Title: Numerical comparison of laminar flow and turbulence models of hemodynamics based on pulmonary artery stenosis

Authors: Fan He; Xinyu Wang; Lu Hua; Tingting Guo

Addresses: School of Science, Beijing University of Civil Engineering and Architecture, Beijing, 100044, China ' School of Science, Beijing University of Civil Engineering and Architecture, Beijing, 100044, China ' Thrombosis Center, Fuwai Hospital, Beijing, 100037, China; National Clinical Research Center for Cardiovascular Diseases, State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100037, China ' Thrombosis Center, Fuwai Hospital, Beijing, 100037, China; National Clinical Research Center for Cardiovascular Diseases, State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100037, China

Abstract: Pulmonary artery stenosis is closely related to hemodynamics. In this paper, the laminar and turbulent flows in the same three-dimensional model of pulmonary artery stenosis are numerically calculated by using fluid-structure interaction, and the obtained maximum velocity, pressure and wall shear stress are compared and analysed. The numerical results show that the hemodynamic parameters of laminar flow model are slightly higher than those of k-ε turbulence model. Specially, the wall shear stress at both ends of stenosis is more sensitive to laminar flow model. This study provides the effects of laminar flow and k-ε turbulence on pulmonary artery hemodynamics. It gives a basis for the follow-up realistic hemodynamic numerical simulation of pulmonary artery model and has a guiding significance for clinical diagnosis and treatment, and promotes the development of the combination of mechanics and medicine.

Keywords: pulmonary artery; stenosis; hemodynamics; laminar flow; turbulence.

DOI: 10.1504/PCFD.2023.134209

Progress in Computational Fluid Dynamics, An International Journal, 2023 Vol.23 No.5, pp.317 - 325

Received: 31 Dec 2021
Received in revised form: 21 Aug 2022
Accepted: 21 Aug 2022
Published online: 13 Oct 2023 *

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