Analysis of the spread of cough droplets and body deposition fraction in the smart classroom in different seasons
Smart classrooms are a relatively confined public space for college students. SARS-COV-2 and other respiratory viruses have been shown to pose a more significant threat to human health in relatively confined spaces. Using numerical simulation method to simulate the transmission and concentration dis...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2022-09-01
|
| Series: | Hygiene and Environmental Health Advances |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2773049222000150 |
| _version_ | 1797753927420084224 |
|---|---|
| author | Mengfan Jia Dan Mei Jiaqian Li Zihan Liu Wenzhu Duan Shanshan Hou |
| author_facet | Mengfan Jia Dan Mei Jiaqian Li Zihan Liu Wenzhu Duan Shanshan Hou |
| author_sort | Mengfan Jia |
| collection | DOAJ |
| description | Smart classrooms are a relatively confined public space for college students. SARS-COV-2 and other respiratory viruses have been shown to pose a more significant threat to human health in relatively confined spaces. Using numerical simulation method to simulate the transmission and concentration distribution of virus-carrying droplets in smart classrooms in three different seasons (summer, winter, transitional seasons: spring and autumn). The Realizable k-ε model is used to simulate the airflow pattern in the smart classroom, and the Lagrangian method is used to simulate the transmission of droplets. The transmission process of droplets produced from the teacher standing on the platform and the student sitting on the seat is studied. The influence of three kinds of outdoor temperature on droplet transmission and the body deposition fraction of people in the smart classroom is analyzed. The results show that droplet transmission speed is maximum at the temperature of 5 degrees when the outdoor temperature is 5 °C, 20 °C, and 35 °C respectively. At 10 s, the transmission distance of droplets increases by 9.55% compared with that at 20 °C and 10.31% compared with that at 35 °C. In addition, the body deposition fraction is also affected by the location of the vent, with downwind contact being 6 times more likely than upwind contact. The research results can provide suggestions and measures for epidemic prevention and control in smart classrooms. |
| first_indexed | 2024-03-12T17:25:03Z |
| format | Article |
| id | doaj.art-f53deb46ab4c4a61a23d87106896d6ca |
| institution | Directory Open Access Journal |
| issn | 2773-0492 |
| language | English |
| last_indexed | 2024-03-12T17:25:03Z |
| publishDate | 2022-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Hygiene and Environmental Health Advances |
| spelling | doaj.art-f53deb46ab4c4a61a23d87106896d6ca2023-08-05T05:18:19ZengElsevierHygiene and Environmental Health Advances2773-04922022-09-013100015Analysis of the spread of cough droplets and body deposition fraction in the smart classroom in different seasonsMengfan Jia0Dan Mei1Jiaqian Li2Zihan Liu3Wenzhu Duan4Shanshan Hou5College of Resources and Environmental Engineering, Wuhan University of Science and Technology, Wuhan, 430081, Hubei, China; School of Mechanical &Automotive Engineering, South China University of Technology, Guangzhou, 510641, Guangdong, ChinaCollege of Resources and Environmental Engineering, Wuhan University of Science and Technology, Wuhan, 430081, Hubei, China; Corresponding author:College of Resources and Environmental Engineering, Wuhan University of Science and Technology, Wuhan, 430081, Hubei, ChinaCollege of Resources and Environmental Engineering, Wuhan University of Science and Technology, Wuhan, 430081, Hubei, China; Northeastern University School of Resources and Civil Engineering, Northeastern University, Shenyang, 110819, Liaoning, ChinaCollege of Resources and Environmental Engineering, Wuhan University of Science and Technology, Wuhan, 430081, Hubei, ChinaCollege of Resources and Environmental Engineering, Wuhan University of Science and Technology, Wuhan, 430081, Hubei, China; School of Mechanical &Automotive Engineering, South China University of Technology, Guangzhou, 510641, Guangdong, ChinaSmart classrooms are a relatively confined public space for college students. SARS-COV-2 and other respiratory viruses have been shown to pose a more significant threat to human health in relatively confined spaces. Using numerical simulation method to simulate the transmission and concentration distribution of virus-carrying droplets in smart classrooms in three different seasons (summer, winter, transitional seasons: spring and autumn). The Realizable k-ε model is used to simulate the airflow pattern in the smart classroom, and the Lagrangian method is used to simulate the transmission of droplets. The transmission process of droplets produced from the teacher standing on the platform and the student sitting on the seat is studied. The influence of three kinds of outdoor temperature on droplet transmission and the body deposition fraction of people in the smart classroom is analyzed. The results show that droplet transmission speed is maximum at the temperature of 5 degrees when the outdoor temperature is 5 °C, 20 °C, and 35 °C respectively. At 10 s, the transmission distance of droplets increases by 9.55% compared with that at 20 °C and 10.31% compared with that at 35 °C. In addition, the body deposition fraction is also affected by the location of the vent, with downwind contact being 6 times more likely than upwind contact. The research results can provide suggestions and measures for epidemic prevention and control in smart classrooms.http://www.sciencedirect.com/science/article/pii/S2773049222000150Droplet transmissionTransmission distanceExhaled heightBody deposition fraction |
| spellingShingle | Mengfan Jia Dan Mei Jiaqian Li Zihan Liu Wenzhu Duan Shanshan Hou Analysis of the spread of cough droplets and body deposition fraction in the smart classroom in different seasons Hygiene and Environmental Health Advances Droplet transmission Transmission distance Exhaled height Body deposition fraction |
| title | Analysis of the spread of cough droplets and body deposition fraction in the smart classroom in different seasons |
| title_full | Analysis of the spread of cough droplets and body deposition fraction in the smart classroom in different seasons |
| title_fullStr | Analysis of the spread of cough droplets and body deposition fraction in the smart classroom in different seasons |
| title_full_unstemmed | Analysis of the spread of cough droplets and body deposition fraction in the smart classroom in different seasons |
| title_short | Analysis of the spread of cough droplets and body deposition fraction in the smart classroom in different seasons |
| title_sort | analysis of the spread of cough droplets and body deposition fraction in the smart classroom in different seasons |
| topic | Droplet transmission Transmission distance Exhaled height Body deposition fraction |
| url | http://www.sciencedirect.com/science/article/pii/S2773049222000150 |
| work_keys_str_mv | AT mengfanjia analysisofthespreadofcoughdropletsandbodydepositionfractioninthesmartclassroomindifferentseasons AT danmei analysisofthespreadofcoughdropletsandbodydepositionfractioninthesmartclassroomindifferentseasons AT jiaqianli analysisofthespreadofcoughdropletsandbodydepositionfractioninthesmartclassroomindifferentseasons AT zihanliu analysisofthespreadofcoughdropletsandbodydepositionfractioninthesmartclassroomindifferentseasons AT wenzhuduan analysisofthespreadofcoughdropletsandbodydepositionfractioninthesmartclassroomindifferentseasons AT shanshanhou analysisofthespreadofcoughdropletsandbodydepositionfractioninthesmartclassroomindifferentseasons |