Abstract
This work aims at investigating the influence of non-Newtonian blood rheology on the hemodynamics of 3D patient-specific stenotic vessels, by means of a comparison of some numerical results with the Newtonian case. In particular, we consider two carotid arteries with severe stenosis and a stenotic coronary artery treated with a bypass graft, in which we virtually vary the degree of stenosis. We perform unsteady numerical simulations based on the Finite Element method using the Carreau-Yasuda model to describe the non-Newtonian blood rheology. Our results show that velocity, vorticity and wall shear stress distributions are moderately influenced by the non-Newtonian model in case of stenotic carotid arteries. On the other hand, we observed that a non-Newtonian model seems to be important in case of stenotic coronary arteries, in particular to compute the relative residence time which is greatly affected by the rheological model.
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- 1.
We recall that the vorticity, \(\mathbf{\omega }\), is defined as \(\mathbf{\omega } = \nabla \times \mathbf{u}\).
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Guerciotti, B., Vergara, C. (2018). Computational Comparison Between Newtonian and Non-Newtonian Blood Rheologies in Stenotic Vessels. In: Wriggers, P., Lenarz, T. (eds) Biomedical Technology. Lecture Notes in Applied and Computational Mechanics, vol 84. Springer, Cham. https://doi.org/10.1007/978-3-319-59548-1_10
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DOI: https://doi.org/10.1007/978-3-319-59548-1_10
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