Abstract
In present work, the FADS is described using the porous media model, which is called the direct description (DD) method. The simulation is conducted using the commercial software Fluent with modified k - ε model. Simulation results show that, when air is generated by FADS with orifices, the part of supply airflow is penetrated from the porous fibre at a lower speed, and the left is jetted out through orifices at a higher speed, and then, both airflow merge together at a certain distance. The indoor air velocity is lower and air temperature in the upper zone is lower than that in the lower zone, yet the vertical temperature difference is less than 3 K. Furthermore, the FADS’ length has great impact on the distribution of indoor air velocity and temperature. The proper distance should be determined in order to obtain more uniformly distribution of indoor air velocity and temperature.
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