Simulation of two-dimensional density currents developing on a slope

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Dense underflows developing on a slope two-dimensionally are simulated numerically. The k-ε model is used for the turbulence closure. The boundary-layer approximation renders the governing equations to be parabolic partial differential equations, which are easier to solve numerically than elliptic equations. Evolution of vertical structures of dense underflows are computed along the streamwise direction. Excellent similarity collapse of computed vertical structures are obtained. Computed profiles of velocity and concentration are compared with measured data, resulting good agreement. A parameter representing stratification level in the k-ε model is calibrated, and the use of this calibrated value in the vertical structure model yields nearly identical results with the integral model.

Original languageEnglish
Title of host publicationComputational methods in water resources - Volume 2 - Computational methods,surface water systems and hydrology
EditorsL.R. Bentley, J.F. Sykes, C.A. Brebbia, W.G. Gray, G.F. Pinder, L.R. Bentley, J.F. Sykes, C.A. Brebbia, W.G. Gray, G.F. Pinder
PublisherA.A.Balkema
Pages881-887
Number of pages7
ISBN (Print)9058091252
Publication statusPublished - 2000 Jan 1
EventComputational Methods in Water Resources - Calgary, Canada
Duration: 2000 Jun 252000 Jun 29

Other

OtherComputational Methods in Water Resources
CountryCanada
CityCalgary
Period00/6/2500/6/29

Fingerprint

density current
Current density
simulation
Model structures
Partial differential equations
Boundary layers
Turbulence
stratification
boundary layer
turbulence

All Science Journal Classification (ASJC) codes

  • Earth and Planetary Sciences(all)
  • Engineering(all)
  • Environmental Science(all)

Cite this

Choi, S. U., & Chung, J. (2000). Simulation of two-dimensional density currents developing on a slope. In L. R. Bentley, J. F. Sykes, C. A. Brebbia, W. G. Gray, G. F. Pinder, L. R. Bentley, J. F. Sykes, C. A. Brebbia, W. G. Gray, ... G. F. Pinder (Eds.), Computational methods in water resources - Volume 2 - Computational methods,surface water systems and hydrology (pp. 881-887). A.A.Balkema.
Choi, S. U. ; Chung, J. / Simulation of two-dimensional density currents developing on a slope. Computational methods in water resources - Volume 2 - Computational methods,surface water systems and hydrology. editor / L.R. Bentley ; J.F. Sykes ; C.A. Brebbia ; W.G. Gray ; G.F. Pinder ; L.R. Bentley ; J.F. Sykes ; C.A. Brebbia ; W.G. Gray ; G.F. Pinder. A.A.Balkema, 2000. pp. 881-887
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abstract = "Dense underflows developing on a slope two-dimensionally are simulated numerically. The k-ε model is used for the turbulence closure. The boundary-layer approximation renders the governing equations to be parabolic partial differential equations, which are easier to solve numerically than elliptic equations. Evolution of vertical structures of dense underflows are computed along the streamwise direction. Excellent similarity collapse of computed vertical structures are obtained. Computed profiles of velocity and concentration are compared with measured data, resulting good agreement. A parameter representing stratification level in the k-ε model is calibrated, and the use of this calibrated value in the vertical structure model yields nearly identical results with the integral model.",
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Choi, SU & Chung, J 2000, Simulation of two-dimensional density currents developing on a slope. in LR Bentley, JF Sykes, CA Brebbia, WG Gray, GF Pinder, LR Bentley, JF Sykes, CA Brebbia, WG Gray & GF Pinder (eds), Computational methods in water resources - Volume 2 - Computational methods,surface water systems and hydrology. A.A.Balkema, pp. 881-887, Computational Methods in Water Resources, Calgary, Canada, 00/6/25.

Simulation of two-dimensional density currents developing on a slope. / Choi, S. U.; Chung, J.

Computational methods in water resources - Volume 2 - Computational methods,surface water systems and hydrology. ed. / L.R. Bentley; J.F. Sykes; C.A. Brebbia; W.G. Gray; G.F. Pinder; L.R. Bentley; J.F. Sykes; C.A. Brebbia; W.G. Gray; G.F. Pinder. A.A.Balkema, 2000. p. 881-887.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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N2 - Dense underflows developing on a slope two-dimensionally are simulated numerically. The k-ε model is used for the turbulence closure. The boundary-layer approximation renders the governing equations to be parabolic partial differential equations, which are easier to solve numerically than elliptic equations. Evolution of vertical structures of dense underflows are computed along the streamwise direction. Excellent similarity collapse of computed vertical structures are obtained. Computed profiles of velocity and concentration are compared with measured data, resulting good agreement. A parameter representing stratification level in the k-ε model is calibrated, and the use of this calibrated value in the vertical structure model yields nearly identical results with the integral model.

AB - Dense underflows developing on a slope two-dimensionally are simulated numerically. The k-ε model is used for the turbulence closure. The boundary-layer approximation renders the governing equations to be parabolic partial differential equations, which are easier to solve numerically than elliptic equations. Evolution of vertical structures of dense underflows are computed along the streamwise direction. Excellent similarity collapse of computed vertical structures are obtained. Computed profiles of velocity and concentration are compared with measured data, resulting good agreement. A parameter representing stratification level in the k-ε model is calibrated, and the use of this calibrated value in the vertical structure model yields nearly identical results with the integral model.

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Choi SU, Chung J. Simulation of two-dimensional density currents developing on a slope. In Bentley LR, Sykes JF, Brebbia CA, Gray WG, Pinder GF, Bentley LR, Sykes JF, Brebbia CA, Gray WG, Pinder GF, editors, Computational methods in water resources - Volume 2 - Computational methods,surface water systems and hydrology. A.A.Balkema. 2000. p. 881-887