Airflow Simulation

CFD (Computational Fluid Dynamics)

Airflow analysis is used to verify detailed passive building design. It may be used in a wide range of applications, ranging from assessing internal comfort for passive design, to analysing external pressures and airflow patterns around buildings (for pedestrian comfort). Results are presented in a clear graphical manner, using flow visualisation and animation. Airflow analysis is performed in-house using state-of-the-art Computational Fluid Dynamics (CFD) techniques. Originally developed for the aeronautical industry as an alternative to wind tunnel testing, this technology is now applied when assessing building performance.

The attached videos, starting from the top of the page give a good range of examples showcasing various uses of CFD for Airflow Simulation.

TCD Printing House Square (PHS) – Rifle Range
PHS includes facilities for Dublin University Rifle Club – one of TCD’s oldest societies.
The new facility includes a dedicated Rifle Range for Target Shooting, for which Displacement Ventilation with a laminar horizontal crossway flow was proposed.
In the absence of exemplar projects of this nature being available, IN2 Engineering undertook extensive Airflow Simulations to verify the ventilation performance. This included assessing alternative rates of fire to ensure lead contaminant risk to Shooters was mitigated.

Block 10A North Wall Quay – Car Park Ventilation
Airflow Simulations were undertaken using CFD to verify the extent of natural ventilation free area provided for a Lower Ground Car Park area in lieu of Part F guidelines.
Parked cars starting in an office evening scenario were simulated, with the associated carbon monoxide from exhausts modelled. The simulations determined that sufficient free area of openings and associated natural ventilation could be expected for the car park to successfully dissipate contaminants.

Event Space – Side Wall Ventilation
Airflow Simulations can be utilised to validate ventilation design and ensure occupant comfort conditions. In this simulation, supply air is provided via a side wall linear grille, with contours illustrating temperature and how comfort was ensured.

EMEA Office – FCU Supply
The tendency in modern offices for exposed services installations can result in unforeseen airflow characteristics, allowing that most ventilation grilles and diffusers are designed to be installed flush with a finished ceiling plane.
The offices are designed in peak summer conditions to be provided with cooling as part of an overall “Mixed Mode” environmental strategy (primarily utilising natural ventilation). IN2 ensured correct airflow configuration and associated mitigation of draft risk to occupants for cooling conditions through these airflow simulations. In this simulation, it can be seen how the supply diffuser has been designed as a linear diffuser, located immediately adjacent to the Primary structural beams. By locating the diffusers in these locations, the design not only ensures a visually consistent linear appearance within the space but utilises the underside of the structural beam to ensure correct air discharge without airdropping and associated draught risk.


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