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MODELING OF AIRFLOW AND CONTAMINANT DISTRIBUTION

气流和污染物分布建模

基本信息

批准号：
2794355
负责人：
Lorraine M Conroy
金额：
$ 2.53万
依托单位：
UNIVERSITY OF ILLINOIS AT CHICAGO
依托单位国家：
美国
项目类别：
财政年份：
1999
资助国家：
美国
起止时间：
1999-03-04 至
项目状态：
未结题

来源：
https://reporter.nih.gov/project-details/2794355
关键词：
computer simulation environmental air flow environmental contamination fluidity hospitals mathematical model model design /development occupational hazard work site

项目摘要

21. DESCRIPTION The broad, long-term objective of this research is to validate computational fluid dynamics (CFD) modeling technique for use in predicting workplace exposure to hazardous substances and in evaluation of control or intervention alternatives. The specific aims of the project are to answer the following questions: a) Can CFD codes be written to stimulate complex workspaces? and b) Can these codes be applied to three specific applications (open tank processes, TB isolation rooms, hospital waiting rooms)? CFD modeling and simulation may be very useful tools in design and troubleshooting of ventilation systems used to control release of hazardous substances in workplaces. However, before these methods are widely accepted, they need to be validated. Models to describe air flow and concentration distributions in and around open tank type processes and to describe airflow and temperature distribution in large spaces have been developed. These models are largely two-dimensional and have been validated in the laboratory with controlled local exhaust ventilation (LEV) hood flow rates and crossdraft velocities (magnitude and direction). The results of the laboratory experiments and CFD simulations show impressive agreement. I have conducted field studies of industrial hospital ventilation systems resulting in large data sets collected during normal operations. The proposed research will develop three-dimensional models and validate them with laboratory experiments under controlled conditions and further to apply the models to the field data to determine the applicability of CFD simulations to "real life" situations. This project will result in CFD models that are applicable to complicated industrial and hospital spaces and provide information on the validity of using CFD models to describe airflow and contaminant distribution in these spaces. CFD modeling, if validated, should result in more efficient assessment of hazardous conditions and evaluation of intervention strategies.

21.描述这项研究的长期目标是验证计算流体动力学（CFD）建模技术，用于预测工作场所接触有害物质的情况，控制或干预的替代方案。该委员会的具体目标项目是为了回答以下问题：a）CFD代码可以是为了刺激复杂的神经系统吗和B）这些代码可以是适用于三种特定的应用（开放罐工艺，TB 隔离室、医院候诊室）？CFD建模与仿真可能是通风设计和故障排除中非常有用的工具用于控制工作场所有害物质释放的系统。然而，在这些方法被广泛接受之前，验证.描述气流和浓度分布的模型在敞开罐型工艺中和周围，并描述气流，已经开发了大空间中的温度分布。这些模型主要是二维的，并已在具有受控局部排气通风（LEV）罩流的实验室速度和横向气流速度（大小和方向）。结果实验室实验和CFD模拟显示，协议我对工业医院进行了实地研究，通风系统导致在正常情况下收集大量数据集运营拟议的研究将开发三维模型并在受控条件下通过实验室实验进行验证条件，并进一步将模型应用于现场数据，确定计算流体动力学模拟对“真实的生活”的适用性 situations.该项目将产生适用的CFD模型复杂的工业和医院空间，并提供有关使用CFD模型描述气流和污染物的有效性分布在这些空间。CFD建模，如果验证，应导致在更有效地评估危险情况和评估干预策略。