Fluid friction and wall viscosity of the 1D blood flow model

• Published in: Journal of biomechanics Vol. 49; no. 4; pp. 565 - 571
• Main Authors: Wang, Xiao-Fei, Nishi, Shohei, Matsukawa, Mami, Ghigo, Arthur, Lagrée, Pierre-Yves, Fullana, Jose-Maria
• Format: Journal Article
• Language: English
• Published: United States Elsevier Ltd 29.02.2016; Elsevier Limited; Elsevier
• Subjects: Biomechanics; Blood Circulation; Blood flow; Computational fluid dynamics; Damping; Design engineering; Elasticity; Experiments; Fluid flow; Fluid friction; Friction; Hemodynamics; Hydrodynamics; Mathematical models; Mechanics; Models, Biological; Nonlinear Dynamics; One-dimensional modeling; Physical Medicine and Rehabilitation; Physics; Physiology; Pressure; Pulse wave propagation; Studies; Tubes; Velocity; Viscoelasticity; Viscosity; Water; Viscoelasticity; Pulse wave propagation; Fluid friction; One-dimensional modeling
• ISSN: 0021-9290; 1873-2380
• DOI: 10.1016/j.jbiomech.2016.01.010

Abstract We study the behavior of the pulse waves of water into a flexible tube for application to blood flow simulations. In pulse waves both fluid friction and wall viscosity are damping factors, and difficult to evaluate separately. In this paper, the coefficients of fluid friction and wall viscosity are estimated by fitting a nonlinear 1D flow model to experimental data. In the experimental setup, a distensible tube is connected to a piston pump at one end and closed at another end. The pressure and wall displacements are measured simultaneously. A good agreement between model predictions and experiments was achieved. For amplitude decrease, the effect of wall viscosity on the pulse wave has been shown as important as that of fluid viscosity.