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人体肺部“左二右三”支气管层流和湍流模型微粒运动沉积分析比较
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Abstract:
本文采用Huang和Zhang (2011)构建的从口到第四代不对称气道的人体上呼吸道模型，利用Ansys Inc.的CFX18.0软件模拟三种典型吸入模式下“左二右三”肺部支气管中的粒子运输和沉积情况。考虑到人体肺部支气管内的复杂流动情况，本文模拟了在层流模型和不同的湍流模型下的粒子运输和沉积情况，并对不同模型下得到的结果进行了比较分析。我们的研究表明，在k-ω湍流模型下，在人体“左二右三”的肺支气管中，粒子主要沉积在隆脊处，粒子的斯托克斯数越大，粒子沉积率越高。
In this paper, we utilized the human upper airway model, which extends from the mouth to the fourth-generation asymmetric airways, as constructed by Huang and Zhang (2011). We simulated the particle transport and deposition within the bronchial tubes of the lungs under three typical inhalation modes using the ANSYS CFX 18.0 software. Considering the complex flow conditions in the bronchioles of the human lung, this paper simulates particle transport and deposition within laminar flow and various turbulence models. The results from these different models are then compared and analyzed. Our findings indicate that under the k-ω turbulence model, particles are predominantly deposited on the ridges within the “left-two-right-three” bronchioles of the human lung. Additionally, the larger the Stokes Number of the particles, the greater the deposition rate.
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