Abstract
We present a computational procedure and results for modeling of blood flow within the ascending human aorta, including all arterial branches and coronary arteries. We assume pulsatile blood flow and deformable walls. A 3D fluid domain is considered. The Arbitrary-Lagrangian-Eulerian (ALE) formulation and the implicit computational algorithm [1] for laminar viscous incompressible fluid flow is used. The blood walls are modeled by shell finite elements [2,3]- We introduce an orthotropic nonlinear material model, represented by a family of stress-stretch curves, to model the wall material behavior. The model is an extension of a uniaxial model [4]. We propose a computational procedure for the stress calculation for this material model. A loose coupling algorithm is used in solving the sohd-fluid interaction [5]. The described computational procedures are implemented in our FE program PAK [6].
Original language | English (US) |
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Title of host publication | Computational Fluid and Solid Mechanics 2003 |
Publisher | Elsevier |
Pages | 1751-1754 |
Number of pages | 4 |
ISBN (Print) | 9780080529479, 9780080440460 |
DOIs | |
State | Published - Jun 2 2003 |
Keywords
- Blood flow
- Human aorta
- Orthotropic nonhnear material
- REM
- Solid-fluid interaction
ASJC Scopus subject areas
- Engineering(all)