Numerical simulation of temperature distribution and turbulent flow in the radiant floor heating room

This paper investigates turbulent air convection coupled with thermal radiation in the radiant floor heating room by numerical simulation. The k-ε two-equation turbulent model is used in the numerical simulation of in-room air flow field and temperature distribution. According to the analysis of temperature distribution of air in the room's vertical direction and the wall surfaces temperature and heat flux distribution characteristics, the result show that except the boundary layer part along the wall, air temperature of the room are more or less uniform with 1°C difference, and this is the reason why radiant floor heating can cause to a good comfort. The numerical simulation results show also that the radiant heat transfer is very important in the floor heating room. It is 50-60 percent of total thermal flux.