Evaporation of an aerosol plume from an inkjet printhead DOI Creative Commons
Xavier Lefebvre, Étienne Robert

Research Square (Research Square), Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 14, 2024

Abstract The size of aerosol droplets is a critical factor in evaluating the risks associated with airborne pathogen transmission, yet it highly variable due to evaporation. Additionally, close proximity water within an plume can slow their evaporation, thereby further complicating risk assessments. To investigate these complexities, versatile experimental setup was developed using XAAR XJ128 inkjet printhead generate 50 μm diameter for detailed evaporation characterization plume. droplet process monitored via Phase Doppler Anemometry (PDA), which provided distribution and velocity measurements at various positions along vertical axis falling droplets. These results were compared theoretical model isolated quiescent air. Droplet number density significantly influenced measured rates plume, originally relative humidity 30%, comparable under 60-80% when nearly all nozzles active. effect on also analytically evaluated. Notably, complete this configuration could theoretically increase up 89% locally used, while about one-third resulted local 33%. insights underscore importance investigating dynamics context transmission. use demonstrates its significant potential generating controlled offering promising avenue future research area.

Language: Английский

Determining the ultraviolet radiation dose experienced by aerosols using ultraviolet-sensitive dyes DOI Creative Commons
Qingqing Fu,

Frank Einar Kruis

Aerosol Research, Journal Year: 2024, Volume and Issue: 2(1), P. 77 - 92

Published: May 17, 2024

Abstract. ​​​​​​​The application of ultraviolet (UV)-light-based air disinfection methods holds promise but also presents several challenges. Among these, the quantitative determination required UV radiation dose for aerosols is particularly significant. This study explores possibility determining experienced by without use virus-containing aerosols, circumventing associated laboratory safety issues. To achieve this, we developed a model system comprised UV-sensitive dyes dissolved in di-ethyl-hexyl-sebacate (DEHS), which facilitates generation non-evaporating and UV-degradable aerosols. For selection dyes, 20 were tested, 2 them selected as being most suitable, according to criteria. Dye-laden aerosol droplets generated using commercial generator subsequently exposed UV-C laboratory-built irradiation chamber. We designed low-pressure impactor collect pre- post-UV exposure. Dye degradation, result light exposure, was then analyzed assessing concentration changes collected dye solutions UV-visible spectrophotometer. Our findings revealed that 245 mW s cm−2 resulted 10 % while lower 21.6 produced 5 degradation. In conclusion, our demonstrates feasibility containing determine an aerosol.

Language: Английский

Citations

0
Evaporation of an aerosol plume from an inkjet printhead DOI Creative Commons
Xavier Lefebvre, Étienne Robert

Research Square (Research Square), Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 14, 2024

Abstract The size of aerosol droplets is a critical factor in evaluating the risks associated with airborne pathogen transmission, yet it highly variable due to evaporation. Additionally, close proximity water within an plume can slow their evaporation, thereby further complicating risk assessments. To investigate these complexities, versatile experimental setup was developed using XAAR XJ128 inkjet printhead generate 50 μm diameter for detailed evaporation characterization plume. droplet process monitored via Phase Doppler Anemometry (PDA), which provided distribution and velocity measurements at various positions along vertical axis falling droplets. These results were compared theoretical model isolated quiescent air. Droplet number density significantly influenced measured rates plume, originally relative humidity 30%, comparable under 60-80% when nearly all nozzles active. effect on also analytically evaluated. Notably, complete this configuration could theoretically increase up 89% locally used, while about one-third resulted local 33%. insights underscore importance investigating dynamics context transmission. use demonstrates its significant potential generating controlled offering promising avenue future research area.

Language: Английский

Citations

0