Numerical Investigation of Flow and Sediment Transport around a Circular Bridge Pier

A computation module for sediment transport in open channels was developed and incorporated into the commercial code FLOW-3D. In the module, the bed-load transport is simulated with a non-equilibrium model. Effects of bed slop and material sliding are also taken into account. The bed deformation is obtained from an overall mass-balance equation for sediment transport. This paper presents the results of a model application to compute the temporal variation of flow and scour around a circular bridge pier. The experimental investigation has been carried out by Unger and Hager (2006). The predictions are compared with measurements of flow and bed deformation, for which the results show generally good agreement.

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