Pulsatile Bypass Flow by Means of Power Law and Newtonian Model: A Comparison Guided by Numerical Investigation

Andrea Natale Impiombato; Francesco Orlandi; Giorgio La Civita; Flavia Schwarz Franceschini Zinani; Luiz Alberto Oliveira Rocha; Cesare Biserni; Eugenia Rossi di Schio

doi:10.4028/p-1hzt14

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Pulsatile Bypass Flow by Means of Power Law and Newtonian Model: A Comparison Guided by Numerical Investigation

Abstract:

In this work, the comparison between the Newtonian and the Power Law models was pointed out to determine the flow field within a system that includes the bypass of a narrowing zone (Stenosis) of an ideal artery. The simulations were conducted in a transient regime considering the pulsed effect inside the veins. The results show that the Power Law model does not sufficiently coincide with the Newtonian model, especially for describing the wall stresses. More specifically, the Power Law model predicts a velocity profile that remains parabolic for the entire time range analyzed, while the Newtonian model captures vorticities.

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Periodical:

Defect and Diffusion Forum (Volume 420)

Pages:

215-228

DOI:

https://doi.org/10.4028/p-1hzt14

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Online since:

November 2022

Authors:

Andrea Natale Impiombato, Francesco Orlandi, Giorgio La Civita, Flavia Schwarz Franceschini Zinani, Luiz Alberto Oliveira Rocha, Cesare Biserni*, Eugenia Rossi di Schio

Keywords:

Constructal Design, Coronary Artery Bypass, Newtonian Model, Power Law Model, Pulsatile Flow

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