Direct numerical simulation of contaminant removal in presence of underfloor air distribution system

被引：1
|
作者：
Xia, Yaowen [1 ,2 ]
Lyu, Saidong [1 ,2 ]
机构：
[1] Yunnan Normal Univ, Key Lab Rural Energy Engn Yunnan, Kunming 650092, Yunnan, Peoples R China
[2] Yunnan Normal Univ, Solar Energy Res Inst, Kunming 650092, Yunnan, Peoples R China
来源：
HELIYON | 2024年 / 10卷 / 02期
基金：
中国国家自然科学基金;
关键词：
Ventilation effectiveness; Contaminant removal; COVID-19; Direct numerical simulation; DIFFUSIVE NATURAL-CONVECTION; THERMAL COMFORT; ENERGY; CAVITY; TEMPERATURE; MODEL;
D O I：
10.1016/j.heliyon.2024.e24331
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
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.
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收藏
页数：14
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