Study of flow characteristics of human airways using Fluid-Structure Interaction (FSI) analysis is very important in the context of prognosis, diagnostic and treatment of respiratory diseases. The present study is focused on effect of elasticity on the respiratory wall during inhalation. Airflow in Computed Tomography (CT) scan model with rigid and compliant airway walls is studied. FSI technique is used to simulate the airflow in the model. The comparison for the two different respiratory models (rigid and compliant) shows that FSI technique brings out more realistic results as compared to Computational Fluid Dynamics (CFD) analysis. It is found that respiratory wall elasticity affects the different flow parameters (pressure, wall shear stress, etc.) at different location of the model. Wall shear stress (WSS) and airway pressure were decreased due to flexibility effect of the airway wall. This will help medical practitioners to correlate the clinical assessment with this FSI results.

在呼吸疾病的预后，诊断和治疗中，使用流固耦合（FSI）分析研究人类呼吸道的流动特性非常重要。本研究集中于吸入过程中弹性对呼吸道壁的影响。研究了具有刚性和顺应性气道壁的计算机断层扫描（CT）扫描模型中的气流。FSI技术用于模拟模型中的气流。两种不同的呼吸模型（刚性和顺应性）的比较表明，与计算流体动力学（CFD）分析相比，FSI技术带来了更为实际的结果。发现在模型的不同位置，呼吸壁弹性会影响不同的流动参数（压力，壁切应力等）。由于气道壁的柔韧性效应，壁切应力（WSS）和气道压力降低。这将帮助医生将临床评估与此FSI结果相关联。