Buoyancy-driven natural ventilation in buildings : experimental and numerical studies

The study of buoyancy-driven natural ventilation in buildings requires windless conditions. It is difficult to conduct on-site measurements since the nature has few windless moments so a full-scale test room placed in a large laboratory environment can create artificially such conditions but it is an expensive method. CFD methods using two different models (RANS and LES) provide an alternative approach to study natural ventilation in buildings.
This paper shows the results of experimental measurements in a naturally ventilated test room, as well as results of RANS and LES modelling and compares the advantages and drawbacks of the methods.