TY - JOUR
T1 - Numerical investigation on indoor aerosol dispersion due to natural ventilation with single-sided opening
AU - Muto, Yuta
AU - Lee, Sihwan
AU - Kurabuchi, Takashi
AU - Kim, Jeongil
AU - Hwang, Jaeung
N1 - Publisher Copyright:
© The Authors, published by EDP Sciences, 2023.
PY - 2023/6/16
Y1 - 2023/6/16
N2 - The purpose of this study is to evaluate the characteristics of ventilation runoff of particles. Using CFD analysis, the indoor space with the single-side opening model is filled with particles and passive scalar to provide differential temperature ventilation. The RANS and the LES analysis methods, as well as the size and the number of particles generated in a room, will be changed to compare the indoor concentration and ventilation rate trends. The particles are assumed to be water particles that do not evaporate. As the result with the turbulence models, the LES analysis tended to be closer to the passive scalar and theoretical behavior characteristics for small particles than the RANS analysis, because the diffusion of particles is also considered. As the result with the number of particles, the behavior characteristics of the LES analysis became closer to that of the passive scalar as the number of particles increased. As the result of the size of particles, in this model particles larger than 10 μm are deposited indoors by gravitational settling, increasing the percentage removed from the indoors. Therefore, it can be concluded that the risk of infection is reduced without ventilation for particles above 10 μm in this model.
AB - The purpose of this study is to evaluate the characteristics of ventilation runoff of particles. Using CFD analysis, the indoor space with the single-side opening model is filled with particles and passive scalar to provide differential temperature ventilation. The RANS and the LES analysis methods, as well as the size and the number of particles generated in a room, will be changed to compare the indoor concentration and ventilation rate trends. The particles are assumed to be water particles that do not evaporate. As the result with the turbulence models, the LES analysis tended to be closer to the passive scalar and theoretical behavior characteristics for small particles than the RANS analysis, because the diffusion of particles is also considered. As the result with the number of particles, the behavior characteristics of the LES analysis became closer to that of the passive scalar as the number of particles increased. As the result of the size of particles, in this model particles larger than 10 μm are deposited indoors by gravitational settling, increasing the percentage removed from the indoors. Therefore, it can be concluded that the risk of infection is reduced without ventilation for particles above 10 μm in this model.
UR - http://www.scopus.com/inward/record.url?scp=85164500428&partnerID=8YFLogxK
U2 - 10.1051/e3sconf/202339602013
DO - 10.1051/e3sconf/202339602013
M3 - Conference article
AN - SCOPUS:85164500428
SN - 2555-0403
VL - 396
JO - E3S Web of Conferences
JF - E3S Web of Conferences
M1 - 02013
T2 - 11th International Conference on Indoor Air Quality, Ventilation and Energy Conservation in Buildings, IAQVE C2023
Y2 - 20 May 2023 through 23 May 2023
ER -