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首页> 外文期刊>Building and Environment >Studying passive ultrafine particle dispersion in a room with a heat source
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Studying passive ultrafine particle dispersion in a room with a heat source

机译：在有热源的房间里研究被动超细颗粒的分散

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摘要

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-ε model seems to give better results than the k-ε 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.
机译：由于颗粒对人体健康的影响，房间中颗粒的分布引起人们极大的兴趣。使用计算流体动力学，可以研究房间中粒子的行为。在这项研究中，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粒子的扩散。另外，还进行了一些实验以验证仿真结果的准确性。根据实验和供应开放前模拟的比较，k-ε模型似乎比k-ε模型提供更好的结果。结果表明，为了获得准确的结果，模拟辐射效果至关重要。此外，粒子模拟的结果表明，当被动粒子源处于1.5 m的高度而加热器处于0.5 m的高度时，室内的平均浓度最低。取决于粒子源高度和加热器位置，平均粒子浓度曲线将改变。在偏远地区，浓度曲线在上部区域和下部区域之间没有显示任何显着差异。

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