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Article: Large eddy simulation for plunge breaker and sediment suspension

TitleLarge eddy simulation for plunge breaker and sediment suspension
Authors
KeywordsLarge eddy simulation
Marker and cell method
Sediment suspension
Subgrid-scale model
Surf zone
Wave breaking
Issue Date2002
PublisherHaiyang Chubanshe.
Citation
China Ocean Engineering, 2002, v. 16 n. 2, p. 151-164 How to Cite?
AbstractBreaking waves are a powerful agent for generating turbulence that plays an important role in many fluid dynamical processes, particularly in the mixing of materials. Breaking waves can dislodge sediment and throw it into suspension, which will then be carried by wave-induced steady current and tidal flow. In order to investigate sediment suspension by breaking waves, a numerical model based on large-eddy-simulation (LES) is developed. This numerical model can be used to simulate wave breaking and sediment suspension. The model consists of a free-surface model using the surface marker method combined with a two-dimensional model that solves the flow equations. The turbulence and the turbulent diffusion are described by a large-eddy-simulation (LES) method where the large turbulence features are simulated by solving the flow equations, and a subgrid model represents the small-scale turbulence that is not resolved by the flow model , A dynamic eddy viscosity subgrid scale stress model has been used for the present simulation. By applying this model to Stokes' wave breaking problem in the surf zone, we find that the model results agree very well with experimental data. By use of this model to simulation of the breaking process of a periodic wave, it can be found that the model can reproduce the complicated flow phenomena, especially the plunging breaker. It reflects the dynamic structures of roller or vortex in the plunging breaker, and when the wave breaks, many strong vortex structures will be produced in the inner surf zone where the concentration of suspended sediment can thereby become relatively high.
Persistent Identifierhttp://hdl.handle.net/10722/75661
ISSN
2015 Impact Factor: 0.435
2015 SCImago Journal Rankings: 0.422

 

DC FieldValueLanguage
dc.contributor.authorBai, Yen_HK
dc.contributor.authorNg, COen_HK
dc.date.accessioned2010-09-06T07:13:20Z-
dc.date.available2010-09-06T07:13:20Z-
dc.date.issued2002en_HK
dc.identifier.citationChina Ocean Engineering, 2002, v. 16 n. 2, p. 151-164en_HK
dc.identifier.issn0890-5487en_HK
dc.identifier.urihttp://hdl.handle.net/10722/75661-
dc.description.abstractBreaking waves are a powerful agent for generating turbulence that plays an important role in many fluid dynamical processes, particularly in the mixing of materials. Breaking waves can dislodge sediment and throw it into suspension, which will then be carried by wave-induced steady current and tidal flow. In order to investigate sediment suspension by breaking waves, a numerical model based on large-eddy-simulation (LES) is developed. This numerical model can be used to simulate wave breaking and sediment suspension. The model consists of a free-surface model using the surface marker method combined with a two-dimensional model that solves the flow equations. The turbulence and the turbulent diffusion are described by a large-eddy-simulation (LES) method where the large turbulence features are simulated by solving the flow equations, and a subgrid model represents the small-scale turbulence that is not resolved by the flow model , A dynamic eddy viscosity subgrid scale stress model has been used for the present simulation. By applying this model to Stokes' wave breaking problem in the surf zone, we find that the model results agree very well with experimental data. By use of this model to simulation of the breaking process of a periodic wave, it can be found that the model can reproduce the complicated flow phenomena, especially the plunging breaker. It reflects the dynamic structures of roller or vortex in the plunging breaker, and when the wave breaks, many strong vortex structures will be produced in the inner surf zone where the concentration of suspended sediment can thereby become relatively high.en_HK
dc.languageengen_HK
dc.publisherHaiyang Chubanshe.en_HK
dc.relation.ispartofChina Ocean Engineeringen_HK
dc.subjectLarge eddy simulationen_HK
dc.subjectMarker and cell methoden_HK
dc.subjectSediment suspensionen_HK
dc.subjectSubgrid-scale modelen_HK
dc.subjectSurf zoneen_HK
dc.subjectWave breakingen_HK
dc.titleLarge eddy simulation for plunge breaker and sediment suspensionen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0890-5487&volume=16&issue=2&spage=151&epage=164&date=2002&atitle=Large+eddy+simulation+for+plunge+breaker+and+sediment+suspensionen_HK
dc.identifier.emailNg, CO:cong@hku.hken_HK
dc.identifier.authorityNg, CO=rp00224en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.scopuseid_2-s2.0-0036626765en_HK
dc.identifier.hkuros78462en_HK
dc.identifier.volume16en_HK
dc.identifier.issue2en_HK
dc.identifier.spage151en_HK
dc.identifier.epage164en_HK
dc.publisher.placeChinaen_HK
dc.identifier.scopusauthoridBai, Y=7402572067en_HK
dc.identifier.scopusauthoridNg, CO=7401705594en_HK

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