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Showing 1 to 9 of 9 for “"Local scour"”.
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Local scour at bridge piers
Local scour at cylindrical bridge piers in both uniform and non-uniform cohesionless sediments was investigated experimentally. The aim of the study was to improve understanding of local scour around bridge piers with sediment transport. Three empirical functions which relate the equilibrium depth …
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Modelling local scour around bridge piers using TELEMAC
Scour at bridge crossings is a major cause of bridge failure. There are several different types of scour such as general scour, constriction scour and local scour. One of the most serious types is local scour which occurs as a result of vortex formation around bridge piers and abutments (Hoffmans & …
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Physical modeling of local scour around complex bridge piers
Local scour around bridge foundations has been recognized as one of the main causes of bridge failures. The objective of this study is to investigate the relationships among field, laboratory, and numerical data for the purpose of improving scour prediction methods for complex bridge piers. In this …
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The Effect of Wall Jet Flow on Local Scour Hole
… measurements and measurements of the evolving scour hole shape were made. Detailed descriptions of the turbulent flow field over a fixed rough bed and for scour holes at equilibrium were obtained for a range of initial jet conditions. Fully turbulent, multiphase flow was modelled using the …
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Numerical modelling of local scour in rivers using fluent 6.2
Scour and deposition are natural processes which take place in a river as the stream profile adjusts to changing flow rates, sediment loads and other environmental conditions. Man-made obstacles to the stream flow such as bridge piers and abutments and other hydraulic structures alter flow patterns …
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Burial of Short Cylinders Induced by Local Scour and Bedform Migration Under Waves Plus Currents
… The burial of a short cylinder was determined by local scour around the cylinder and by a more global process associated with the presence of ripples and sandwaves. The role of bedform evolution on the burial of short cylinders was studied. For this purpose, a series of detailed measurements of …
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Introducing, Examining and Optimising Flow Diversion Structure as an Innovative Countermeasure against Local Scour around Bridge Piers
Previous investigations have indicated that local scour around bridge piers and abutments is a common cause of waterway bridge failures with around 60% of bridge collapses due to this phenomenon. To reduce local scour, a new flow-altering device referred to as a flow diversion structure (FDS) has …
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Using the movability number to model local clear-water scour in rivers
Local scour is associated with a considerable number of bridge failures worldwide. It occurs at bridge piers and abutments as a result of interactions between complex flow features and the channel bed. The number of factors involved in the interactions makes it difficult to predict. A lot of …
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Numerical, field and laboratory studies of three-dimensional flow structures at river channel confluences
… those where bed discordance is due to local scour in the centre of the confluence, one or more cells have been identified. Thus, it is clear that both junction angle and bed discordance are important controls, but not how they interact or their relative effect under different …