Back to Search
Start Over
A two-phase numerical model for sediment transport prediction under oscillatory sheet flows
- Source :
-
Coastal Engineering . Dec2008, Vol. 55 Issue 12, p1159-1173. 15p. - Publication Year :
- 2008
-
Abstract
- Abstract: To predict sediment transport under oscillatory sheet flow condition, especially for fine sand, is still a challenging research subject in coastal engineering. This paper describes a newly-developed numerical model based on two-phase theory with the use of a one-equation turbulence closure, and its applications in predicting fine sediment suspension in near-prototype oscillatory sheet flow conditions. Model results were compared with comprehensive laboratory measurements of flow velocity and sediment concentration under both symmetrical and asymmetrical oscillatory sheet flows from a large-scale water tunnel. Good agreements between the model results and measurements were achieved and the results demonstrated that the model is capable of reproducing detailed characteristics of sediment entrainment process in the sheet flow regime. The comparisons also revealed the fact that the concentration peaks at flow reversal is associated with the strong vertical sediment transport flux in the pickup layer, which has been widely observed in many laboratory experiments. The effects of flow reversal events on total sediment transport were also discussed. [Copyright &y& Elsevier]
- Subjects :
- *SEDIMENT transport
*EROSION
*TURBIDITY currents
*SEDIMENTATION & deposition
Subjects
Details
- Language :
- English
- ISSN :
- 03783839
- Volume :
- 55
- Issue :
- 12
- Database :
- Academic Search Index
- Journal :
- Coastal Engineering
- Publication Type :
- Academic Journal
- Accession number :
- 35504620
- Full Text :
- https://doi.org/10.1016/j.coastaleng.2008.05.003