Noninvasive Fluid Dynamic Power Loss Assessments for Total Cavopulmonary Connections Using the Viscous Dissipation Function: A Feasibility Study

[+] Author and Article Information
Timothy M. Healy, Ajit P. Yoganathan

Georgia Tech/Emory University, Department of Biomedical Engineering, Atlanta, GA 30332

Carol Lucas

Biomedical Engineering Department, University of North Carolina, Chapel Hill, NC 27599

J Biomech Eng 123(4), 317-324 (Feb 08, 2001) (8 pages) doi:10.1115/1.1384875 History: Received March 07, 2000; Revised February 08, 2001
Copyright © 2001 by ASME
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Schematic showing reconstructed circulation resulting from total cavopulmonary connection surgery. The dashed box highlights the reconstructed region. Abbreviations are RA=right atrium, LA=left atrium, Ao=aorta,IVC=inferior vena cava,SVC=superior vena cava,LPA=left pulmonary artery, RPA=right pulmonary artery.
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Coarse mesh discretization for circular tube model
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Solid model representations of T-bifurcation models: (a) sharp bifurcation model, (b) filleted bifurcation model
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Computational mesh used to compute pressure and velocity in the full TCPC model; the mesh consists of 76,388 nodes.
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Comparison of experimental and computational dimensionless streamwise velocity profiles. Profiles at six stations on the symmetry plane of the duct are shown: (a) θ=4.6 deg, (b) θ=11.7 deg, (c) θ=23.4 deg, (d) θ=39.8 deg, (e) θ=58.5 deg, (f ) θ=81.9 deg.
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Plot comparing traditional control volume technique to dissipation function estimates of power loss in the full TCPC model. For reference, mean power losses reported by Sharma et al. 5 are also shown. Error bars depict 95 percent confidence limits in the reported means.




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