales (author) / R. Ettema (author)
2011
123 pages
Report
No indication
English
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