The goal of this study is to develop a computational fluid dynamics (CFD) modeling approach to better estimate the blood flow dynamics in the bundles of the hollow fiber membrane based medical devices (i.e., blood oxygenators, artificial lungs, and hemodialyzers). Three representative types of arrays, square, diagonal, and random with the porosity value of 0.55, were studied. In addition, a 3D array with the same porosity was studied. The flow fields between the individual fibers in these arrays at selected Reynolds numbers (Re) were simulated with CFD modeling. Hemolysis is not significant in the fiber bundles but the platelet activation may be essential. For each type of array, the average wall shear stress is linearly proportional to the Re. For the same Re but different arrays, the average wall shear stress also exhibits a linear dependency on the pressure difference across arrays, while Darcy's law prescribes a power-law relationship, therefore, underestimating the shear stress level. For the same Re, the average wall shear stress of the diagonal array is approximately 3.1, 1.8, and 2.0 times larger than that of the square, random, and 3D arrays, respectively. A coefficient C is suggested to correlate the CFD predicted data with the analytical solution, and C is 1.16, 1.51, and 2.05 for the square, random, and diagonal arrays in this paper, respectively. It is worth noting that C is strongly dependent on the array geometrical properties, whereas it is weakly dependent on the flow field. Additionally, the 3D fiber bundle simulation results show that the three-dimensional effect is not negligible. Specifically, velocity and shear stress distribution can vary significantly along the fiber axial direction.
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December 2013
Research-Article
Computational Study of the Blood Flow in Three Types of 3D Hollow Fiber Membrane Bundles
Katharine H. Fraser,
Katharine H. Fraser
2
1Corresponding author.
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M. Ertan Taskin,
M. Ertan Taskin
3
2Current address: Fraser K. H., Department of Bioengineering, Imperial College London, London, UK.
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Zhongjun J. Wu
Zhongjun J. Wu
1
Artificial Organs Laboratory,
Department of Surgery,
e-mail: zwu@smail.umaryland.edu
Department of Surgery,
University of Maryland School of Medicine
Baltimore, MD 21201
e-mail: zwu@smail.umaryland.edu
3Current address: Taskin M. E., HeartWare Inc., 14000 NW 57th, Court, Miami Lakes, FL 33014
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Zhongjun J. Wu
Artificial Organs Laboratory,
Department of Surgery,
e-mail: zwu@smail.umaryland.edu
Department of Surgery,
University of Maryland School of Medicine
Baltimore, MD 21201
e-mail: zwu@smail.umaryland.edu
1Corresponding author.
2Current address: Fraser K. H., Department of Bioengineering, Imperial College London, London, UK.
3Current address: Taskin M. E., HeartWare Inc., 14000 NW 57th, Court, Miami Lakes, FL 33014
Contributed by the Bioengineering Division of ASME for publication in the JOURNAL OF BIOMECHANICAL ENGINEERING. Manuscript received January 11, 2013; final manuscript received October 10, 2013; accepted manuscript posted October 19, 2013; published online November 6, 2013. Assoc. Editor: Dalin Tang.
J Biomech Eng. Dec 2013, 135(12): 121009 (11 pages)
Published Online: November 6, 2013
Article history
Received:
January 11, 2013
Revision Received:
October 10, 2013
Accepted:
October 19, 2013
Citation
Zhang, J., Chen, X., Ding, J., Fraser, K. H., Ertan Taskin, M., Griffith, B. P., and Wu, Z. J. (November 6, 2013). "Computational Study of the Blood Flow in Three Types of 3D Hollow Fiber Membrane Bundles." ASME. J Biomech Eng. December 2013; 135(12): 121009. https://doi.org/10.1115/1.4025717
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