Visualization of human boundary layer and mouth breathing based on planar laser scattering

JIANG Yurong; SU Baocheng; CHEN He; CHEN Siying; GUO Pan; HU Rui; TIAN Kuntai; LI Xin; WU Huiyun; HUANG Shuhai; SUN Zhenhai

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Visualization of human boundary layer and mouth breathing based on planar laser scattering

Beijing Institate of Technology 85th Anniversary | 更新时间：2025-09-22

- Visualization of human boundary layer and mouth breathing based on planar laser scattering
- OPTICAL TECHNIQUE Vol. 51, Issue 5, Pages: 513-520(2025)
- 作者机构：
  
  1.北京理工大学光电学院光电成像技术与系统教育部重点实验室，北京 100081
  2.军事科学院军事医学研究院，北京 100850
- 作者简介：
- 基金信息：
- DOI：
  CLC： TP394.1;TH691.9
- Received：26 March 2025，
  
  Revised：2025-06-13，
  
  Published：20 September 2025
- 稿件说明：
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蒋玉蓉,苏宝城,陈和等.基于平面激光散射的人体边界层及口呼吸可视化研究[J].光学技术,2025,51(05):513-520.

JIANG Yurong,SU Baocheng,CHEN He,et al.Visualization of human boundary layer and mouth breathing based on planar laser scattering[J].OPTICAL TECHNIQUE,2025,51(05):513-520.
蒋玉蓉,苏宝城,陈和等.基于平面激光散射的人体边界层及口呼吸可视化研究[J].光学技术,2025,51(05):513-520. DOI：

JIANG Yurong,SU Baocheng,CHEN He,et al.Visualization of human boundary layer and mouth breathing based on planar laser scattering[J].OPTICAL TECHNIQUE,2025,51(05):513-520. DOI：

摘要

人体边界层及口呼吸的动态可视化在呼吸道疾病传播研究和个体防护策略优化等领域具有重要意义。为此，提出一种基于平面激光散射（PLS）的可视化方法，用于研究人体口呼吸与边界层热羽流的相互作用。方法通过扇形片状激光照射人体模型，利用气溶胶示踪粒子显示气流，并使用高灵敏度sCMOS相机捕获粒子散射信号。采用背景扣除、激光强度校正等图像处理算法和三维重建方法，实现了人体边界层热羽流及口呼吸气流的二、三维动态可视化。实验结果表明，方法能够清晰地呈现人体表面边界层热羽流的上升过程，揭示口呼吸气流对热羽流的干扰作用，并重建口呼吸气流的三维空间分布及其与边界层的相互作用。方法为研究人体呼吸过程与环境气流的相互影响，以及深入理解呼吸道疾病传播机制提供了一种新的技术手段。

Abstract

Dynamic visualization of the human boundary layer and oral breathing is of significant importance in respiratory disease transmission research and optimization of individual protection strategies. To this end

a visualization method based on Planar Laser Scattering （PLS） is proposed to investigate the interaction between human oral breathing and the boundary layer thermal plume. In this method

a human model is illuminated with a fan-shaped laser sheet

aerosol tracer particles are used to visualize the airflow

and a high-sensitivity sCMOS camera captures the particle scattering signals. By employing image processing algorithms such as background subtraction and laser intensity correction

along with a three-dimensional reconstruction method

two- and three-dimensional dynamic visualization of the human boundary layer thermal plume and oral breathing airflow is achieved. Experimental results demonstrate that this method can clearly visualize the rising process of the human surface boundary layer thermal plume

reveal the interference of oral breathing airflow with the thermal plume

and reconstruct the three-dimensional spatial distribution of the oral breathing airflow and its interaction with the boundary layer. This method provides a novel technical approach for studying the interaction between human respiratory processes and environmental airflow

as well as for a deeper understanding of the mechanisms of respiratory disease transmission.

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references

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