Yes / For the abutment bed scour to reach its equilibrium state, a long flow time is needed. Hence, the
employment of usual strategy of simulating such scouring event using the 3D numerical model is
very time consuming and less practical. In order to develop an applicable model to consider
temporally long abutment scouring process, this study modifies the common approach of 2D
shallow water equations (SWEs) model to account for the sediment transport and turbulence, and
provides a realistic approach to simulate the long scouring process to reach the full scour
equilibrium. Due to the high demand of the 2D SWEs numerical scheme performance to simulate
the abutment bed scouring, a recently proposed surface gradient upwind method (SGUM) was
also used to improve the simulation of the numerical source terms. The abutment scour
experiments of this study were conducted using the facility of Hydraulics Laboratory at Nanyang
Technological University, Singapore to compare with the presented 2D SGUM-SWEs model.
Fifteen experiments were conducted over a total period of 3059.7 hours experimental time (over
4.2 months). The comparison shows that the 2D SGUM-SWEs model gives good representation
to the experimental results with the practical advantage.
| Identifer | oai:union.ndltd.org:BRADFORD/oai:bradscholars.brad.ac.uk:10454/8325 |
| Date | 01 May 2013 |
| Creators | Pu, Jaan H., Lim, S.Y. |
| Source Sets | Bradford Scholars |
| Language | English |
| Detected Language | English |
| Type | Article, Accepted Manuscript |
| Rights | © 2014 Springer Netherlands. Full-text reproduced in accordance with the publisher’s self-archiving policy. |
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