THE ASSIGNMENT OF VELOCITY PROFILES IN FINITE-ELEMENT SIMULATIONS OF PULSATILE FLOW IN ARTERIES

Citation
A. Redaelli et al., THE ASSIGNMENT OF VELOCITY PROFILES IN FINITE-ELEMENT SIMULATIONS OF PULSATILE FLOW IN ARTERIES, Computers in biology and medicine, 27(3), 1997, pp. 233-247
Citations number
22
Categorie Soggetti
Mathematical Methods, Biology & Medicine","Engineering, Biomedical","Computer Science Interdisciplinary Applications
ISSN journal
00104825
Volume
27
Issue
3
Year of publication
1997
Pages
233 - 247
Database
ISI
SICI code
0010-4825(1997)27:3<233:TAOVPI>2.0.ZU;2-N
Abstract
In this paper we present a new method for the assignment of pulsatile velocity profiles as input boundary conditions in finite element model s of arteries. The method is based on the implementation of the analyt ical solution for developed pulsatile flow in a rigid straight tube. T he analytical solution provides the fluid dynamics of the region upstr eam from the fluid domain to be investigated by means of the finite el ement approach. In standard fluid dynamics finite element applications , the inlet developed velocity profiles are achieved assuming velocity boundary conditions to be easily implementable-such as flat or parabo lic velocity profiles-applied to a straight tube of appropriate length . The tube is attached to the inflow section of the original fluid dom ain so that the flow can develop fully. The comparison between the ana lytical solution and the traditional numerical approach indicates that the analytical solution has some advantages over the numerical one. M oreover, the results suggest that subroutine employment allows a consi stent reduction in solving time especially for complex fluid dynamic m odel, and significantly decreases the storage and memory requirements for computations. (C) 1997 Elsevier Science Ltd.