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CFD & Precision Engineering

Computational fluid dynamics for hydraulic optimisation, bubble distribution analysis, and velocity profiling. Eliminate dead zones, short-circuiting, and uneven flow distribution before steel is cut. Precision engineering that transforms theoretical design into verified performance.

See the Flow Before You Build

CFD simulation eliminates hydraulic uncertainty from equipment design

The hydraulic performance of a treatment vessel is invisible until it is built, and expensive to correct once installed. CFD simulation changes this. We model the flow through your DAF unit, clarifier, or reactor before fabrication, identifying dead zones, short-circuiting paths, velocity gradients, and turbulence that would compromise performance. The result is equipment that works as designed on day one, without costly post-installation modifications.

What CFD Reveals

Computational fluid dynamics solves the Navier-Stokes equations across the geometry of your treatment vessel, producing a three-dimensional map of velocities, pressures, turbulence intensity, and residence time distribution. This reveals patterns that no rule-of-thumb design can predict.

Dead zones where solids accumulate and biological activity is compromised
Short-circuiting paths that reduce effective retention time
Velocity gradients that shear floc and reduce settling efficiency
Bubble distribution uniformity in DAF systems
Mixing intensity and chemical reaction uniformity

What We Optimise

CFD findings are translated into design modifications that improve hydraulic performance. Every adjustment is quantified, so you know exactly how much better the optimised design will perform compared to the baseline.

Inlet and outlet geometry to prevent jetting and recirculation
Plate spacing and angle for optimal settling velocity capture
Baffle placement to eliminate short-circuiting
Air diffuser distribution for uniform bubble saturation
Sludge hopper geometry for efficient collection and removal

CFD Applications in Wastewater Equipment

Precision engineering for every type of treatment vessel

DAF Hydraulics

Bubble distribution, rise velocity profiles, and surface skimming efficiency are modelled to optimise air dissolution rate, contact zone residence time, and separation zone hydraulics for maximum solids removal.

Lamella Clarifier Flow

Inlet distribution, plate laminar flow development, and sludge hopper collection are simulated to ensure uniform hydraulic loading across all plates and prevent turbulence that would resettle solids.

Biological Reactor Mixing

Aerator placement, mixer impeller selection, and tank geometry are optimised to ensure oxygen transfer efficiency, prevent dead zones, and maintain homogeneous biomass distribution across the reactor volume.

Chemical Mixing Tanks

Rapid mix and flocculation chamber hydraulics are modelled to verify velocity gradient compliance, ensure chemical dispersion uniformity, and prevent excessive shear that would break fragile floc.

Filtration Vessel Distribution

Underdrain and header lateral design is simulated to verify uniform flow distribution across the filter bed, preventing channelling and ensuring consistent backwash cleaning.

Equalisation Tank Flow

Variable flow regimes and fill/draw cycles are modelled to ensure complete mixing, prevent stratification, and maintain consistent effluent quality to downstream processes regardless of inlet variation.

Process Fundamentals & Design

This treatment stage is engineered to achieve specific contaminant removal targets while providing stable, predictable performance across variable inlet conditions. Design parameters are calculated from wastewater characterisation data, regulatory requirements, and site-specific constraints including footprint, energy availability, and operator capability.

Process Optimisation

Design validated by CFD modelling and pilot testing to confirm performance guarantees.

Mechanical Reliability

Equipment selected for 20-year design life with minimal wearing parts and easy access.

Chemical Efficiency

Automated dosing and feedback control minimise reagent consumption and sludge production.

Compliance Assurance

Online monitoring and data logging demonstrate continuous consent compliance.

Design Parameters

Design Flow10 – 5,000 m³/h (application specific)
Inlet VariabilityDesigned for 1:3 peak-to-average flow ratio
Removal Efficiency85 – 99% depending on target contaminant
Hydraulic RetentionCalculated from kinetic constants and safety factors
Power Consumption0.5 – 5.0 kWh/100 m³ (process dependent)
Chemical DoseAuto-controlled based on online analysers
Sludge Production0.2 – 1.5 kg DS/kg contaminant removed
MaterialsSS304, SS316L, or carbon steel with coating

Integration with Treatment Train

No treatment stage operates in isolation. This process is designed to receive conditioned influent from upstream stages and deliver effluent quality suitable for downstream processes. Hydraulic and organic loading rates are balanced across the complete treatment train to prevent bottlenecking and ensure overall plant efficiency. Our engineers model the complete flowsheet to optimise Capital expenditure and Operating expenditure across the plant lifecycle.

Upstream Protection

Screening, equalisation, and pre-treatment protect this stage from damage and overload.

Downstream Conditioning

Effluent quality ensures downstream biology, filtration, or disinfection performs optimally.

Recycle Streams

Reject streams, filtrate, and centrate are routed back to appropriate upstream points.

Related Pages & Equipment

Equipment Catalogue

Browse our full range of water treatment equipment and systems.

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DAF Systems

Dissolved air flotation for solids and oil separation.

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Lamella Clarifiers

High-rate settling for primary and secondary clarification.

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Biological Treatment

Activated sludge, MBBR, and SBR systems for organic removal.

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Sludge Dewatering

Belt press, centrifuge, and screw press dewatering.

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Chemical Dosing

Automated coagulant, flocculant, and pH correction systems.

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Pilot Testing

Validate process performance with on-site pilot trials.

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Speak to Our Engineers

Request a consultation or quotation for your project.

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CFD Thermal Simulation Services

Conjugate heat transfer modelling for equipment and processes where temperature control is critical to performance, efficiency, and safety.

Heat Exchanger Optimisation

Plate, shell-and-tube, and spiral heat exchanger thermal performance with fouling prediction and energy efficiency analysis.

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Cooling Tower Performance

Evaporative cooling simulation with spray droplet tracking, fill pack optimisation, and fan power reduction.

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Thermal Mixing Analysis

Transient temperature uniformity in tanks, reactors, and vessels. Eliminate stratification and hot spots.

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Evaporation & Drying

Phase-change thermal modelling for evaporators, crystallisers, and sludge dryers with energy optimisation.

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Bioreactor Temperature

Heat generation and removal in biological reactors. Maintain optimal mesophilic conditions for maximum COD removal.

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Power Plant Cooling

Condenser, cooling tower, and heat recovery steam generator thermal analysis for maximum cycle efficiency.

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Optimise Your Hydraulics Before Fabrication

CFD simulation transforms equipment design from educated guesswork into verified engineering. Speak with our simulation engineers to model your treatment vessel and eliminate hydraulic uncertainty.

Industries We Serve

Our expertise spans multiple industries with sector-specific water treatment solutions.