Evaluation of some assumptions used in multizone airflow network models

被引：75
|
作者：
Wang, Liangzhu [1 ]
Chen, Qingyan [1 ]
机构：
[1] Purdue Univ, Sch Mech Engn, W Lafayette, IN 47907 USA
来源：
BUILDING AND ENVIRONMENT | 2008年 / 43卷 / 10期
关键词：
Air distribution; Multizone airflow model; Well-mixing assumption; Dimensional analysis; Contaminant transport;
D O I：
10.1016/j.buildenv.2007.10.010
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
Multizone airflow network models assume that in a zone air temperature and contaminant concentrations are uniform, and air momentum effects are neglected. These assumptions could cause errors for airflow with strong buoyancy, large contaminant concentration gradient, or strong momentum. This study has found the correlations of the errors and some dimensionless air parameters. The assumption of uniform air temperature is acceptable when the dimensionless temperature gradient is smaller than 0.03. The assumption of uniform contaminant concentration is valid if the corresponding Archimedes number for the source zone is greater than 400. The assumption of neglecting air momentum effect is reasonable when the jet momentum effect is dissipated before reaching an opening in downstream. (c) 2007 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1671 / 1677
页数：7
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