Simulation and Experimental Validation of Chaotic Behavior of Airflow in a Ventilated Room

Chaos may lead to instability, extreme sensitivity and performance reduction in dynamic systems. Therefore it is unwanted in many cases. Due to these undesirable characteristics of chaos in practical systems, it is important to recognize such a chaotic behavior. In this paper the chaotic behavior of the airflow in case of an ordinary ventilated room is researched. Computational chaotic behavior is already observed in the simulations by changing the supply air temperature from 22 oC into 21.9 oC.However, it could be the case that, despite all efforts, the chaotic behavior is a numeral artifact. Therefore laboratory experiments using a scale model were performed. It is concluded that the computational model of the experimental scale model has to be improved to simulate the experimental results more accurately.Furthermore, the presented method seems promising in detecting chaotic behaviour.