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 causing local scouring and deposition. Excessive scour undermines the foundations of bridges and other fluvial structures which may ultimately cause their collapse. Reliable methods are needed to model the complex flow features at bridge piers and abutments and hence predict the associated patterns of local scour. Empirical formulae are notoriously inconsistent in their predictions of local scour depth (Johnson, 1995) while physical modelling is time-consuming and therefore expensive.

Grantor dc:publisher.institution

Department of Civil Engineering

Year dc:date.issued

2005

Author dc:creator

• Cunninghame, Margaret

Advisor dc:contributor.advisor

• Armitage, Neil

Language dc:language.iso

eng

Handle dc:identifier.uri

http://hdl.handle.net/11427/5057

OAI identifier oai:identifier

oai:open.uct.ac.za:11427/5057