We provide a holistic solution for all aspects of external built environment, broadly, acoustics, wind climate and wind loads. CFD simulations allow for designing a structure efficiently at an early stage of the project and to demonstrate that a design meets the requirements prior to construction .
Wind comfort is assessed using CFD simulations to quickly and accurately provide insight into the local wind climate before or during the design of a new development. We can asses the pedestrian comfort on criteria such as the Lawson or the Dutch Standard NEN 8100. Areas which are unsafe or have wind nuisance can be identified and dealt with by using trees, canopies, balcony railings etc. to overcome the nuisance.
Calculating wind loads is an essential part for the design of structures and buildings. In most cases this load is calculated using the standard EN 1991-1-4, which is particularly suitable for standard building shapes. For non-standard building shapes CFD simulations can be used to calculate the wind load on a structure. Additionally, the standard assumes that wind always approaches structures perpendicular, with a wind speed depending on location and height. In practice, this is not always the case and possibly can lead to both over- and underestimation of the wind load. The expected wind load can be calculated in more detail by means of CFD simulations. This adds an extra level of certainty, but can also save costs without compromising safety. These types of simulation are applied to high-rise buildings, ships/off-shore, structures mounted on buildings such as advertising letters, railings, etc.
Noise pollution in an urban environment is an increasing concern to the authorities. There is an increasing demand from the authorities for demonstrating that the acoustic measures applied on balconies/windows/loggias actually reduce noise levels. We can not only simulate urban noise and effect of the measures but also indoor acoustics using a combination of Ray-tracing and FEM. We often calculate sound levels for indoor acoustics, urban noise, traffic/industry noise.
Air pollutant dispersion is of importance due to increasing urbanization. Using CFD simulations, the spread of pollutants can be calculated and the expected levels of concentration can be determined near e.g. residential areas. This insight is important for creating a healthy living environment.
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Noise reduction on high rise buildings located in areas prone to noise nuisance is a challenge in urban locations. Regulations have tightened and local authorities impose stricter noise control regulation on newly developed buildings. The cost incurred with such noise reduction measures has also become a commercially important factor. Acoustic calculations with FEM (Finite Element Method) on building façades and related structures can help optimize the cost incurred for such measures and present an acceptable approach to the authorities. An example case is presented below.
Wind loads on moored ships are an important factor in determining the loads on the mooring lines. Present methods of calculating wind loads largely depend on the wind coefficients obtained from past experimental data for scaled models of various ships in a wind tunnel. However, this leads to erroneous calculations in the built environment such as a port surrounded by buildings. The present methodology uses CFD simulations to accurately calculate forces on the ship and thereafter providing corrected wind coefficients that can be widely used to further calculate the forces on moored lines.