Assessment of the Effectiveness of Stormwater Treatment Chambers using Computational Fluid Dynamics

Faram, Michael G.; Harwood, R. S.

doi:10.1061/40644(2002)7

Cited by 11 publications

(3 citation statements)

References 3 publications

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“…CFD approaches are particularly useful for identifying relative effects that result from changes in either operating conditions or geometry of a system. Faram and Harwood (2002) applied a CFD model to quantify particle removal efficiencies of four different treatment devices (simple catch basin, gravity sedimentation device, simple vortex separator, and advanced vortex separator) for different particle sizes and different operating flow rates. It was demonstrated that the advanced vortex separator retains the initial solids volume (the originally trapped material) at the bottom rather than re-suspends/washes it out, and has a higher solids removal efficiency than the other three devices.…”

Section: Proceedings Of Asce/ewri World Water and Environmental Resourcmentioning

confidence: 99%

Development of Adjustment and Scaling Factors for Measured Suspended Solids Removal Performance of Stormwater Hydrodynamic Treatment Devices

Guo

2005

Impacts of Global Climate Change

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Suspended solids removal performance of a manufactured stormwater treatment device varies greatly with operating conditions and laboratory or field evaluation techniques. Laboratory testing and field monitoring protocols have been established to evaluate the performance (removal efficiency or effluent concentration) of manufactured stormwater treatment devices and other structural BMPs. However, deviations from the recommended evaluation conditions and techniques are expected and may lead to a significant difference in the measured performances. Range of the parameters/variables specified within the protocol itself may also have a significant effect on the measured performances. Potential effects of six variables are discussed in this paper: TSS vs. SSC methods, operating flow rate, size of the treatment unit, size and density of solid particles in the influent, solids concentration/loading in the influent, and initial volume of solids at bottom of the treatment unit. It is recommended that appropriate adjustment and scaling factors be developed to support certification of performance claims and to appropriately design the stormwater treatment system.

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Section: Proceedings Of Asce/ewri World Water and Environmental Resourcmentioning

confidence: 99%

Development of Adjustment and Scaling Factors for Measured Suspended Solids Removal Performance of Stormwater Hydrodynamic Treatment Devices

Guo

2005

Impacts of Global Climate Change

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“…Vortex separators are used for the sedimentation of gross solids and were the subject of many investigations. (Anoh et al, 2002) (Faram and Harwood, 2002) (Okamoto et al, 2002) The later investigated HydroM.E.S.I. ("Matières en Suspension Intercepteur") particle separator is a lamella based treatment system for the separation of particular pollutants from storm water runoffs before they enter connected waters or infiltration areas.…”

Section: Stormwater Treatment -Gravimetric Settlementmentioning

confidence: 99%

Inflow based investigations on the efficiency of a lamella particle separator for the treatment of stormwater runoffs

Schaffner¹,

Pfeffermann²,

Eckhardt³

et al. 2011

Water Science and Technology

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The present design of stormwater tanks is based on the creation of storage volume to retain stormwater and the prevention or reduction of stormwater overflows. The treatment of stormwater is often improved with mechanical equipment. The general layout rules do usually not include the appropriate choice of design inflow related to the chosen treatment equipment. In the following investigations it was the task to analyze the hydraulic efficiency and the overflow behaviour of a lamella particle separator inside a stormwater tank under different design approaches regarding the chosen design inflow. Therefore six scenarios with different precipitation yield approaches were chosen and applied to a given constant sized catchment to calculate the design inflows. For a given minimum particle size, the necessary number of lamellas were determined for the scenarios and standard stormwater tanks were dimensioned. These stormwater tanks were modelled in the hydrologic model SMUSI to investigate the overflow behaviour of the different tank sizes. The number of overflow events, their duration and maximum flow rates were the results of the modelling. Comparisons to the design inflows were carried out. The treated particles sizes at the overflow events were determined reversible and compared to the original chosen minimum particle sizes.

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“…This has increased the pressure to find solutions to the problems of storm water runoff (Faram and Harwood, 2002), as an integrated numerical approximation of the processes involved are sought (Aragón-Hernández, 2013;Ellis and Marsalek, 1996). Several numerical and physical approaches have been developed, in order to determine the hydraulic efficiency of the catchment structures, understand the variables that intervene in their hydraulic behavior (Carvalho et al, 2019), improve the response to different events (Yazdanfar and Sharma, 2015), and mitigate the effects of floods (Téllez-Álvarez et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Three-dimensional Numerical Evaluation of Hydraulic Efficiency and Discharge Coefficient in Grate Inlets

Zambrano

González

Tequia

2022

EREM

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Floods are one of the causes of ground movement and displacement, and due to rapid urbanization and urban growth may occur more frequently than before. The characteristics of an urban drainage system can define the occurrence and extent of flooding, where catchment elements have a determining role. This document presents the numerical investigation of the hydraulic inlet efficiency and the discharge coefficient of seven types of grate inlets. The FLOW-3D® simulator is used to test the gratings at a full scale, under flow rates of Q = 24, 34.1, 44, 100, 200 and 300 L/s, preserving the configuration of the experimental prototype with longitudinal slopes of 1.0%, 1.5% and 2.0% and a fixed cross slope, for a total of 126 models. Based on the results, hydraulic inlet efficiency curves and discharge coefficients are constructed for each type and a longitudinal slope condition. The results are adjusted with empirical formulations proposed in other investigations, serving to verify the results of physical testing of prototypes.

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Assessment of the Effectiveness of Stormwater Treatment Chambers using Computational Fluid Dynamics

Cited by 11 publications

References 3 publications

Development of Adjustment and Scaling Factors for Measured Suspended Solids Removal Performance of Stormwater Hydrodynamic Treatment Devices

Development of Adjustment and Scaling Factors for Measured Suspended Solids Removal Performance of Stormwater Hydrodynamic Treatment Devices

Inflow based investigations on the efficiency of a lamella particle separator for the treatment of stormwater runoffs

Three-dimensional Numerical Evaluation of Hydraulic Efficiency and Discharge Coefficient in Grate Inlets

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