Coupled flood and sediment transport modelling with adaptive mesh refinement

Wei Huang, Zhixian Cao, Gareth Pender, Qingquan Liu, Paul Carling

Research output: Contribution to journalArticle

16 Citations (Scopus)
47 Downloads (Pure)

Abstract

Coupled flood and sediment transport modelling in large-scale domains has for long been hindered by the high computational cost. Adaptive mesh refinement is one of the viable ways to solving this problem without degrading the accuracy. This goal can be accomplished through mesh adaptation, e.g., mesh coarsening and refining based on the dynamic regime of the flow and sediment transport along with bed evolution. However, previous studies in this regard have been limited to cases either without involving sediment transport or featuring flow-sediment-bed decoupling and the assumption of sediment transport capacity, which are not generally justified. Here, a coupled hydrodynamic and non-capacity sediment transport model is developed on adaptive non-uniform rectangular mesh. The proposed model is validated against experimental tests and numerical results based on the fixed meshes. It is demonstrated that the proposed model can properly capture shock waves, resolve the wetting/drying transition and reproduce morphological evolution. Compared with models based on the fixed meshes, the proposed model features great advantage in computational efficiency and holds promise for wide applications.

Original languageEnglish
Pages (from-to)1425-1438
Number of pages14
JournalScience China Technological Sciences
Volume58
Issue number8
Early online date8 Jul 2015
DOIs
Publication statusPublished - Aug 2015

Keywords

  • adaptive mesh
  • sediment transport
  • shallow water flow

ASJC Scopus subject areas

  • Engineering(all)
  • Materials Science(all)

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