A STUDY OF AEROSOL TRANSPORT USING VORTEX METHODS

使用涡流法研究气溶胶传输

• 批准号: 6031411
• 负责人: Michael R. Flynn
• 金额: $ 3.52万
• 依托单位: UNIV OF NORTH CAROLINA CHAPEL HILL
• 依托单位国家: 美国
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-09-30 至 2001-09-29
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/6031411
• 关键词: aerosols; air filtration; air sampling /monitoring; biomedical equipment; computer data analysis; computer simulation; environmental contamination; environmental protection; mathematical model; model design /development; occupational health /safety; particle; work site

The long-term objective of this small grant is to develop a computational fluid dynamics model to predict the concentration of polydisperse aerosols within the breathing zone of a worker. A pilot study to model monodisperse aerosol transport is proposed here. Because the deposition site of aerosols within the respiratory system depends on the particle size and density, a predictive model such as this would be useful for occupational exposure assessment in indoor work environments. Specific applications include: (1) quantitative judgment of particle concentration and size within the breathing zone for use in epidemiological studies, (2) selection of the appropriate personal protective equipment on the basis of particle size, (3) identification of the human-machine configurations which exacerbate or minimize risk of exposure to inspirable and respirable aerosols, and (3) testing the design of local exhaust ventilation systems to minimize these exposures. The pilot project will consist of writing a computer program to model the transport of monodisperse aerosols in the near wake of a bluff body representing the worker. Results of the numerical simulations will be compared with experimental data in order to evaluate the accuracy of the algorithm. Data from previous experiments have been made available to the investigators.

这个小赠款的长期目标是开发一个计算流体动力学模型，以预测工人呼吸区内多分散气溶胶的浓度。此处提出了一项试点研究，以模拟单分散气溶胶运输。由于呼吸系统中气溶胶的沉积位点取决于粒度和密度，因此类似的预测模型对于在室内工作环境中的职业暴露评估很有用。 具体应用包括：（1）在流行病学研究中使用颗粒浓度和尺寸的定量判断，（2）根据粒径选择适当的个人防护设备，（（3）鉴定人类光销构型的识别，这些构型识别人类机器人的构型，这些配置加剧或最大程度地限制了可鼓舞和呼吸的气体化系统测试的风险，并将其用于局部测试。试点项目将包括编写计算机程序，以建模在代表工人的虚张声势的近乎声音中单分散气溶胶的运输。 数值模拟的结果将与实验数据进行比较，以评估算法的准确性。 研究人员已提供了先前实验的数据。