A methodology is proposed for modeling the diffusion of fragrances released from a moving source. First, we started with a one‐dimensional model considering molecular diffusion of α‐pinene in air as the only mass transport mechanism. The validation was performed in a diffusion tube, and a system was developed to move the scented source along the axial direction. Results showed that experimental data fitted well with the numerical simulation, suggesting this model as a valid tool to describe the trail of a fragrance released from a moving source for low Re of the order of 10. In the case of a person walking at the speed of 1.34 m/s in a room or corridor inside a building, three‐dimensional models are required and mass transport of the perfume to the surrounding air will be dominated by turbulent diffusion or eddy diffusion D_t which is two orders of magnitude higher than molecular diffusion. © 2018 American Institute of Chemical Engineers AIChE J, 64: 2890–2897, 2018

中文翻译：

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香水的踪迹

提出了一种用于模拟从移动源释放的香气扩散的方法。首先，我们从一维模型开始，将α-pine烯在空气中的分子扩散视为唯一的质量传输机制。验证是在扩散管中进行的，并且开发了一种系统来沿轴向移动香气源。结果表明，实验数据与数值模拟非常吻合，表明该模型是描述从低Re到10量级的移动源释放的香气轨迹的有效工具。建筑物的房间或走廊中的速度为1.34 m / s，则需要使用三维模型，并且湍流扩散或涡流扩散将主导香水向周围空气的大规模传输D_t比分子扩散高两个数量级。©2018美国化学工程师学会AIChE J，64：2890–2897，2018