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首页> 外文会议>International symposium on IT in medicine and education >Chapter 59 Computational Fluid Dynamics Simulation of Air Flow in the Human Symmetrical Six-Generation Bifurcation Bronchial Tree Model
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Chapter 59 Computational Fluid Dynamics Simulation of Air Flow in the Human Symmetrical Six-Generation Bifurcation Bronchial Tree Model

机译：第59章人对称六代分岔支气管树模型空气流量的计算流体动力学模拟

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The present study aims to reveal the velocity and pressure distributions of air flow in the human symmetrical six-generation bifurcation bronchial tree model, to determine the influences of homothetic ratio, the angle of branching, and the branching plane rotation angle on the air flow. The 3D bronchial tree model is built up using SolidWorks based on optimal parameters from the references at first. And then it is transferred into ANSYS, one computational fluid dynamics software, to simulate the air flow and get the velocity and pressure distributions. Similarly, three different models are established by varying homothetic ratio, the angle of branching, and the branching plane rotation angle. Their impacts on the air flow are clarified through comparing the results. It is found the velocity and pressure distributions are symmetical genrally, but they start uneven from the fourth generation bronchus. The velocities in the inner and inferior bronchi are smaller than in the outer and superior ones. The pressure drop will decrease with the homothetic ratio, but it also increases the tree volume. The variations of the branching angle and the branching plane rotation angle will increase the pressure drop. The simulation results can reveal the air flow patterns in the models, and work as the benchmark for the future ventilation assessment of realistic human lung.
机译：本研究旨在揭示人对称六代分岔支气管树模型中空气流速的速度和压力分布，以确定同性比值，分支角度的影响，以及空气流量上的分支平面旋转角度。 3D支气管树模型是根据首先从参考的最佳参数使用SolidWorks建立的。然后将其转移到ANSYS，一个计算流体动力学软件中，以模拟空气流并获得速度和压力分布。类似地，通过不同的均匀比，分支角度和分支平面旋转角度建立三种不同的模型。通过比较结果，阐明了它们对空气流的影响。发现速度和压力分布是对称的衔接，但它们从第四代支气管开始不均匀。内部和下支气管中的速度小于外部和上部的速度。压降将随着均匀的比例而降低，但也增加了树木体积。分支角度和分支平面旋转角度的变化将增加压降。仿真结果可以揭示模型中的空气流动模式，并作为现实人肺的未来通风评估的基准。

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