Single-Step Stereolithography of Complex Anatomical Models for Optical Flow Measurements

[+] Author and Article Information
Diane de Zélicourt, Kerem Pekkan, Hiroumi Kitajima, David Frakes, Ajit P. Yoganathan

Cardiovascular Fluid Mechanics Laboratory, Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology & Emory University School of Medicine, Room 2119 U.A. Whitaker Building, 313 Ferst Dr., Atlanta, GA 30332-0535

J Biomech Eng 127(1), 204-207 (Mar 08, 2005) (4 pages) doi:10.1115/1.1835367 History: Received April 24, 2004; Revised September 13, 2004; Online March 08, 2005
Copyright © 2005 by ASME
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Left: Unstructured computational fluid dynamics grid of the anatomic solid model, the total cavopulmonary connection (TCPC). Right: The corresponding stereolithographic duplicate for DPIV experiments, in two halves. Top-left-corner: Simple idealized planar glass model studied by Ensley et al. 8.
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Model orientation in the SLA machine as the anterior half is being manufactured and recommendations for experimental planning
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PIV was performed using a TSI (TSI Inc, Shoreview, MN) system. To ensure minimum image distortion, the outer surfaces facing the camera and the laser are flat and orthogonal to the acquisition and the laser beam axis, respectively. Seeding the flow with fluorescent particles while cutting off laser light reflections with a color filter further improves PIV quality.
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Assessment of the flow field using flow visualization (left), PIV (middle), and CFD (right) at 1 L/min; inflow split: 60/40 IVC/SVC; outflow split: 30/70 left/right lung. Flow visualization dye is injected from the SVC. Height (h) is measured from model anterior. The CFD simulations were run under the same conditions and assumptions as the experimental setup, namely incompressible, laminar flow with steady inflow conditions, and rigid, but smooth vessel walls.




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