Saliva Droplet Evaporation Experiment and Simple Correlation of Evaporation-falling Curve under Different Temperatures and RH
Abstract In the present study, water and saliva droplet evaporation rates are experimentally evaluated in various environmental conditions: temperature and relative humidity. We found that the ratio of saliva residue size to saliva initial droplet size is 0.216. We also found that the saliva correct...
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| Format: | Article |
| Language: | English |
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Springer
2023-01-01
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| Series: | Aerosol and Air Quality Research |
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| Online Access: | https://doi.org/10.4209/aaqr.220409 |
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| _version_ | 1823862812368175104 |
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| author | Dong-Bin Kwak Hayden D. Fischer David Y. H. Pui |
| author_facet | Dong-Bin Kwak Hayden D. Fischer David Y. H. Pui |
| author_sort | Dong-Bin Kwak |
| collection | DOAJ |
| description | Abstract In the present study, water and saliva droplet evaporation rates are experimentally evaluated in various environmental conditions: temperature and relative humidity. We found that the ratio of saliva residue size to saliva initial droplet size is 0.216. We also found that the saliva correction factor which is defined as a ratio of water evaporation coefficient to saliva evaporation coefficient was not affected by environmental conditions and was determined as 0.857. By considering the evaporation and gravitational settling effects, the saliva airborne lifetime, i.e., the evaporation-falling curve is numerically calculated and characterized. In addition to this numerical calculation results, we present the simple correlation equation for obtaining the evaporation-falling curve under different temperatures and relative humidity. |
| format | Article |
| id | doaj-art-664aa54c94eb410eb9d79ab4fda214ca |
| institution | Kabale University |
| issn | 1680-8584 2071-1409 |
| language | English |
| publishDate | 2023-01-01 |
| publisher | Springer |
| record_format | Article |
| series | Aerosol and Air Quality Research |
| spelling | doaj-art-664aa54c94eb410eb9d79ab4fda214ca2025-02-09T12:22:11ZengSpringerAerosol and Air Quality Research1680-85842071-14092023-01-0123311710.4209/aaqr.220409Saliva Droplet Evaporation Experiment and Simple Correlation of Evaporation-falling Curve under Different Temperatures and RHDong-Bin Kwak0Hayden D. Fischer1David Y. H. Pui2Particle Technology Laboratory, Mechanical Engineering, University of MinnesotaParticle Technology Laboratory, Mechanical Engineering, University of MinnesotaParticle Technology Laboratory, Mechanical Engineering, University of MinnesotaAbstract In the present study, water and saliva droplet evaporation rates are experimentally evaluated in various environmental conditions: temperature and relative humidity. We found that the ratio of saliva residue size to saliva initial droplet size is 0.216. We also found that the saliva correction factor which is defined as a ratio of water evaporation coefficient to saliva evaporation coefficient was not affected by environmental conditions and was determined as 0.857. By considering the evaporation and gravitational settling effects, the saliva airborne lifetime, i.e., the evaporation-falling curve is numerically calculated and characterized. In addition to this numerical calculation results, we present the simple correlation equation for obtaining the evaporation-falling curve under different temperatures and relative humidity.https://doi.org/10.4209/aaqr.220409SARS-CoV-2Evaporation-falling curveSaliva evaporation |
| spellingShingle | Dong-Bin Kwak Hayden D. Fischer David Y. H. Pui Saliva Droplet Evaporation Experiment and Simple Correlation of Evaporation-falling Curve under Different Temperatures and RH Aerosol and Air Quality Research SARS-CoV-2 Evaporation-falling curve Saliva evaporation |
| title | Saliva Droplet Evaporation Experiment and Simple Correlation of Evaporation-falling Curve under Different Temperatures and RH |
| title_full | Saliva Droplet Evaporation Experiment and Simple Correlation of Evaporation-falling Curve under Different Temperatures and RH |
| title_fullStr | Saliva Droplet Evaporation Experiment and Simple Correlation of Evaporation-falling Curve under Different Temperatures and RH |
| title_full_unstemmed | Saliva Droplet Evaporation Experiment and Simple Correlation of Evaporation-falling Curve under Different Temperatures and RH |
| title_short | Saliva Droplet Evaporation Experiment and Simple Correlation of Evaporation-falling Curve under Different Temperatures and RH |
| title_sort | saliva droplet evaporation experiment and simple correlation of evaporation falling curve under different temperatures and rh |
| topic | SARS-CoV-2 Evaporation-falling curve Saliva evaporation |
| url | https://doi.org/10.4209/aaqr.220409 |
| work_keys_str_mv | AT dongbinkwak salivadropletevaporationexperimentandsimplecorrelationofevaporationfallingcurveunderdifferenttemperaturesandrh AT haydendfischer salivadropletevaporationexperimentandsimplecorrelationofevaporationfallingcurveunderdifferenttemperaturesandrh AT davidyhpui salivadropletevaporationexperimentandsimplecorrelationofevaporationfallingcurveunderdifferenttemperaturesandrh |