CFD Modeling of Solid Separation in Three Combined Sewer Overflow Chambers

Dufresne, Matthieu; Vázquez, J.; Terfous, Abdelali; Ghenaim, Abdellah; Poulet, Jean-Bernard

doi:10.1061/(asce)ee.1943-7870.0000017

Cited by 15 publications

(8 citation statements)

References 24 publications

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“…However, their solution to problems with complex geometries and boundary conditions required the development of efficient numerical solution techniques and the ability to implement these techniques on computers. The development of both numerical techniques and digital machines with increased computational power allowed for the wide application of CFD methods to many areas of fluid dynamics during the last few decades, including water and wastewater engineering [20,17,33,24,14,22,35,41,40,12,49,42,16,38,26,30] . Recently, CFD methods were also applied to study flows inside anaerobic digesters.…”

Section: Traditional Approaches Versus Cfd In the Study Of Anaerobic mentioning

confidence: 99%

Application of CFD methods to an anaerobic digester: The case of Ontinyent WWTP, Valencia, Spain

Jiménez

Escudero-González

Martínez

et al. 2015

Journal of Water Process Engineering

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Section: Traditional Approaches Versus Cfd In the Study Of Anaerobic mentioning

confidence: 99%

Application of CFD methods to an anaerobic digester: The case of Ontinyent WWTP, Valencia, Spain

Jiménez

Escudero-González

Martínez

et al. 2015

Journal of Water Process Engineering

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“…It was shown that the transition between symmetric and asymmetric flow patterns is controlled by the shape factor S=L/B 0.6 /b 0.4 . The experimentally observed flow patterns were reproduced by numerical simulations either based on the Reynolds-Averaged Navier-Stokes equations (Dufresne et al, 2009) or using more operational models based on the shallow water equations (Dewals et al, 2008;Liu et al, 2010;Dufresne et al, 2011). In particular, Dewals et al (2008) presented numerical simulations based on a finite volume model including a two-lengthscale depth-averaged k-ɛ turbulence closure.…”

Section: Introductionmentioning

confidence: 98%

“…The geometric configuration of rectangular shallow reservoirs may also be regarded as a useful idealization of more complex situations, such as river-floodplain systems (Chu et al, 2004) or applications in different fields of chemical, civil and environmental engineering (Goula et al, 2008;Lee et al, 2013;Ng and Chau, 2014). Dufresne et al (2009;2010a) showed that the pattern of sediment deposits highly depends on the complex flow fields developing in such reservoirs, as highlighted by recent experimental research (Camnasio et al, 2011;Camnasio et al, 2013;Dewals et al, 2008;Dufresne et al, 2012). Besides a symmetric flow with a central jet (patterns S0 and S1), several asymmetric flow patterns were identified, despite of the hydraulic and geometric symmetry of the experimental setups ( Fig.…”

Section: Introductionmentioning

confidence: 99%

Prediction of Mean and Turbulent Kinetic Energy In Rectangular Shallow Reservoirs

Camnasio

Erpicum

Archambeau

et al. 2014

Engineering Applications of Computational Fluid Mechanics

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Shallow rectangular reservoirs are common structures in urban hydraulics and river engineering. Despite their simple geometries, complex symmetric and asymmetric flow fields develop in such reservoirs, depending on their expansion ratio and length-to-width ratio. The original contribution of this study is the analysis of the kinetic energy content of the mean flow, based on UVP velocity measurements carried out throughout the reservoir in eleven different geometric configurations. A new relationship is derived between the specific mean kinetic energy and the reservoir shape factor. For most considered geometric configurations, leading to four different flow patterns, the experimentally observed flow fields and mean kinetic energy contents are successfully reproduced by an operational numerical model based on the depth-averaged flow equations and a two-length-scale k- turbulence closure. The analysis also highlights the better performance of this depth-averaged k- model compared to an algebraic turbulence model. Finally, the turbulent kinetic energy in the reservoir is derived from the experimental measurements and the corresponding numerical predictions based on the k- model agree satisfactorily in the main jet but not in the recirculation zones.

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“…Typical examples are the study of the flow and of the transport and mixing of contaminants and sediments within those systems as well as floodplain inundation modeling (Olsen 2001, Bates et al 2005, Czernuszenko and Rowinski 2005. Also, CFD methods are sometimes applied in wastewater engineering (Karama et al 1999, Hague et al 2001, Peplinski and Ducoste 2002, Liu et al 2004, Gualtieri 2006, Khan et al 2006, Rauen et al 2008, Stamou, 2008, Dufresne et al 2009, Wols et al 2010. Finally, in more recent times, CFD methods have been applied to the analysis of hyporheic flows, e.g.…”

Section: Introductionmentioning

confidence: 99%

Ten iterative steps for model development and evaluation applied to Computational Fluid Dynamics for Environmental Fluid Mechanics

Blocken

Gualtieri

2012

Environmental Modelling & Software

233

101

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Computational Fluid Dynamics (CFD) is increasingly used to study a wide variety of complex Environmental Fluid Mechanics (EFM) processes, such as water flow and turbulent mixing of contaminants in rivers and estuaries and wind flow and air pollution dispersion in urban areas. However, the accuracy and reliability of CFD modeling and the correct use of CFD results can easily be compromised. In 2006, Jakeman et al. set out ten iterative steps of good disciplined model practice to develop purposeful, credible models from data and a priori knowledge, in consort with end-users, with every stage open to critical review and revision (Jakeman et al., 2006). This paper discusses the application of the ten-steps approach to CFD for EFM in three parts. In the first part, the existing best practice guidelines for CFD applications in this area are reviewed and positioned in the ten-steps framework. The second and third part present a retrospective analysis of two case studies in the light of the ten-steps approach: (1) contaminant dispersion due to transverse turbulent mixing in a shallow water flow and (2) coupled urban wind flow and indoor natural ventilation of the Amsterdam ArenA football stadium. It is shown that the existing best practice guidelines for CFD mainly focus on the last steps in the ten-steps framework. The reasons for this focus are outlined and the value of the additional - preceding - steps is discussed. The retrospective analysis of the case studies indicates that the ten-steps approach is very well applicable to CFD for EFM and that it provides a comprehensive framework that encompasses\ud and extends the existing best practice guidelines

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CFD Modeling of Solid Separation in Three Combined Sewer Overflow Chambers

Cited by 15 publications

References 24 publications

Application of CFD methods to an anaerobic digester: The case of Ontinyent WWTP, Valencia, Spain

Application of CFD methods to an anaerobic digester: The case of Ontinyent WWTP, Valencia, Spain

Prediction of Mean and Turbulent Kinetic Energy In Rectangular Shallow Reservoirs

Ten iterative steps for model development and evaluation applied to Computational Fluid Dynamics for Environmental Fluid Mechanics

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