Available on ORBi since
25 February 2011
Article (Scientific journals)
Modelling sediment transport over partially non-erodible bottoms
Rulot, François  ; Dewals, Benjamin  ; Erpicum, Sébastien  et al.
2012 • In International Journal for Numerical Methods in Fluids, 70 (2), p. 186-199
Peer Reviewed verified by ORBi
 

Files


Full Text
fld2684.pdf
Publisher postprint (1.17 MB)

All documents in ORBi are protected by a user license.

Send to



Details



Keywords :
non-erodible bottom; computational method; sediment transport
Abstract :
[en] In depth- and cross section-averaged morphodynamic models, based on explicit time integration, it may happen that the computed bed level becomes lower than the top level of a non-erodible layer (e.g. concrete, bedrock or armoured layer). This is a standard pitfall which has been addressed in different ways. In this paper, we present an original approach for avoiding computation of non-physical bed levels, using an iterative procedure to correct the outward sediment fluxes. The procedure is shown to be computationally efficient while it achieves a high accuracy in terms of mass conservation. We compare our original approach with the existing Struiksma’s method and with a reformulation of the problem in terms of mathematical optimization of a linear or non-linear objective function under linear constraints. The new procedure has been incorporated into an existing finite volume morphodynamic model. It has been validated with several 1D benchmarks leading to configurations with sediment transport over non-erodible bottom. The computation time has been verified not to increase by more than 15% compared to runs without non-erodible bottom.
Research center :
Aquapôle - ULiège
Disciplines :
Civil engineering
Author, co-author :
Rulot, François ;  Université de Liège - ULiège > Département Argenco : Secteur MS2F > Hydrodynamique appl. et constructions hydrauliques (HACH)
Dewals, Benjamin  ;  Université de Liège - ULiège > Département Argenco : Secteur MS2F > Hydrodynamique appl. et constructions hydrauliques (HACH)
Erpicum, Sébastien  ;  Université de Liège - ULiège > Services généraux (Faculté des sciences appliquées) > Scientifiques attachés au Doyen (Sc.appliquées)
Archambeau, Pierre ;  Université de Liège - ULiège > Département Argenco : Secteur MS2F > Hydrodynamique appl. et constructions hydrauliques (HACH)
Pirotton, Michel ;  Université de Liège - ULiège > Département Argenco : Secteur MS2F > Hydrodynamique appl. et constructions hydrauliques (HACH)
Language :
English
Title :
Modelling sediment transport over partially non-erodible bottoms
Publication date :
2012
Journal title :
International Journal for Numerical Methods in Fluids
ISSN :
0271-2091
eISSN :
1097-0363
Publisher :
Wiley, New York, United States - New York
Volume :
70
Issue :
2
Pages :
186-199
Peer reviewed :
Peer Reviewed verified by ORBi

Statistics


Number of views
216 (41 by ULiège)
Number of downloads
249 (10 by ULiège)

Scopus citations®
 
11
Scopus citations®
without self-citations
10
OpenCitations
 
9

Bibliography


Similar publications



Contact ORBi