Key Usage of CFD
CFD modelling is a multidisciplinary tool with typical applications for the built environment, including ventilation for occupant comfort and safety, the impact of tall buildings on local microclimates, dispersion of pollutants, aero-acoustic fan design and other issues relating to fluid flow.
Typical examples include effective natural ventilation concepts for green building design, CO fume and smoke exposure analysis in parking ventilation systems, cooling strategies for data centre equipment, smoke control solutions for tunnels, residential and retail atria, bridge pile erosion due to scouring, aero-acoustic redesign of fan ducts to reduce need for silencers and thermal comfort for occupants using HVAC.
The performance of a ventilation system is an important part of occupants’ experience of a building. CFD is commonly used to demonstrate ventilation solutions for complex public buildings such as schools, stadia, museums, train stations, tunnels and offices, demonstrating what comfortable temperatures and air speeds can be maintained, and optimizing the overall strategy where it can.
External airflow modelling assesses the impact of wind around planned developments at pedestrian and terrace levels. It can also be used to determine how external pollutants might spread around a building, and whether there is a risk of expelled flue gases being re-entrained.
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Fire and Smoke Modelling
CFD modelling enables us to understand the development and impact of fires on building designs. We use CFD techniques as a key component of our engineering toolbox to study the performance of a structure for various design scenarios in order to demonstrate that our performance-based solutions are optimized to meet the specific client design aspirations, while satisfying the functional requirements of building regulations.
This type of performance-based analysis is one of the primary routes to unlocking value in our fire engineered design solutions, as opposed to blindly applying building codes. CFD is also the only way to prove that projects with unique architectural features are safe – or at least meet the minimum level of safety implicit in the codes.