Abstract
In our respiratory system, trachea–bronchi geometry is very complex in nature, which gives rise to the intricate airflow patterns. Since along with air, many other pollutants and dust particles go inside our respiratory system resulting in various lung problems like asthma, bronchiole inflammation, chronic bronchitis, and other infectious diseases like influenza and pneumonia. Thus, it is essential to understand fluid flow patterns, related stresses, and their effects inside the human airways. In most of the research till now, the role of the elasticity of the walls of human airways is neglected due to the computational difficulties. Here, we performed a two-way coupled fluid–structure interaction analysis on a double bifurcation geometry (G3 to G5) using finite volume approach for Re = 500 and Re = 2000, keeping the mass flow rate constant. The solid walls of human airways are considered to be of isotropic material. With including the elasticity, we were able to predict the more physical values of the stresses. We observed that maximum deformation in the geometry occurs at first bifurcation for low Reynolds number and the branch G5M for high Reynolds number. High values of Von-Mises stress are also observed at the point of bifurcations.
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Acknowledgements
The authors would like to acknowledge the High-Performance Computing (HPC) Facility at IIT Kanpur (www.iitk.ac.in/cc) for providing the necessary environment to perform the above study.
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Verma, M., Karmanya, Verma, A., De, A. (2021). Coupled Fluid–Structure Study of Inspiratory Flow Through Human Airways with Double Bifurcation. In: Venkatakrishnan, L., Majumdar, S., Subramanian, G., Bhat, G.S., Dasgupta, R., Arakeri, J. (eds) Proceedings of 16th Asian Congress of Fluid Mechanics. Lecture Notes in Mechanical Engineering. Springer, Singapore. https://doi.org/10.1007/978-981-15-5183-3_10
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DOI: https://doi.org/10.1007/978-981-15-5183-3_10
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