Three-Dimensional numerical model with free water surface and mesh deformation for local sediment scour

Xiaofeng Liu, Marcelo H. García

Research output: Contribution to journalArticle

100 Citations (Scopus)

Abstract

A numerical model for local sediment scour with free surface and automatic mesh deformation is constructed and numerical results are compared with experimental results. For the turbulence closure, the two equation k-ε model is used. Two interfaces (water and air, water and sediment) in the domain are captured with different approaches. The free surface of the flow is simulated with the volume of fluid (VOF) scheme, which is an Eulerian approach. A new method for the VOF scheme is proposed to reduce the computational time while retaining relative accuracy. The behavior of the water-sediment interface (bed) is captured with a moving-mesh method, which is a Lagrangian approach. The flow field is coupled with sediment transport (both bed load and suspended load) using a quasi-steady approach. Good results have been obtained using the current model. The flow field is similar to the one observed in experiments. Scour patterns are similar to the experimental data as well. Large computational times are needed for morphological simulation and parallel computation is used to accelerate this process. The results obtained from the model are promising.

Original languageEnglish (US)
Pages (from-to)203-217
Number of pages15
JournalJournal of Waterway, Port, Coastal and Ocean Engineering
Volume134
Issue number4
DOIs
StatePublished - Jul 1 2008

Fingerprint

Scour
scour
Numerical models
Sediments
surface water
Flow fields
sediment
flow field
Water
Fluids
Sediment transport
suspended load
fluid
Turbulence
sediment-water interface
bedload
sediment transport
turbulence
Air
water

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Water Science and Technology
  • Ocean Engineering

Cite this

@article{06a62ac70e344ad686031c80712e05ce,
title = "Three-Dimensional numerical model with free water surface and mesh deformation for local sediment scour",
abstract = "A numerical model for local sediment scour with free surface and automatic mesh deformation is constructed and numerical results are compared with experimental results. For the turbulence closure, the two equation k-ε model is used. Two interfaces (water and air, water and sediment) in the domain are captured with different approaches. The free surface of the flow is simulated with the volume of fluid (VOF) scheme, which is an Eulerian approach. A new method for the VOF scheme is proposed to reduce the computational time while retaining relative accuracy. The behavior of the water-sediment interface (bed) is captured with a moving-mesh method, which is a Lagrangian approach. The flow field is coupled with sediment transport (both bed load and suspended load) using a quasi-steady approach. Good results have been obtained using the current model. The flow field is similar to the one observed in experiments. Scour patterns are similar to the experimental data as well. Large computational times are needed for morphological simulation and parallel computation is used to accelerate this process. The results obtained from the model are promising.",
author = "Xiaofeng Liu and Garc{\'i}a, {Marcelo H.}",
year = "2008",
month = "7",
day = "1",
doi = "10.1061/(ASCE)0733-950X(2008)134:4(203)",
language = "English (US)",
volume = "134",
pages = "203--217",
journal = "Journal of Waterway, Port, Coastal and Ocean Engineering",
issn = "0733-950X",
publisher = "American Society of Civil Engineers (ASCE)",
number = "4",

}

Three-Dimensional numerical model with free water surface and mesh deformation for local sediment scour. / Liu, Xiaofeng; García, Marcelo H.

In: Journal of Waterway, Port, Coastal and Ocean Engineering, Vol. 134, No. 4, 01.07.2008, p. 203-217.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Three-Dimensional numerical model with free water surface and mesh deformation for local sediment scour

AU - Liu, Xiaofeng

AU - García, Marcelo H.

PY - 2008/7/1

Y1 - 2008/7/1

N2 - A numerical model for local sediment scour with free surface and automatic mesh deformation is constructed and numerical results are compared with experimental results. For the turbulence closure, the two equation k-ε model is used. Two interfaces (water and air, water and sediment) in the domain are captured with different approaches. The free surface of the flow is simulated with the volume of fluid (VOF) scheme, which is an Eulerian approach. A new method for the VOF scheme is proposed to reduce the computational time while retaining relative accuracy. The behavior of the water-sediment interface (bed) is captured with a moving-mesh method, which is a Lagrangian approach. The flow field is coupled with sediment transport (both bed load and suspended load) using a quasi-steady approach. Good results have been obtained using the current model. The flow field is similar to the one observed in experiments. Scour patterns are similar to the experimental data as well. Large computational times are needed for morphological simulation and parallel computation is used to accelerate this process. The results obtained from the model are promising.

AB - A numerical model for local sediment scour with free surface and automatic mesh deformation is constructed and numerical results are compared with experimental results. For the turbulence closure, the two equation k-ε model is used. Two interfaces (water and air, water and sediment) in the domain are captured with different approaches. The free surface of the flow is simulated with the volume of fluid (VOF) scheme, which is an Eulerian approach. A new method for the VOF scheme is proposed to reduce the computational time while retaining relative accuracy. The behavior of the water-sediment interface (bed) is captured with a moving-mesh method, which is a Lagrangian approach. The flow field is coupled with sediment transport (both bed load and suspended load) using a quasi-steady approach. Good results have been obtained using the current model. The flow field is similar to the one observed in experiments. Scour patterns are similar to the experimental data as well. Large computational times are needed for morphological simulation and parallel computation is used to accelerate this process. The results obtained from the model are promising.

UR - http://www.scopus.com/inward/record.url?scp=45749098893&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=45749098893&partnerID=8YFLogxK

U2 - 10.1061/(ASCE)0733-950X(2008)134:4(203)

DO - 10.1061/(ASCE)0733-950X(2008)134:4(203)

M3 - Article

AN - SCOPUS:45749098893

VL - 134

SP - 203

EP - 217

JO - Journal of Waterway, Port, Coastal and Ocean Engineering

JF - Journal of Waterway, Port, Coastal and Ocean Engineering

SN - 0733-950X

IS - 4

ER -