Title: Computational study on the effect of human respiratory wall elasticity

Authors: Vivek Kumar Srivastav; Rakesh Kumar Shukla; Akshoy Ranjan Paul; Anuj Jain

Addresses: Department of Mathematics, Motihari College of Engineering, Motihari, Bihar, India ' Department of Mechanical Engineering, Krishna Engineering College, Ghaziabad, Uttar Pradesh, India ' Department of Applied Mechanics, Motilal Nehru National Institute of Technology Allahabad, U.P., India ' Department of Applied Mechanics, Motilal Nehru National Institute of Technology Allahabad, U.P., India

Abstract: The present study computationally investigate the respiratory wall behaviour and airflow characteristics inside trachea and first generation bronchi considering fluid structure interaction (FSI) between air flow and the human respiratory wall. The deformation in the respiratory tract is found to be insignificant for the elasticity modulus above 40 kPa. A considerable amount of deformation is observed when the elasticity modulus is below 30 kPa. The flexibility considered in the respiratory tract wall decreases the maximum flow velocity by 24%. It is observed that the wall shear stress in compliant respiratory model is reduced to one-third of that in rigid respiratory model. The comparison of results of rigid and compliant models show that FSI technique offers more realistic results as compared to conventional computational fluid dynamics (CFD) analysis of rigid tract. The results will help medical practitioners to correlate the clinical findings with the more accurate computational results.

Keywords: human respiratory tract; rigid model; compliant model; fluid structure interaction; FSI; elasticity modulus.

DOI: 10.1504/IJBET.2021.117514

International Journal of Biomedical Engineering and Technology, 2021 Vol.37 No.1, pp.46 - 64

Received: 06 Sep 2017
Accepted: 27 Feb 2018
Published online: 13 Sep 2021 *

Full-text access for editors Full-text access for subscribers Purchase this article Comment on this article