Multi-scale computational model of three-dimensional hemodynamics within a deformable full-body arterial network

JOURNAL OF COMPUTATIONAL PHYSICS

卷:244

Article

Xiao, Nan^1,3  Humphrey, Jay D.²  Figueroa, C. Alberto³ 

[1] Stanford Univ, Dept Bioengn, Stanford, CA 94305 USA

[2] Yale Univ, Dept Biomed Engn, New Haven, CT 06520 USA

[3] Kings Coll London, Dept Biomed Engn, London SE1 7EH, England

关键词: Hemodynamics;    Wave propagation;    Pulse wave velocity;    Fluid-structure interaction;    Multiscale modeling;    Hypertension;    Arterial stiffening;    Full-body arterial model;   

DOI  :  10.1016/j.jcp.2012.09.016

来源: Elsevier

【 摘 要 】

In this article, we present a computational multi-scale model of fully three-dimensional and unsteady hemodynamics within the primary large arteries in the human. Computed tomography image data from two different patients were used to reconstruct a nearly complete network of the major arteries from head to foot. A linearized coupled-momentum method for fluid-structure-interaction was used to describe vessel wall deformability and a multi-domain method for outflow boundary condition specification was used to account for the distal circulation. We demonstrated that physiologically realistic results can be obtained from the model by comparing simulated quantities such as regional blood flow, pressure and flow waveforms, and pulse wave velocities to known values in the literature. We also simulated the impact of age-related arterial stiffening on wave propagation phenomena by progressively increasing the stiffness of the central arteries and found that the predicted effects on pressure amplification and pulse wave velocity are in agreement with findings in the clinical literature. This work demonstrates the feasibility of three-dimensional techniques for simulating hemodynamics in a full-body compliant arterial network. (c) 2012 Elsevier Inc. All rights reserved.

【 授权许可】

Free