Experimental investigation and CFD modelling of flow, sedimentation, and solids separation in a combined sewer detention tank

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

doi:10.1016/j.compfluid.2008.01.011

Cited by 68 publications

(55 citation statements)

References 15 publications

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“…The mass percentage and the height of deposit in a combined sewer detention tank were successfully estimated by three‐dimensional CFD simulation (Dufresne et al . ).…”

Section: Resultsmentioning

confidence: 97%

Analysis of the Effect of High‐Pressure Homogenization (HPH) on the Settling Velocity of Particles in an Alcoholic Rice Beverage Using Video Recording, Turbidity and Computational Fluid Dynamic Simulation

Moon

Yoon

2015

Journal of Texture Studies

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High‐pressure homogenization (HPH) was applied to an alcoholic rice beverage (ARB). The effects of pressure (48–172 MPa) and the number of passes (1–3) on the fluid properties of the ARB, such as particle size, viscosity, turbidity and settling velocity, were investigated. Mean diameters continuously decreased with increasing homogenization pressure (P) and pass number (PN) until it reached a saturated condition (172 MPa with PN = 2). The viscosity and volume fraction of ARBs proportionally increased with increasing P and PN. The turbidity of HPH‐treated samples had stable characteristic until approximately 40 min. The settling velocities estimated by three different methods, including video recording, computational fluid dynamics simulation and analytic solutions (free and hindered flow). The free and hindered settling velocity of nonhomogenized and HPH‐treated samples were in the range of 1.2 × 10−4 to 1.7 × 10−4 and 0.3 × 10−7 to 4.3 × 10−7 m/s, respectively. Practical Application For alcoholic rice beverages (ARB), the unique translucent milky color differentiates ARB from distilled alcoholic beverage. The translucency is mainly due to the solid particles in the ARB, which could not be completely separated by the coarse filtration. Settling of solid particles caused a phase separation of ARB during storage or even serving in the glass. Our study showed that the high‐pressure homogenization (HPH) dramatically reduced the particle size of the ARB. Consequently, the settling velocity of HPH‐treated samples were significantly lower than that of nonhomogenized (NH) sample. The phase separation of ARB was delayed significantly after HPH.

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“…The mass percentage and the height of deposit in a combined sewer detention tank were successfully estimated by three‐dimensional CFD simulation (Dufresne et al . ).…”

Section: Resultsmentioning

confidence: 97%

Analysis of the Effect of High‐Pressure Homogenization (HPH) on the Settling Velocity of Particles in an Alcoholic Rice Beverage Using Video Recording, Turbidity and Computational Fluid Dynamic Simulation

Moon

Yoon

2015

Journal of Texture Studies

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“…Dufresne et al [17] showed experimentally that particles deposits in the central zone of a sedimentation tank are regularly resuspended but cannot escape because they are jailed by the vortices inside the tank. This phenomenon is confirmed by our numerical experiments, where turbulence generated near the bottoms is holding the particles.…”

Section: Baffle Numbersmentioning

confidence: 98%

Large-eddy simulations of particle sedimentation in a longitudinal sedimentation basin of a water treatment plant. Part 2: The effects of baffles

Al-Sammarraee

Chan

2009

Chemical Engineering Journal

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“…The dynamic of the transport and transformation process occurring in CSO chambers is also seen to be a very important aspect of their design and operation, and is particularly significant for the larger interceptor sewer systems. A number of studies have been conducted on hydraulic performance and/or sediment retention efficiency of CSO chambers by physical laboratory modelling and computational fluid dynamics modelling (Dufresne et al, 2009;Harwood and Saul, 2001;Stovin and Saul, 2000). However, sewer sediment phenomena are not well understood, and as a consequence current sediment transport modelling techniques can provide predictions that are significantly different from observations (Ashley et al, 2004;De Sutter et al, 2003).…”

Section: Introductionmentioning

confidence: 97%

Field study of dynamic behaviour of sediment in combined sewer overflow chambers

Zhou¹,

Chen²,

Shao³

2014

Proceedings of the Institution of Civil Engineers - Water Manag

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Knowledge of the build-up and erosion behaviour of sewer sediment is necessary to facilitate better sediment management strategies. The dynamic behaviours of sediment in specific deep combined sewer overflow (CSO) chambers in Liuzhou, China, were studied through a field investigation in this paper. The results presented show that the chambers suffered from sediment problems of varying severity, and the severity depends on the dry weather flow rate. The sediment layers in chambers reached a certain balance with dry and wet weather flow rate, respectively. It can be classified as irreversible and reversible according to its mobility. The former has a low environmental impact because of its limited mobility and low organic content, and its increasing rate is extremely low year by year, whereas the latter has a highly pollutant content, and is the major cause of sewer odour and CSO pollution. The removal of this layer is seen to be a very important aspect of sewer sediment management.

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Experimental investigation and CFD modelling of flow, sedimentation, and solids separation in a combined sewer detention tank

Cited by 68 publications

References 15 publications

Analysis of the Effect of High‐Pressure Homogenization (HPH) on the Settling Velocity of Particles in an Alcoholic Rice Beverage Using Video Recording, Turbidity and Computational Fluid Dynamic Simulation

Analysis of the Effect of High‐Pressure Homogenization (HPH) on the Settling Velocity of Particles in an Alcoholic Rice Beverage Using Video Recording, Turbidity and Computational Fluid Dynamic Simulation

Large-eddy simulations of particle sedimentation in a longitudinal sedimentation basin of a water treatment plant. Part 2: The effects of baffles

Field study of dynamic behaviour of sediment in combined sewer overflow chambers

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