How computational fluid dynamics lets us see the wind – part 2

In our first blog on Computational Fluid Dynamics, we introduced CFD as a way of making the invisible visible – letting us see how air, heat, and pollutants move through and around the spaces we design. We promised to come back with real examples of CFD in action. In this follow-up, we show how it is being used in projects to solve practical design challenges.  

CFD has moved well beyond its origins in aeronautics and motorsport. Today it sits alongside more traditional analysis tools across aerospace, automotive, biomedical, chemical, power, and civil and environmental engineering.  

In construction specifically, it has become a valuable design tool, helping teams avoid over-sizing and over-specifying systems, and giving clients greater confidence that a design will perform as intended before a single brick is laid.  

To show what that looks like in practice, here are examples of design challenges CFD has helped us solve across buildings, infrastructure, and urban environments.

Keeping rooftop emissions in check

When generator exhaust needs to disperse safely above a busy urban site, CFD lets us model how those gases will spread and settle. That means we can identify the best location for plant equipment, check compliance against emissions and environmental standards, and avoid unpleasant surprises after handover. 

Tackling thermal bridges and condensation risk

Heat doesn't always escape a building the way the drawings suggest. CFD helps us quantify heat loss through thermal bridges (measures of how heat moves through building elements, often expressed as Ψ- and U-values) and pinpoint where condensation is likely to form within the building envelope informing insulation strategy before it becomes a maintenance problem.  

Designing comfortable, naturally ventilated lobbies

For a naturally ventilated lobby, getting airflow right is the difference between a space that feels fresh and one that feels draughty or stagnant. By modelling prevailing wind conditions, CFD lets designers fine-tune openings and layouts for genuine occupant comfort, rather than relying on guesswork.  

Managing thermal comfort outdoors

The same thinking applies outside. For an open-air beach club exposed to shifting sea breezes and sun, CFD helped refine architecture and building services together – shading, planting, and ventilation – to keep people comfortable without over-relying on energy-hungry cooling.  

Improving pedestrian wind comfort

Tall or unusually shaped buildings can create uncomfortable wind conditions at street level. CFD lets us map wind speeds around a proposed development and use that information to position barriers and landscaping, so pedestrians aren't caught in unwanted downdraughts or wind tunnels – keeping schemes within recognised comfort criteria.  

Protecting metro entrances from wind-driven rain

Semi-enclosed station entrances have to keep commuters dry in bad weather. CFD simulations show how wind-driven rain actually behaves around an entrance, allowing canopies and layouts to be designed for genuine passenger comfort and code compliance.

Modelling fire, smoke, and evacuation

In a family entertainment venue, understanding how smoke and heat will spread in a fire is critical. CFD visualises that spread in real time – temperature, visibility, everything – supporting safer ventilation design and more realistic evacuation planning.  

Optimising data centre airflow

Data centres live or die by their cooling. CFD lets us model airflow and temperature both inside the data hall, informing air distribution and emergency cooling strategy, and outside, where it helps optimise the layout of cooling units to cut energy use and improve resilience.

Across every one of these examples, the value of CFD is the same: it turns an invisible, often unpredictable phenomenon into something we can see, measure, and design around. That means fewer surprises on site, better compliance with regulation, more comfortable buildings for the people who use them, and more sustainable outcomes overall.  

As computing power keeps growing and our modelling techniques keep maturing, we expect CFD's role in shaping the built environment to only grow with it. We'll continue sharing how we're putting it to work, so watch this space for more.