Pulsatile Flow Patterns in Distensible Tubes
نویسندگان
چکیده
منابع مشابه
Pulsatile flow patterns in distensible tubes.
• During the last fifty years a number of physical theories have been proposed in an attempt to describe analytically the behavior of pulsatile flow in the mammalian arterial system. In order to make such an approach to a system of nonuniform, viscoelastic vessels containing a non-Newtonian fluid at all possible, it becomes necessary to introduce simplifying assumptions, the judicious selection...
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• The problems of characterizing pulsatile patterns of pressure and flow in the arterial system are intriguing and complex. Ejection of blood from the left ventricle initiates nonlinear transients in pressure and flow at the root of the aorta. These transients initiate complex pulse patterns that are propagated throughout the arterial tree. Some of the factors that must be reckoned with in an a...
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• Although much has been written about the origins and transmission of heart sounds and murmurs, little is known regarding the generation of vibrations by disturbances of flow in liquids or the mechanisms by which vibrations in flowing liquids are coupled into surrounding distensible walls. Eddy formation and turbulence are generalry regarded as the sources of cardiovascular sounds. The possibl...
متن کاملComparing Poiseuille with 1D Navier-Stokes Flow in Rigid and Distensible Tubes and Networks
A comparison is made between the Hagen-Poiseuille flow in rigid tubes and networks on one side and the time-independent one-dimensional Navier-Stokes flow in elastic tubes and networks on the other. Analytical relations, a Poiseuille network flow model and two finite element Navier-Stokes one-dimensional flow models have been developed and used in this investigation. The comparison highlights t...
متن کاملPulsatile Flow in Circular Tubes of Varying Cross-section with Suction/injection
We consider here pulsatile flow in circular tubes of varying cross-section with permeable walls. The fluid exchange across the wall is accounted for by prescribing the normal velocity of the fluid at the wall. A perturbation analysis has been carried out for low Reynolds number flows and for small amplitudes of oscillation. It has been observed that the magnitude of the wall shear stress and th...
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ژورنال
عنوان ژورنال: Circulation Research
سال: 1966
ISSN: 0009-7330,1524-4571
DOI: 10.1161/01.res.18.4.447