The effect of indoor heating system location on particle deposition and convection heat transfer: DMRT-LBM

Abstract

In this paper Double Multi Relaxation Time Lattice Boltzmann method (DMRT-LBM) is utilized to investigate the particle motion in a modeled room for the first time. The effect of indoor heating system location has been considered on both particle deposition and convective heat transfer so six different positions have been selected for the heating system. Results are shown for two Rayleigh numbers (104 and 105) and different particle sizes (1 μm and 10 μm). To study the particle motion, after the flow reaches steady state, 50000 particles are randomly injected to the room and the number of deposited particles on the walls has been reported for 100 s. Considering the present results, when the heating system is in the middle of the wall, the maximum heat transfer rate is seen for both Rayleigh numbers. Also, the number of deposited 1 μm particles on the walls for all locations of the heating system is zero for Ra= 104, so the number of suspended particles is the maximum. For both Rayleigh numbers and 10 μm particles, the number of deposited particles is maximum when the heating system is fixed on the top of the wall. It is also concluded that when the heating system is located on the top of the wall, the number of suspended 1 μm particles for Ra= 105 reaches its maximum value.