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.
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. - In: DIFFUSION AND DEFECT DATA, SOLID STATE DATA. PART A, DEFECT AND DIFFUSION FORUM. - ISSN 1012-0386. - ELETTRONICO. - 420:(2022), pp. 215-228. [10.4028/p-1hzt14]
Pulsatile Bypass Flow by Means of Power Law and Newtonian Model: A Comparison Guided by Numerical Investigation
Andrea Natale Impiombato;Giorgio La Civita;Cesare Biserni
;Eugenia Rossi di Schio
2022
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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
