Computational Fluid Dynamics - CFD
Flow through a double skin facade
Temperatures and flow direction
Scheme current of warm air
Tropical Islands Resort
For rooms or situations that are especially critical, it is often advisable to calculate the indoor air motion in great detail. For this purpose, the examined area, basically a room or a hall, is split up in many sufficiently small volume elements. Then the local distribution of air speeds, air temperature and air pressure is calculated for each volume element. Depending on the individual task, static (time-independent) or dynamic (time-dependent) air flows are simulated.
Due to the high computing time for the high-resolution spatial calculation of the air motion, it is a rule to analyze only short periods of time. Thus, the CFD simulations (Computational
Fluid Dynamics) complement the long-term thermal calculations of dynamic building simulation.
Typical applications are:
The optimization of comfort in the workplace. Here, the room air temperatures, surface temperatures and air speeds in the workplace are analyzed and compared to the standard specification for work places.
The optimization of a natural ventilation scheme. Here, e.g. the design of the windows and openings in the facade is checked and, if required, optimized to achieve an adequate distribution of air flow.
- The optimization of a mechanical ventilation scheme. Here, e.g. areas of air intake are analyzed regarding comfort and air exchange.
The optimization of the indoor air flow in huge halls. Due to their geometry, these halls often show a significantly different behavior, especially in case of glazed areas. Thus, draughts can occur during winter time as a result of air falling down on the cold inside window panes. In summer, the chilling effect of window ventilation can be reduced considerably due to warm air rising on the warm outside window panes.
The analysis of pollutant and smoke gas dispersal.
The analysis of air flows around a building.