Water Mixing and Renewal in Circular Cross-Section Storage Tanks as Influenced by Configuration and Operational Conditions

Pinheiro, Alexandre; Monteiro, Laura; Carneiro, Joana; Almeida, M. C.; Covas, Dídia

doi:10.1061/(asce)hy.1943-7900.0001955

Cited by 8 publications

(9 citation statements)

References 30 publications

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“…IMiST project is organized in seven main tanks: T1 -Field survey and database assembly; T2 -Lab scale studies; T3 -Numerical modelling; T4 -Full scale studies; T5 -Mixing improvement measures; T6 -Modelling of mixing in hydraulic simulators; T7 -Recommendations design, operation and rehabilitation. Results have given rise to several publications [46][47][48][49][50][51]. Relevant results attained in tasks T2-T6 are briefly presented herein.…”

Section: Introductionmentioning

confidence: 80%

“…The resulting mesh is characterized by 1.4 million mainly hexahedral cells with 1.5 million points of calculus. Less refined meshes settings in the wall were analysed however, the flow pattern obtained by the CFD did not follow the one observed by recorder images of the movement of the dye tracer solution in the laboratory [52]. For the flow pattern analysis, a multiphase solver has been used.…”

Section: Cfd Modellingmentioning

confidence: 99%

See 1 more Smart Citation

Modelling of water mixing and renewal time in storage tanks

Covas,

Pinheiro,

Vaz

et al. 2022

Proceedings - 2nd International Join Conference on Water Distribution System Analysis (WDSA)& Computing and Control in the

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The current paper aims at presenting the main developments and achievement attained in research project IMiST – Improving mixing in Storage Tanks for safer water supply, funded by Fundação para a Ciencia e Tecnologia, carried out between 2018 and 2022. This project aimed at a better understanding of flow dynamics inside water supply systems’ storage tanks to find practicable solutions to improve the design and the rehabilitation and to support operation of the existing tanks. The project comprised the development of an extensive experimental programme of small-scale tests, full-scale testing in a real storage tank and advanced numerical modelling. Small-scale tests were carried out in the Laboratory of Hydraulics and Water Resources of Instituto Superior Técnico, Portugal, for different tank’s configurations and operating conditions. Two different cross-section tanks (circular and rectangular) were tested with and without interior structures (baffles) and with the inlet and outlet pipes at different locations. Three sets of experimental tests were carried out using different instrumentation to collect complementary data, namely traditional tracer tests, dye tracer tests and velocity field measurements by Particle Image Velocimetry (PIV). A methodology for assessing mixing conditions in full-scale storage tanks was developed and tested in a real tank with a rectangular cross-section and 3500 m3 capacity with inner baffles. Advanced numerical modelling using Computational Fluid Dynamics was carried out for the submerged and plunging get in a circular tank for betted understanding the velocity fields and the flow patterns. This complementary experimental and numerical modelling have allowed drawing conclusions concerning improving mixing measures, by readjusting the tank configuration (e.g., location, number and diameter of inlet/outlet pipes, jet inflow, fluctuating stored water volume and geometry) and changing operating conditions (e.g., extreme tank levels, pump scheduling). New knowledge on water storage tank hydrodynamics has been created and guidelines for upgrading tank design, rehabilitation and operation were prepared with design criteria for new tanks and measures for the improvement/rehabilitation of existing tanks in supply systems, that will be briefly summarised herein.

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Section: Introductionmentioning

confidence: 80%

Section: Cfd Modellingmentioning

confidence: 99%

Modelling of water mixing and renewal time in storage tanks

Covas,

Pinheiro,

Vaz

et al. 2022

Proceedings - 2nd International Join Conference on Water Distribution System Analysis (WDSA)& Computing and Control in the

View full text Add to dashboard Cite

show abstract

“…WQ deterioration in tanks is a common issue discussed in literature. Studies on storage tanks can be classified into three areas: (1) monitoring and sampling [19][20][21], (2) physical-scale modelling [22][23][24], and (3) mathematical modelling [25,26]. This paper focuses on mathematical modelling (3) and its validation with real measurements (1).…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Evolution of Water Quality in Tanks according to the Connections and Operation Mode. Application to the most Suitable Design

Hervás,

Martínez-Alzamora,

Conejos

2024

Preprint

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The analysis and simulation of water quality in distribution networks is a complex issue of great concern today. The analysis of the evolution of water age, as a simple indicator of water quality in the network, is of great interest in both design and operation phases. Understanding the factors that have the strongest influence on water quality is key to developing adequate strategies aimed at preserving it. This paper firstly analyses the factors with biggest influence in the tanks water age, to support the selection of the most appropriate configuration from the point of view of water quality during design phases. Then, the main considerations when modelling tanks following the different mixing models considered in Epanet have been presented. Also, a real tank behaviour has been characterised through field measurements and Epanet simulations in order to determine the best fitted mixing model.

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“…WQ deterioration in tanks is a common issue discussed in the literature. Studies on storage tanks can be classified into three areas: (1) monitoring and sampling [19][20][21],…”

Section: Introductionmentioning

confidence: 99%

“…(2) physical-scale modelling [22][23][24], and (3) mathematical modelling [25,26]. This paper focuses on mathematical modelling (3) and its validation with real measurements (1).…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Evolution of Water Quality in Tanks According to the Connections and Operation Mode: Application to the Most Suitable Design

Hervás,

Martínez-Alzamora,

Conejos

2024

Water

View full text Add to dashboard Cite

The analysis and simulation of water quality in distribution networks is a complex issue of great concern today. The analysis of the evolution of water age as a simple indicator of water quality in the network is of great interest in both the design and operation phases. Understanding the factors that have the strongest influence on water quality is key to developing adequate strategies aimed at preserving it. This paper first analyses the factors with the biggest influence on the tank’s water age to support the selection of the most appropriate configuration from the point of view of water quality during design phases. Then, the main considerations when modelling tanks following the different mixing models considered in Epanet are presented. Also, real tank behaviour is characterised through field measurements and Epanet simulations in order to determine the best-fitting mixing model.

show abstract

Water Mixing and Renewal in Circular Cross-Section Storage Tanks as Influenced by Configuration and Operational Conditions

Cited by 8 publications

References 30 publications

Modelling of water mixing and renewal time in storage tanks

Modelling of water mixing and renewal time in storage tanks

Analysis of the Evolution of Water Quality in Tanks according to the Connections and Operation Mode. Application to the most Suitable Design

Analysis of the Evolution of Water Quality in Tanks According to the Connections and Operation Mode: Application to the Most Suitable Design

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