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Speeding Up Fluid-Structure Interaction Simulation of the Blood Flow in a Flexible Artery Using Sub-Cycling: Stability and Accuracy

[+] Author Affiliations
L. Taelman, J. Degroote, J. Vierendeels, P. Segers

Ghent University, Ghent, Belgium

Paper No. SBC2013-14264, pp. V01AT13A008; 2 pages
doi:10.1115/SBC2013-14264
From:
  • ASME 2013 Summer Bioengineering Conference
  • Volume 1A: Abdominal Aortic Aneurysms; Active and Reactive Soft Matter; Atherosclerosis; BioFluid Mechanics; Education; Biotransport Phenomena; Bone, Joint and Spine Mechanics; Brain Injury; Cardiac Mechanics; Cardiovascular Devices, Fluids and Imaging; Cartilage and Disc Mechanics; Cell and Tissue Engineering; Cerebral Aneurysms; Computational Biofluid Dynamics; Device Design, Human Dynamics, and Rehabilitation; Drug Delivery and Disease Treatment; Engineered Cellular Environments
  • Sunriver, Oregon, USA, June 26–29, 2013
  • Conference Sponsors: Bioengineering Division
  • ISBN: 978-0-7918-5560-7
  • Copyright © 2013 by ASME

abstract

In the cardiovascular system, the distensibility of the blood vessels is the driving mechanism of wave propagation. As the blood flow interacts mechanically with the flexible vessel walls, this phenomenon gives rise to complex fluid-structure interaction (FSI) problems. Several studies comparing rigid wall with FSI simulations in settings with large deformations demonstrate the importance of including the flexible wall modeling, in particular with respect to the simulation of wall shear stress. As both the equations governing the flow and the arterial deformation (and their interaction) need to be solved, FSI simulations are characterized by a high computational cost. To make them applicable to a broader range of cardiovascular problems, efforts to reduce the calculation time (such as the use of so-called ‘sub-cycling’) should be made.

Copyright © 2013 by ASME

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