2-D CFD design of the cross-sectional shape of arterial stents

An approach for desigining arterial stents to maximize wall shear stress is presented. A cost equation to maximize wall shear stress is derived and then inverted into a minimization problem for the optimizer. A 2-D mixed-element finite-volume scheme for solving the compressible Navier-Stokes equations is implemented. A paramaterization of the cross- sectional shape of the stent wire using Hicks-Henne functions is described. The strategies used in the commercial optimization software, DAKOTA, to minimize the cost equation are described. The solver is validated using well known fluid flow test cases and is shown to match other published computed results for bloodflow through stented arteries. New candidate stent shapes are produced by the optimization and are evaluated based on comparison to modern commercial stent designs.

Grantor dc:publisher

University of Tennessee at Chattanooga

Author dc:creator

• Karman, Kristen

Contributors dc:contributor

• Anderson, W. Kyle
• Nichols, Stephen; Melnik, Robert
• College of Engineering and Computer Science

• Stents (Surgery)
• Stents (Surgery) -- Fluid dynamics

Licence

• https://rightsstatements.org/page/InC/1.0/?language=en

Language dc:language

English, eng

Repository record dc:identifier

https://scholar.utc.edu/theses/97

OAI identifier oai:identifier

oai:scholar.utc.edu:theses-1097