单室分散研究中多盒气溶胶模型几何布局的比较

IF 0.7 4区 计算机科学 Q4 COMPUTER SCIENCE, CYBERNETICS Presence-Teleoperators and Virtual Environments Pub Date : 2018-04-24 DOI:10.3390/ENVIRONMENTS5050052
A. Jensen, M. D. Maso, A. Koivisto, E. Belut, A. Meyer‐Plath, M. Tongeren, A. S. Jiménez, I. Tuinman, M. Domat, J. Toftum, I. Koponen
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引用次数: 18

摘要

模型越来越多地用于估计和预先计算空气中释放的颗粒物的职业暴露。典型的双箱模型假设瞬时和完全混合的空气体积,这可能会在快速过程、缓慢空气混合和/或大体积的情况下导致问题。在这项研究中,我们提出了一个气溶胶分散模型,并通过将模拟浓度与室内实验中测量的浓度进行比较来验证它。我们研究了是否可以通过使用不同的几何布局而不是典型的双箱布局来更好地估计浓度。使用了一个盒子,两个盒子和两个三个盒子的布局。发现单框模型低估了源附近的浓度,而高估了远场的浓度。通过对源浓度稳定的慢速混合和快速混合系统的实验对比,双箱模型布局表现良好。在相对缓慢的混合条件下,三盒布局比一盒或两盒布局能更好地估计浓度和波动浓度的峰值时间。这一发现表明,应该在实践中对行业相关的规模进行测试,以获得更多关于何时在多盒模型中使用两盒或三盒布局方案的知识。
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Comparison of Geometrical Layouts for a Multi-Box Aerosol Model from a Single-Chamber Dispersion Study
Models are increasingly used to estimate and pre-emptively calculate the occupational exposure of airborne released particulate matter. Typical two-box models assume instant and fully mixed air volumes, which can potentially cause issues in cases with fast processes, slow air mixing, and/or large volumes. In this study, we present an aerosol dispersion model and validate it by comparing the modelled concentrations with concentrations measured during chamber experiments. We investigated whether a better estimation of concentrations was possible by using different geometrical layouts rather than a typical two-box layout. A one-box, two-box, and two three-box layouts were used. The one box model was found to underestimate the concentrations close to the source, while overestimating the concentrations in the far field. The two-box model layout performed well based on comparisons from the chamber study in systems with a steady source concentration for both slow and fast mixing. The three-box layout was found to better estimate the concentrations and the timing of the peaks for fluctuating concentrations than the one-box or two-box layouts under relatively slow mixing conditions. This finding suggests that industry-relevant scaled volumes should be tested in practice to gain more knowledge about when to use the two-box or the three-box layout schemes for multi-box models.
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来源期刊
CiteScore
2.20
自引率
0.00%
发文量
8
审稿时长
>12 weeks
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