• CFD Consultancy Sump Pump Station CFD Simulation Example
    Sump Pump Station Analysis

Understand and quantify plant performance with CFD

Computational fluid dynamics (CFD) is rapidly becoming an essential decision-support tool in the water and wastewater treatment sector. When applied correctly, CFD provides detailed insight into almost all unit processes, helping operators, designers and utilities understand hydraulic behaviour, diagnose performance issues and derisk capital upgrades.

Navier Flow Consultants provide specialist CFD capability to support the design and optimisation of water and wastewater treatment facilities. Our work covers a wide range of processes including flow-splitting structures, inlet works, pumping stations, settlement tanks, chlorine contact tanks (CCTs), UV treatment systems, biological reactors and anaerobic digestion. This enables a quantitative and visual understanding of plant performance across hydraulic, physical, chemical and biological processes.

The physics within these processes are complex, ranging from non-Newtonian sludge rheology to multiphase aeration flow and biokinetic reaction modelling. Navier has the experience and expertise to ensure that our CFD consultancy services deliver timely and actionable results that directly support operational decisions and regulatory compliance. We have also presented our CFD work on contact tank optimisation to UK water utilities at the WRc Innovation Forum, reflecting the sector’s growing interest in advanced hydraulic modelling.

Regulatory drivers increasingly require tighter control of hydrodynamics, disinfectant contact time and effluent quality. By aligning modelling outputs with expectations from the Environment Agency and the Drinking Water Inspectorate, CFD provides a robust evidence base that supports design reviews, investment planning and operational performance assessments.

Key outputs:

  • Ultraviolet (UV) treatment performance and dosing effectiveness
  • Pumping station and inlet works optimisation
  • Hydrodynamic assessment of Primary Settlement Tanks
  • Flow balancing and equalisation for improved downstream treatment
  • Effluent quality enhancement in Settlement Tanks
  • Disinfectant concentration management and hydraulic performance of Chlorine Contact Tanks (CCT)