Numerical simulation of velocity and temperature fields for an air conditioned room with underfloor air supply terminal units

Develops a simulation model, experimentally validates its applicability under isothermal air supply. Numerically simulates the velocity and temperature fields in the room with nonisothermal air supply under different supply air rates. The results show that air outlet velocity mainly influences the velocity field in the area near the outlet and has insignificant influence on that of the whole room, and the velocity field is uniform which is below 0.25 m/s except the area near the outlet; that the effect of air outlet velocity on the temperature field is significant and the vertical temperature gradient is large, but the horizontal temperature difference is small. To ensure the availability and energy efficiency of underfloor air distribution, the outlet velocity should be strictly controlled to make the jet near the working area while the air flow rate is enough.