Abstract
In this paper we perform a Newtonian and a non-Newtonian blood flow analysis for a patient-specific portal vein (PV), which was digitized from a CT image. The non-linear relationship between the shear stress and shear rate was simulated using a Carreau model. We found that, under normal physiological conditions, the computed data from the non-Newtonian model was only marginally different from that of the Newtonian model. However, when the portal flow was severely reduced (e.g., 10% of its normal value), the difference between the two models was significant. Hence we suggest that the Newtonian model is a good approximation for portal flow in physiological conditions whereas a non-Newtonian model should be used in pathological conditions when the very low flow rate induces a much higher blood viscosity.
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Ho, H., Bartlett, A., Hunter, P. (2012). Non-newtonian Blood Flow Analysis for the Portal Vein Based on a CT Image. In: Yoshida, H., Hawkes, D., Vannier, M.W. (eds) Abdominal Imaging. Computational and Clinical Applications. ABD-MICCAI 2012. Lecture Notes in Computer Science, vol 7601. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-33612-6_30
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DOI: https://doi.org/10.1007/978-3-642-33612-6_30
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-33611-9
Online ISBN: 978-3-642-33612-6
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