Assessment of 3D-RANS models for the simulation of topographically forced shallow flows

[img]
Preview
PDF
Language: English
962Kb
Title:Assessment of 3D-RANS models for the simulation of topographically forced shallow flows
Creators:
Akbar Safarzadeh, Akbar; safarzadeh at uma dot ac dot ir; Department of Civil Engineering, University of Mohaghegh Ardabili, Daneshgah Street, 56199-11367, Ardabil, Iran.
Brevis, Wernher; Structural and Civil Engineering Department, University of Sheffield, Sir Frederick Mappin Building, Mappin Street, Sheffield, S1 3JD, UK.
Journal or Publication Title:
Journal of Hydrology and Hydromechanics, 64, 1, pp. 83-90
Uncontrolled Keywords:shallow flow, RANS, SPIV, side obstacle, shear layer, turbulence

Abstract

In this work the performance of Reynolds Averaged Navier-Stokes (RANS) simulations to predict the flow structure developed by the presence of a sidewall obstacle in a uniform open-channel shallow flow is discussed. The tested geometry was selected due to its important role in several fluvial applications, such as the control of riverbank erosion and the creation of improved ecological conditions in river restoration applications. The results are compared against experimental laboratory velocity fields obtained after Large Scale Particle Image Velocimetry (LSPIV) measurements. It is shown that the length of reattachment of the separated shear layer generated by the obstacle is well predicted by a Reynolds Stress Model, while classical two-equation models show important limitations. All the performed RANS simulations are unable to properly predict the formation of a secondary gyre region, which develops immediately downstream the obstacle.

Official URL: http://147.213.145.2/vc/vc1.asp

Title:Assessment of 3D-RANS models for the simulation of topographically forced shallow flows
Translated title:Assessment of 3D-RANS models for the simulation of topographically forced shallow flows
Creators:
Akbar Safarzadeh, Akbar; safarzadeh at uma dot ac dot ir; Department of Civil Engineering, University of Mohaghegh Ardabili, Daneshgah Street, 56199-11367, Ardabil, Iran.
Brevis, Wernher; Structural and Civil Engineering Department, University of Sheffield, Sir Frederick Mappin Building, Mappin Street, Sheffield, S1 3JD, UK.
Uncontrolled Keywords:shallow flow, RANS, SPIV, side obstacle, shear layer, turbulence
Subjects:T Technology > TA Engineering (General). Civil engineering (General)
Divisions:Mathematics, Physics and Earth Sciences > Institute of Hydrodynamics > Journal of Hydrology and Hydromechanics
Journal or Publication Title:Journal of Hydrology and Hydromechanics
Volume:64
Number:1
Page Range:pp. 83-90
ISSN:0042-790X
Publisher:Institute of Hydrology of the Slovak Academy of Sciences and the Institute of Hydrodynamics of the Academy of Sciences of the Czech Republic
Related URLs:
URLURL Type
http://avi.lib.cas.cz/node/55Publisher
ID Code:8635
Item Type:Article
Deposited On:16 Feb 2016 11:48
Last Modified:16 Feb 2016 10:48

Citation

Akbar Safarzadeh, Akbar; Brevis, Wernher (2016) Assessment of 3D-RANS models for the simulation of topographically forced shallow flows. Journal of Hydrology and Hydromechanics, 64 (1). pp. 83-90. ISSN 0042-790X

Repository Staff Only: item control page