Improvement performance of Al-Wathba settling tank by a computational fluid dynamics model

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Title:Improvement performance of Al-Wathba settling tank by a computational fluid dynamics model
Creators:
Kriš, Jozef; kris at svf dot stuba dot sk; Slovak University of Technology, Faculty of Civil Engineering, Department of Sanitary and Environmental Engineering, Radlinského 11, 813 68 Bratislava, Slovakia
Hadi, Ghawi A.; ghawi2000 at yahoo dot com; Al-Qadissiyia University, College of Engineering Department of Civil Engineering, Iraq
Journal or Publication Title:
Journal of Hydrology and Hydromechanics, 58, 3, pp. 201-210
Uncontrolled Keywords:Computational Fluid Dynnmics, Water Treatment, Clarifiers, Baffle, Water Quality

Abstract

An investigation has been carried out using the FLUENT Computational Fluid Dynamics (CFD) software, which uses the finite-volume method to determine whether it is feasible to improve the capacity and quality of the clarifier at the Al-Wathba Water Treatment Works (Iraq) by some relatively inexpensive means. Simulations were carried out with two dimensional, radially symmetric models, representing the existing configuration as well as a number of proposed modifications involving baffles and additional clarified water off-takes. A convection-diffusion equation, which is extended to incorporate the sedimentation of sludge flocs in the field of gravity, governs the mass transfer in the clarifier. The standard k-ε turbulence model is used to compute the turbulent motion, and our CFD model accounts for buoyancy flow. The sludge settling velocity was measured as a function of the concentration, and we have used the double-exponential settling velocity function to describe its dependence on the concentration. The CFD model is validated using measured concentration profiles. The results were evaluated on the basis of the simulated profiles of vertical up-flow velocity in the body of the clarifier.

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

Title:Improvement performance of Al-Wathba settling tank by a computational fluid dynamics model
Translated title:Zlepšenie činnosti sedimentačnej nádrže Al-Wathba pomocou CFD modelu - počítačovej simulácie prúdenia kvapalín
Creators:
Kriš, Jozef; kris at svf dot stuba dot sk; Slovak University of Technology, Faculty of Civil Engineering, Department of Sanitary and Environmental Engineering, Radlinského 11, 813 68 Bratislava, Slovakia
Hadi, Ghawi A.; ghawi2000 at yahoo dot com; Al-Qadissiyia University, College of Engineering Department of Civil Engineering, Iraq
Uncontrolled Keywords:Computational Fluid Dynnmics, Water Treatment, Clarifiers, Baffle, Water Quality
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:58
Number:3
Page Range:pp. 201-210
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:6218
Item Type:Article
Deposited On:12 Oct 2010 17:12
Last Modified:12 Oct 2010 15:12

Citation

Kriš, Jozef; Hadi, Ghawi A. (2010) Improvement performance of Al-Wathba settling tank by a computational fluid dynamics model. Journal of Hydrology and Hydromechanics, 58 (3). pp. 201-210. ISSN 0042-790X

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