The influence of near-wall heat sources with different configurations on particle deposition in a small-scale chamber

Abstract

Understanding the coupling effect of multiple factors on particle deposition above the near-wall heat source is vital for human health, manufacturing, treasure protection and so on. This study investigated the concentrations and decay rate loss coefficient of particles in an experimental chamber with different heat-source configurations. Thirty-nine cases were created by changing the surface temperature and the shape of the near-wall heat source as well as the angular velocity of the six-bladed fan. The results reveal that the temperature, relative humidity, air velocity and the shape of the near-wall heat sources all exhibit different degrees of influence on the particle deposition. Also, the impacts of these factors on particle deposition on the vertical wall above near-wall heat sources can be further influenced by the size and location of particles.