在实验室内使用花岩台面进行室内分布的CFD建模
Bahareh Azarvand-Hassanfard1, Mojtaba Gholami2
1Department of Physics, Payame Noor University, Tehran, Iran. b.azarvand@pnu.ac.ir.
Radiation and environmental biophysics
|June 7, 2025
概括
花岩台面显著增加室内气水平,造成肺癌风险. 计算流体动力学建模确定了局部积区,突出了针对性通风策略的需要.
科学领域:
- 环境科学 环境科学
- 室内空气质量 室内空气质量
- 辐射保护 辐射保护
背景情况:
- 气是室内辐射暴露的主要原因,也是肺癌的主要原因.
- 石岩是一种常见的建筑材料,可以是气排出的来源.
- 了解室内环境中的行为对于公共健康至关重要.
研究的目的:
- 用计算流体动力学 (CFD) 在实验室中用花岩台面建模和分析气的行为和分布.
- 通过实验测量子度和呼气速率来验证数值模拟.
- 为了确定积的区域,并评估自然通风的有效性.
主要方法:
- 在ANSYS Fluent中开发一个实验室空间的3D CFD模型,结合几何,通风和呼气源.
- 从花岩台面和其他表面测量气排气速率的实验测量.
- 在呼吸高度上模拟子度,并与实验数据进行验证.
主要成果:
- 在安装具有6.5 Bq m−2 h−1.1的排气率的花岩台面后,平均子度增加了30%.
- 在CFD模拟中,确定了靠近柜台的特定区域,其中度超过了美国环保署的148 Bq/m3的行动值.
- 由于复杂的空气流模式,自然通风在降低水平的有效性在柜台附近减少,导致呼吸区的积累.
结论:
- 像CFD这样的数值方法可以准确预测气堆积中心和空气流动模式.
- 花岩台面可以显著导致室内水平升高,特别是在呼吸区.
- 有针对性的通风策略,如局部排气,对于在关键区域减轻暴露至关重要.
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