Studying passive ultrafine particle dispersion in a room with a heat source
Studying passive ultrafine particle dispersion in a room with a heat source
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DOI：
10.1016/j.buildenv.2013.09.012
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发表时间：
2014-01-01
影响因子：
7.4
通讯作者：
Afshari, Alireza
中科院分区：
文献类型：
--
作者：
Ardkapan, Siamak R.;Nielsen, Peter V.;Afshari, Alireza
由于颗粒对人体健康的影响，房间内颗粒的分布引起了人们的极大兴趣。使用计算流体动力学，可以研究房间中粒子的行为。在本研究中，使用商业软件STAR-CCM+来模拟具有置换通风系统的房间中被动颗粒的扩散。此外，还进行了一些实验来验证模拟结果的准确性。根据实验和开放前模拟的比较，k-epsilon 模型似乎比 k-omega 模型给出了更好的结果。结果表明，为了获得准确的结果，辐射效应的模拟至关重要。此外，粒子模拟结果表明，当被动粒子源高度为1.5 m、加热器高度为0.5 m时，室内平均浓度最低。根据颗粒源高度和加热器位置，平均颗粒浓度分布会发生变化。在偏远地区，上层区域和下层区域的浓度分布没有表现出任何显着差异。 (C) 2013 Elsevier Ltd. 保留所有权利。
The distribution of particles in a room is of great interest because of the effect of particles on human health. Using computational fluid dynamics, it is possible to study the behaviour of particles in a room. In this study, the commercial software STAR-CCM+ was used to simulate the dispersion of passive particles in a room with displacement ventilation system. In addition, some experiments are performed to verify the accuracy of the simulation results. According to the comparison of the experiment and the simulations in front of supply opening, the k-epsilon model seems to give better results than the k-omega to model. It is shown that, in order to have an accurate result, the simulation of radiation effect is essential. Furthermore, the results of particle simulations show that when the passive particle source is in the height of 1.5 m and the heater is at the height of 0.5 m, the average concentration in the room is the lowest. Depending on the particle source height and heater location, the average particle concentration profile will change. In remote areas, the concentration profile does not show any significant difference between upper zone and lower zone. (C) 2013 Elsevier Ltd. All rights reserved.