Journal ArticleDOI
Outflow boundary conditions for three-dimensional simulations of non-periodic blood flow and pressure fields in deformable arteries
Irene E. Vignon-Clementel,C. A. Figueroa,Alison L. Marsden,Jeffrey A. Feinstein,Kenneth E. Jansen,Charles A. Taylor +5 more
TLDR
This work presents an approach for prescribing lumped parameter outflow boundary conditions that accommodate transient phenomena and has applied this method to compute hemodynamic quantities in different physiologically relevant cardiovascular models to study non-periodic flow phenomena often observed in normal subjects and in patients with acquired or congenital cardiovascular disease.About:
This article is published in Journal of Biomechanics.The article was published on 2006-01-01. It has received 34 citations till now. The article focuses on the topics: Outflow boundary.read more
Citations
More filters
Journal ArticleDOI
Patient-Specific Modeling of Blood Flow and Pressure in Human Coronary Arteries
Hyung J. Kim,Irene E. Vignon-Clementel,Jessica S. Coogan,C. A. Figueroa,Kenneth E. Jansen,Charles A. Taylor +5 more
TL;DR: A method that predicts coronary flow and pressure of three-dimensional epicardial coronary arteries by considering models of the heart and arterial system and the interactions between the two models was developed.
Journal ArticleDOI
Quantification of Hemodynamics in Abdominal Aortic Aneurysms During Rest and Exercise Using Magnetic Resonance Imaging and Computational Fluid Dynamics
Andrea S. Les,Shawn C. Shadden,C. Alberto Figueroa,Jinha M. Park,Maureen M. Tedesco,Robert J. Herfkens,Ronald L. Dalman,Charles A. Taylor +7 more
TL;DR: It is hypothesized that exercise may slow AAA growth by decreasing inflammatory burden, peripheral resistance, and adverse hemodynamic conditions such as low, oscillatory shear stress and the increased MWSS, decreased OSI, and moderate turbulence present during exercise may attenuate AAA growth.
Journal ArticleDOI
A comparison of outlet boundary treatments for prevention of backflow divergence with relevance to blood flow simulations
Mahdi Esmaily Moghadam,Yuri Bazilevs,Tain-Yen Hsia,Irene E. Vignon-Clementel,Alison L. Marsden +4 more
TL;DR: In this paper, the authors quantitatively compare three available methods for treatment of outlets to prevent backflow divergence in finite element Navier-Stokes solvers, including adding a stabilization term to the boundary nodes formulation, constraining the velocity to be normal to the outlet, and using Lagrange multipliers to constrain the velocity profile at all or some of the outlets.
Journal ArticleDOI
A modular numerical method for implicit 0D/3D coupling in cardiovascular finite element simulations
TL;DR: The necessary formulation for coupling an arbitrary LPN to a finite element Navier-Stokes solver is presented, and implicit, semi-implicit, and explicit quasi-Newton formulations are compared.
Journal ArticleDOI
Augmented Lagrangian method for constraining the shape of velocity profiles at outlet boundaries for three-dimensional finite element simulations of blood flow
TL;DR: In this paper, the shape of the velocity profile at the interface between the upstream computational domain and the downstream analytic domain is added to the Coupled Multidomain Method in order to implicitly couple the computational domain with downstream analytic models.
References
More filters
Book
McDonald's Blood Flow in Arteries: Theoretical, Experimental and Clinical Principles
TL;DR: The nature and flow of a fluid properties of the normanl arterial wall changes to properties of that wall pulsatile pressure flow relationships measuring principles of arterial waves ultrasonic techniques and measurements contour of pressure and flow waves in arteries wave reflection are studied.
Journal ArticleDOI
Numerical simulation and experimental validation of blood flow in arteries with structured-tree outflow conditions.
TL;DR: Comparison between the simulations and magnetic resonance measurements in the ascending aorta and nine peripheral locations in one individual shows excellent agreement between the two.
Journal ArticleDOI
Analog studies of the human systemic arterial tree.
TL;DR: The performance of this electrical model is compared extensively to its real counterpart in the following areas: magnitude and phase of input impedances, wave travel along the aorta, and wave shapes of pressures and flows at different locations.
Journal ArticleDOI
Outflow boundary conditions for three-dimensional finite element modeling of blood flow and pressure in arteries
TL;DR: Outflow boundary conditions are derived for any downstream domain where an explicit relationship of pressure as a function of flow rate or velocities can be obtained at the coupling interface.
Journal ArticleDOI
On the coupling of 3D and 1D Navier-Stokes equations for flow problems in compliant vessels
TL;DR: In this article, the authors propose an approach to couple the original 3D equations with a convenient 1D model for the analysis of flows in compliant vessels, which allows for a dramatic reduction of the computational complexity and is suitable for ''absorbing» outgoing pressure waves.