Mathematical model of spiral waves propagating in the aorta

The spiral waves in the viscous incompressible fluid flow within an arterial vessel modeled by a thin elastic isotropic shell are studied. Asymptotic expansions are constructed for two types of spiral waves. The first type is spiral long wall waves generated (owing to the viscous fluid no-slip at th...

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Published in:Fluid dynamics 2013, Vol.48 (1), p.89-96
Main Authors: Batishchev, V. A., Ustinov, Yu. A.
Format: Article
Language:English
Subjects:
Asymptotic expansions
Classical and Continuum Physics
Classical Mechanics
Computational fluid dynamics
Cross sections
Engineering Fluid Dynamics
Fluid- and Aerodynamics
Incompressible flow
Mathematical models
Physics
Physics and Astronomy
Shells
Spirals
Wave propagation
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description The spiral waves in the viscous incompressible fluid flow within an arterial vessel modeled by a thin elastic isotropic shell are studied. Asymptotic expansions are constructed for two types of spiral waves. The first type is spiral long wall waves generated (owing to the viscous fluid no-slip at the inner shell wall) by the longitudinal and twist harmonic waves that propagate along the wall. For these waves the amplitude distribution over the vessel cross-section has the form of a boundary layer localized near the inner shell surface. The second is short small-amplitude waves that practically fill the entire vessel cross-section. It is shown that for the short waves the transfer mechanismis the steady-state flow, the role of the longitudinal wall waves and the elastic characteristics of the shell being in this case insignificant.
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subjects Asymptotic expansions
Classical and Continuum Physics
Classical Mechanics
Computational fluid dynamics
Cross sections
Engineering Fluid Dynamics
Fluid- and Aerodynamics
Incompressible flow
Mathematical models
Physics
Physics and Astronomy
Shells
Spirals
Wave propagation
title Mathematical model of spiral waves propagating in the aorta
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