TY - GEN
T1 - Effect of surface roughness on droplet resuspension behavior
AU - Wang, C. T.
AU - Leung, W. T.
AU - Fu, S. C.
AU - Li, Yuguo
AU - Law, Anthony K.Y.
AU - Chao, Christopher Y.H.
N1 - Funding Information:
This project was supported by a HKSAR Government Collaborative Research Fund (CRF) project (no. C7025-16G), General Research Fund (GRF) project (no. 16200315), and Science and Technology Planning Project of Guangdong Province, China. (no. 2017A050506010).
Publisher Copyright:
© 2018 15th Conference of the International Society of Indoor Air Quality and Climate, INDOOR AIR 2018. All rights reserved.
PY - 2018
Y1 - 2018
N2 - Resuspension of droplets from surfaces is an important indoor phenomenon. If the droplets are infectious, they would become a new source of airborne disease transmission. Since different kinds of materials that have different surface roughness are used in an indoor environment, investigation of the effect of surface roughness on droplet resuspension behavior is essential. Experiments were carried out by using a centrifuge. Unlike solid particles which detach as a whole, droplets detach by portion when they are under an increasing force field. The adhesive force between droplets and surfaces is found to be proportional to the contact diameter, and the adhesion coefficient is dependent on the roughness. Different from solid particles, the larger the roughness, the harder it is for droplets to be resuspended. This work reveals how roughness affects droplet resuspension and how droplet resuspension behavior differs from that of solid particles. This will be useful for risk assessment on disease transmission.
AB - Resuspension of droplets from surfaces is an important indoor phenomenon. If the droplets are infectious, they would become a new source of airborne disease transmission. Since different kinds of materials that have different surface roughness are used in an indoor environment, investigation of the effect of surface roughness on droplet resuspension behavior is essential. Experiments were carried out by using a centrifuge. Unlike solid particles which detach as a whole, droplets detach by portion when they are under an increasing force field. The adhesive force between droplets and surfaces is found to be proportional to the contact diameter, and the adhesion coefficient is dependent on the roughness. Different from solid particles, the larger the roughness, the harder it is for droplets to be resuspended. This work reveals how roughness affects droplet resuspension and how droplet resuspension behavior differs from that of solid particles. This will be useful for risk assessment on disease transmission.
KW - Adhesive force
KW - Aerosol
KW - Centrifuge
KW - Disease transmission
KW - Resuspension
UR - http://www.scopus.com/inward/record.url?scp=85105684551&partnerID=8YFLogxK
M3 - Conference article published in proceeding or book
AN - SCOPUS:85105684551
T3 - 15th Conference of the International Society of Indoor Air Quality and Climate, INDOOR AIR 2018
BT - 15th Conference of the International Society of Indoor Air Quality and Climate, INDOOR AIR 2018
PB - International Society of Indoor Air Quality and Climate
T2 - 15th Conference of the International Society of Indoor Air Quality and Climate, INDOOR AIR 2018
Y2 - 22 July 2018 through 27 July 2018
ER -