نتایج جستجو برای: pulsatile blood flow
تعداد نتایج: 1092055 فیلتر نتایج به سال:
Pulsatile non-Newtonian blood flow in an idealized vessel is numerically investigated. The CarreauYasuda model is used to account for the shear-thinning viscosity of blood. For validation purposes, we have used two numerical methods: a mesoscopic lattice-Boltzmann equation and a standard finite element solver. Good agreement for the velocity and the shear stress has been obtained from the two a...
We present numerical analysis of the lateral movement a deformable spherical capsule in pulsatile channel flow, with Newtonian fluid almost inertialess condition and at small confinement ratio $a_0/R = 0.4$, where $R$ $a$ are radius. find that speed axial migration can be accelerated by flow pulsation specific frequency. The increases oscillatory amplitude, while most effective frequency remain...
A three-dimensional computer model of human aortic arch with three branches is reproduced to study the pulsatile blood flow with Finite Element Method. In specific, the focus is on variation of wall shear stress, which plays an important role in the localization and development of atherosclerotic plaques. Pulsatile pressure pulse is used as boundary condition to avoid flow entry development, an...
OBJECTIVE Fixed pulmonary hypertension is a contraindication for cardiac transplantation because of the increased risk of donor heart failure. We sought to determine whether left ventricular assist devices improve fixed pulmonary hypertension in cardiac transplant candidates to enable safe cardiac transplantation. METHODS Thirty-five consecutive cardiac transplant candidates (age 56 +/- 6 yea...
Hypertension, decreased cerebral blood flow, and diminished cerebral blood flow velocity regulation, are among the first signs indicating the presence of cerebral vascular disease. In this paper, we will present a mathematical model that can predict blood flow and pressure during posture change from sitting to standing. The mathematical model uses a compartmental approach to describe pulsatile ...
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