Direct numerical simulation of contaminant removal in presence of underfloor air distribution system
Indoor contaminant removal over 0.5 ≤ FrT ≤ 5.0, 0.5 ≤ N ≤ 5.0, and 50 ≤ Re ≤ 500 was investigated numerically, wherein FrT refers to the Froude number, N refers to the buoyancy ratio, and Re refers to the Reynolds number. As demonstrated, the ventilation effectiveness increased with increasing cont...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2024-01-01
|
| Series: | Heliyon |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2405844024003621 |
| _version_ | 1797328658076008448 |
|---|---|
| author | Yaowen Xia Saidong Lyu |
| author_facet | Yaowen Xia Saidong Lyu |
| author_sort | Yaowen Xia |
| collection | DOAJ |
| description | Indoor contaminant removal over 0.5 ≤ FrT ≤ 5.0, 0.5 ≤ N ≤ 5.0, and 50 ≤ Re ≤ 500 was investigated numerically, wherein FrT refers to the Froude number, N refers to the buoyancy ratio, and Re refers to the Reynolds number. As demonstrated, the ventilation effectiveness increased with increasing contaminant source intensity and air supply intensity at a constant air temperature, indicating that increase the fresh air can effectively eliminate contaminants in this case. At high air supply temperatures, the heat retention time and contaminant transport was extremely short, and the fresh air induced by strong natural convection floating lift was rapidly discharged. Additioanlly, the air supply intensity had significant effects on contaminant removal. Quantification of the ventilation effectiveness under the combined effects of air supply intensity, air supply temperature and contaminant source intensity was determined based on the results of direct numerical simulations. |
| first_indexed | 2024-03-08T06:54:51Z |
| format | Article |
| id | doaj.art-58cc51a0f63040818945df44f9ec37e8 |
| institution | Directory Open Access Journal |
| issn | 2405-8440 |
| language | English |
| last_indexed | 2024-03-08T06:54:51Z |
| publishDate | 2024-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Heliyon |
| spelling | doaj.art-58cc51a0f63040818945df44f9ec37e82024-02-03T06:36:58ZengElsevierHeliyon2405-84402024-01-01102e24331Direct numerical simulation of contaminant removal in presence of underfloor air distribution systemYaowen Xia0Saidong Lyu1Corresponding author.; Key Laboratory of Rural Energy Engineering of Yunnan and Solar Energy Research Institute, Yunnan Normal University, Kunming, Yunnan, 650092, ChinaKey Laboratory of Rural Energy Engineering of Yunnan and Solar Energy Research Institute, Yunnan Normal University, Kunming, Yunnan, 650092, ChinaIndoor contaminant removal over 0.5 ≤ FrT ≤ 5.0, 0.5 ≤ N ≤ 5.0, and 50 ≤ Re ≤ 500 was investigated numerically, wherein FrT refers to the Froude number, N refers to the buoyancy ratio, and Re refers to the Reynolds number. As demonstrated, the ventilation effectiveness increased with increasing contaminant source intensity and air supply intensity at a constant air temperature, indicating that increase the fresh air can effectively eliminate contaminants in this case. At high air supply temperatures, the heat retention time and contaminant transport was extremely short, and the fresh air induced by strong natural convection floating lift was rapidly discharged. Additioanlly, the air supply intensity had significant effects on contaminant removal. Quantification of the ventilation effectiveness under the combined effects of air supply intensity, air supply temperature and contaminant source intensity was determined based on the results of direct numerical simulations.http://www.sciencedirect.com/science/article/pii/S2405844024003621Ventilation effectivenessContaminant removalCOVID-19Direct numerical simulation |
| spellingShingle | Yaowen Xia Saidong Lyu Direct numerical simulation of contaminant removal in presence of underfloor air distribution system Heliyon Ventilation effectiveness Contaminant removal COVID-19 Direct numerical simulation |
| title | Direct numerical simulation of contaminant removal in presence of underfloor air distribution system |
| title_full | Direct numerical simulation of contaminant removal in presence of underfloor air distribution system |
| title_fullStr | Direct numerical simulation of contaminant removal in presence of underfloor air distribution system |
| title_full_unstemmed | Direct numerical simulation of contaminant removal in presence of underfloor air distribution system |
| title_short | Direct numerical simulation of contaminant removal in presence of underfloor air distribution system |
| title_sort | direct numerical simulation of contaminant removal in presence of underfloor air distribution system |
| topic | Ventilation effectiveness Contaminant removal COVID-19 Direct numerical simulation |
| url | http://www.sciencedirect.com/science/article/pii/S2405844024003621 |
| work_keys_str_mv | AT yaowenxia directnumericalsimulationofcontaminantremovalinpresenceofunderfloorairdistributionsystem AT saidonglyu directnumericalsimulationofcontaminantremovalinpresenceofunderfloorairdistributionsystem |