PMID: 11340874May 9, 2001Paper

Requirements for mesh resolution in 3D computational hemodynamics

Journal of Biomechanical Engineering
S Prakash, C R Ethier

Abstract

Computational techniques are widely used for studying large artery hemodynamics. Current trends favor analyzing flow in more anatomically realistic arteries. A significant obstacle to such analyses is generation of computational meshes that accurately resolve both the complex geometry and the physiologically relevant flow features. Here we examine, for a single arterial geometry, how velocity and wall shear stress patterns depend on mesh characteristics. A well-validated Navier-Stokes solver was used to simulate flow in an anatomically realistic human right coronary artery (RCA) using unstructured high-order tetrahedral finite element meshes. Velocities, wall shear stresses (WSS), and wall shear stress gradients were computed on a conventional "high-resolution" mesh series (60,000 to 160,000 velocity nodes) generated with a commercial meshing package. Similar calculations were then performed in a series of meshes generated through an adaptive mesh refinement (AMR) methodology. Mesh-independent velocity fields were not very difficult to obtain for both the conventional and adaptive mesh series. However, wall shear stress fields, and, in particular, wall shear stress gradient fields, were much more difficult to accurately resolve...Continue Reading

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Citations

Jan 4, 2006·Annals of Biomedical Engineering·David A Steinman, Charles A Taylor
Oct 27, 2007·Annals of Biomedical Engineering·Ronald A Gutierrez, Eric T Crumpler
Feb 7, 2008·Annals of Biomedical Engineering·George C EngelmayrMichael S Sacks
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