Topical Problems of Fluid Mechanics


Institute of Thermomechanics AS CR, v.v.i.	CTU in Prague Faculty of Mech. Engineering Dept. Tech. Mathematics	MIO Université du Sud Toulon Var - AMU - CNRS - IRD	Czech Pilot centre ERCOFTAC

Simulation of Compliance in a Human Carotid Artery with Resistance Boundary Conditions
Richter K., Probst T., Hundertmark A.
Abstract:
The subject of this study is to model the physiologically realistic volumetric compliance of a human carotid artery within a fluid-structure-interaction (FSI) simulation. Computed Tomography Angiography (CTA) scans of a patient’s carotid artery are used to create a virtual twin geometry of a computational domain for fluid volume and vascular tissue. In vitro silicon replicas are used to validate the stress-strain relationship of the material used and to validate the simulation with laboratory compliance tests. Subsequently, a strain-dependent Young’s modulus is embedded in a high-fidelity vessel simulation to adapt the linear elasticity model to the measured vessel inflation. Resistance outlet boundary conditions are derived in the FSI context and are applied to model the physiological flow and pressure waves. As a result of this study, the natural mechanics of arteries during the cardiac cycle, the Windkessel effect, is observed.
Keywords:
artery compliance, fluid-structure interaction, linear elasticity, resistance boundary conditions, Windkessel effect

Fulltext: PDF DOI: https://doi.org/10.14311/TPFM.2025.027

In Proceedings Topical Problems of Fluid Mechanics 2025, Prague, 2025, Edited by David Šimurda and Tomáš Bodnár, pp. 201 ISBN 978-80-87012-05-5 (Print) ISSN 2336-5781 (Print)