相关实验视频
Updated: Jun 26, 2025

09:39
A Microfluidic Model of Biomimetically Breathing Pulmonary Acinar Airways
Published on: May 9, 2016
8.0K
一个近乎现实的计算模型开发和流域研究的人类上部和中部气道
Mohammad Reza Rezazadeh1, Alireza Dastan2, Sasan Sadrizadeh3,4
1School of Mechanical Engineering, Shiraz University, Shiraz, Iran.
Medical & biological engineering & computing
|May 17, 2024
概括
计算流体动力学 (CFD) 在两个人类呼吸道模型中揭示了不同的空气流模式. 了解这些气道动态对于药物输送和颗粒物暴露研究至关重要.
科学领域:
- 呼吸系统生理学 呼吸系统生理学
- 生物医学工程 生物医学工程
- 计算科学 计算科学
背景情况:
- 气道结构和流体动力学显著影响药物输送和颗粒物沉积.
- 以前的研究往往简化了呼吸道几何结构,限制了详细的空气流分析.
研究的目的:
- 在人类呼吸道的两个不同的3D模型中研究和比较空气流特征.
- 分析空气流速,速度,雷诺兹数和吸入和呼出时的压力下降的差异.
主要方法:
- 利用计算流体动力学 (CFD) 在两个3D气道模型中建模空气流.
- 模型1:对上部/中部气道 (第1-9代) 的CT扫描和尸体数据的组合扫描.
- 模型2:使用Kitaoka的算法开发了呼吸道 (Carina到第9代).
主要成果:
- 在这两种模型中,空气流速和雷诺兹数从气管到第九代呈指数级下降.
- 平均空气速度在Kitaoka模型中呈现稳步下降,但在准现实模型中在3-4代达到峰值.
- 在上部/中部气道中,流量场在高达15L/分钟的速度下保持了层状.
结论:
- CFD分析为人类呼吸道内的空气流动行为提供了宝贵的见解.
- 模型几何学的差异影响空气流动力学,影响呼吸道暴露和药物输送的预测.
相关概念视频
Typical Model Studies
356
Fluid mechanics model studies often utilize scaled-down systems to predict fluid behavior in full-scale environments, such as river flows, dam spillways, and structures interacting with open surfaces. Maintaining Froude number similarity in river models is crucial, as it replicates surface flow features like wave patterns and velocities.
356
Factors Affecting Pulmonary Ventilation
1.3K
Besides the pressure difference between the external environment and the lungs, the airflow rate and ease of pulmonary ventilation are also influenced by three other factors: surface tension of the fluid in the alveoli, compliance of the lungs, and airway resistance.
Alveolar Surface Tension
The alveolar fluid lines the luminal surface of the alveoli and exerts a force called surface tension. This force is caused by the polar water molecules in the liquid being more strongly attracted to each...
Alveolar Surface Tension
The alveolar fluid lines the luminal surface of the alveoli and exerts a force called surface tension. This force is caused by the polar water molecules in the liquid being more strongly attracted to each...
1.3K

