Partitioned fluid-solid coupling for cardiovascular blood flow: left-ventricular fluid mechanics.
Ann Biomed Eng
; 38(4): 1426-41, 2010 Apr.
Article
en En
| MEDLINE
| ID: mdl-20058187
ABSTRACT
We present a 3D code-coupling approach which has been specialized towards cardiovascular blood flow. For the first time, the prescribed geometry movement of the cardiovascular flow model KaHMo (Karlsruhe Heart Model) has been replaced by a myocardial composite model. Deformation is driven by fluid forces and myocardial response, i.e., both its contractile and constitutive behavior. Whereas the arbitrary Lagrangian-Eulerian formulation (ALE) of the Navier-Stokes equations is discretized by finite volumes (FVM), the solid mechanical finite elasticity equations are discretized by a finite element (FEM) approach. Taking advantage of specialized numerical solution strategies for non-matching fluid and solid domain meshes, an iterative data-exchange guarantees the interface equilibrium of the underlying governing equations. The focus of this work is on left-ventricular fluid-structure interaction based on patient-specific magnetic resonance imaging datasets. Multi-physical phenomena are described by temporal visualization and characteristic FSI numbers. The results gained show flow patterns that are in good agreement with previous observations. A deeper understanding of cavity deformation, blood flow, and their vital interaction can help to improve surgical treatment and clinical therapy planning.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Velocidad del Flujo Sanguíneo
/
Función Ventricular
/
Circulación Coronaria
/
Modelos Cardiovasculares
Tipo de estudio:
Prognostic_studies
Límite:
Humans
Idioma:
En
Revista:
Ann Biomed Eng
Año:
2010
Tipo del documento:
Article
País de afiliación:
Alemania