Numerical modeling of particles deposition in domestic floor heating systems

Abstract

Nowadays due to the variety of heating systems, efforts are being made to optimize each of these systems. Due to the fact that people spend most of their time in their home or indoors, providing cleaner and more comfortable air should also be of interest to researchers and developers of these systems. The floor heating system was initially introduced as the most ideal heating system and is used by many people. After the growth of floor heating systems, theories that this system, like other common heating systems such as radiator or heater systems, can move particles in the floor of living spaces and cause diseases such as allergies; has been raised. But some experts argue that radiation is the main mechanism of heat transfer in the floor heating system and that the system is unable to move and lift particles. A response to these two contradictory theories must be examined in order to further optimize these systems. In the present study, the effect of floor heating systems on the behavior of dust on the floor of the study area is investigated. The present work has been validated using the results of an experimental work in which the airflow within the desired geometry is investigated. In this study software (ANSYS-Fluent 19.1) and discrete phase model two-phase is used to simulate this model. By examining the results, it is found that the free displacement caused by the floor heating system and the inlet air from the window is capable of lifting and moving the particles on the floor at specified directions. Also, by examining the effective parameters on the displacement rate of these particles, including diameter, density and velocity of inlet air, it was observed that particles with less than 1 micrometer diameter and less than 750 kg/m³ density range can move in the geometry space studied.