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The Fluid Group

The Fluid Group are specialists in CFD (computational fluid dynamics) for Water, Wastewater, Chemical and Environmental Engineering. Founded in 2005, we provide state-of-the art, 3D flow modelling from first principles.

In the water sector, CFD modelling is used to optimise the design and operation of mixing tanks, contact tanks, reservoirs, pumping stations, flow splits, filter distribution systems, dissolved air flotation tanks, clarifiers, digesters, inlet works and outfalls… all aspects of water and wastewater treatment, storage and distribution.

From single phase to multiphase simulation with water/air and solids, 3D flow modelling can confirm whether a new engineering design will meet the design objectives, or assist with understanding why an existing plant is failing to perform as expected.

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Durleigh WTC (2023)

In 2019, Wessex Water launched a £51 million project to upgrade the Durleigh Water Treatment Centre (WTC) in Somerset, which had reached the end of its operational life. This project was crucial in maintaining the delivery of high-quality drinking water to a population of 44,500 and was part of the company’s long-term water supply strategy […]

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Guildford STW (2023)

Guildford Borough Council (GBC) are progressing with the development of approximately 41 hectares of brownfield land located along the west bank of the River Wey as it runs through central Guildford and north through Slyfield Industrial Estate. Guildford Sewage Treatment Works (STW) lies within this land and requires relocation in order to enable the development […]

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Durleigh WTC (2021)

Wessex Water’s £50m project to upgrade Durleigh Water Treatment Centre (WTC) in Somerset is progressing on programme and within budget, despite some particular challenges posed by the Covid-19 pandemic. Work at the site near Bridgwater started in 2019. It is the largest single-value scheme delivered by Wessex Water’s Engineering & Sustainable Delivery (ESD) department and […]

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Heigham WTW (2021)

Heigham Water Treatment Works (WTW) has supplied clean water to the City of Norwich for more than 100 years. The treatment works supplied an average 42 Ml/d of water into the Norwich Public Water Supply Zone serving a population in excess of 200,000. The £36m scheme was the largest capital investment project within Anglian Water’s […]

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Bray Keleher WTW (2020)

The Bray Keleher Water Treatment Works (WTW) abstracts and treats a maximum of 45 Ml/d of river Thames water and is located on Monkey Island Lane, Bray, between Windsor and Maidenhead. The works is of strategic importance in maintaining supplies to the western region of South East Water (SEW). As part of the final determination […]

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Durleigh WTC (2020)

Durleigh Water Treatment Centre is located approximately 2km west of Bridgwater, Somerset and is Wessex Water’s second largest surface water treatment works serving a population of 44,500. The site was originally designed to treat up to 28.5 Ml/d, with water drawn down from the 959,000m3 Durleigh Impounding Reservoir. Raw water quality has deteriorated in recent […]

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Anchorsholme Long Sea Outfall (2019)

Anchorsholme Park is located on the coast 4 miles north of Blackpool Tower. The long sea outfall (LSO) project is the third of three phases contributing to improving bathing waters on the Fylde Coast. The objective of the overall scheme is to complete the AMP6 obligations on the Fylde Coast of the ‘moving towards three […]

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Bacton Combined Outfall (2019)

The North Norfolk coastline has undergone progressive coastal erosion at around the present rate for the last 5,000 years. The cliffs are made of soft deposits, mainly sand and soft clays, which are very vulnerable to erosion. This long-term coastal change puts pressure on communities, infrastructure and business in the coastal zone. The Bacton Gas […]

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Bray Keleher WTW (2019)

The Bray Keleher Water Treatment Works (WTW) abstracts and treats a maximum of 45 Ml/d of water from the River Thames and is located on Monkey Island Lane, Bray which is part way between Windsor and Maidenhead. The works is of strategic importance in maintaining supplies to the western region of South East Water (SEW). […]

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Morecambe WwTW Catchment Strategy (2019)

United Utilities’ Morecambe sewerage system collects at Schola Green Wastewater Pumping Station (WwPS) located in the west end of the town. From there, flows for treatment are pumped via a 6km long pipeline to Morecambe Wastewater Treatment Works (WwTW), which is situated to the south, near to the village of Middleton. Both sites have sea […]

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Countess Wear Stormwater UV Irradiation Plant (2018)

As of May 2017 there are 137 designated shellfish protected waters in England and of these, 25 are located within the South West Water region. It is estimated that the industry associated with shellfish production areas in the South West is worth £5.35m per annum (figure from EA based upon Shellfish Association of Great Britain […]

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Plymouth Central STW Stormwater UV Irradiation (2018)

The European Union’s (EUs) revised Bathing Water Directive (rBWD) (2006/7/EC) came into force in March 2006 replacing Bathing Water Directive (BWD) (76/1160/EEC). The overall objective of the revised directive is the protection of public health. From November 2015, a new classification system for bathing waters (excellent, good, sufficient or poor) was introduced, with more stringent […]

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South West Water Shellfish Waters NEP AMP6 Programme (2018)

The 2010 Shellfish Waters Directive placed a new obligation on South West Water (SWW) to endeavour to meet the Shellfish Waters Regulations ‘Guideline’ Standard. (Class B). The Shellfish Waters (SFW) programme of work was to meet legislative requirements to protect or improve designated shellfish waters to support shellfish life and growth, contributing to the quality […]

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Whittle Dene WTW (2018)

Whittle Dene Water Treatment Works is Northumbrian Water’s fourth largest treatment works with a deployable output of 118Ml/d, supplying 228,000 properties. Located in Northumberland, 13 miles west of Newcastle, it is a strategically important works to Newcastle, Gateshead, North Tyneside, South Northumberland and Tyne Valley regions. Raw water at the site comes from adjacent reservoirs […]

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Hoplands Farm WTW (2017)

Hoplands Farm WTW is a South East Water treatment plant serving the local towns of Herne Bay and Canterbury. Raw water is pumped via submersible borehole pumps from two chalk boreholes located within the works. The total flow from these boreholes is a maximum of 79 l/s. The raw flows are super-chlorinated and then passed […]

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Horsley WTW (2017)

Northumbrian Water’s Horsley WTW serves around 800,000 people in the Newcastle and Tyneside area. The original works was constructed in 1977 and last extended in 2003. It draws its supply from the nearby River Tyne at Ovingham and the Whittle Dene complex of reservoirs fed from Kielder Water. The existing works has a capacity of […]

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Woodmansterne WTW (2016)

Woodmansterne WTW is being upgraded as part of Sutton and East Surrey Water’s (now SES Water) AMP6 investment to secure water supplies for existing and future customers throughout its supply area. The scope of works is to increase the treatment capacity to a maximum raw water flow of 50Mld. Doosan Enpure has been appointed as […]

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Consultants: Modelling