| Zugriffsnummer | 53447 |
| Dokumenttyp | Konferenzartikel |
| Peer Review | unbekannt |
| Sprache | Englisch |
| Titel | High-fidelity modeling of the drying kinetics and lifetimes of saliva droplets in airborne transmission of COVID-19 |
| Autor(in); Institution |
Grosshans, Holger; 3.5, Explosionsschutz in der Energietechnik, PTB-Braunschweig
|
| Quelle/Jahr | 11th International Conference on Multiphase Flow, ICMF 2023, Kobe, Japan, April 2–7, 2023:(2023), 1 - 2 |
| Konferenzangaben | 11th International Conference on Multiphase Flow (ICMF), Kobe, 2-7, April, 2023, Japan |
| Freie Schlagworte | COVID-19 ; droplet evaporation ; airborne transmission ; aerosols |
| Zusammenfassung | To take effective measures against the spread of COVID-19 via respiratory droplets, transfer mechanisms must be well understood. The transport of saliva droplets is directly linked to their evaporation, as it affects the droplet size and final particle structure. As a result of changing particle properties, the aerodynamic forces and the consequent transport by surrounding air will be different. We developed an advanced evaporation model that takes into account not only the effect of solute-induced reduction on the evaporation rate but, also, heterogeneities that affect the final size and structure of droplets. To examine evaporation for different environments, we defined an inflation ratio, which is the ratio of increase in the volume of the final particle considering non-uniform droplet evaporation. We found a strong link between the ambient conditions and the mentioned ratio. Inflated particles float longer in air and, thus, can transmit viruses over larger distances compared to solid particles. In the final paper, we will present our CFD simulations of the spreading of inflated particles and compare to homogenous droplets. |
