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Several results from numerical investigation of nonlinear waves connected to blood flow in an elastic tube of variable radius

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arxiv 1509.08600 v1 pith:JDVDX3N6 submitted 2015-09-29 physics.flu-dyn nlin.PS

classification physics.flu-dynnlin.PS
keywords wavebloodflownonlineartubewavesconnectedelastic
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We investigate flow of incompressible fluid in a cylindrical tube with elastic walls. The radius of the tube may change along its length. The discussed problem is connected to the blood flow in large human arteries and especially to nonlinear wave propagation due to the pulsations of the heart. The long-wave approximation for modeling of waves in blood is applied. The obtained model Korteweg-deVries equation possessing a variable coefficient is reduced to a nonlinear dynamical system of 3 first order differential equations. The low probability of arising of a solitary wave is shown. Periodic wave solutions of the model system of equations are studied and it is shown that the waves that are consequence of the irregular heart pulsations may be modeled by a sequence of parts of such periodic wave solutions.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. The Simple Equations Method (SEsM) and the use of exponential functions for obtaining simple and multisoliton solutions of some nonlinear partial differential equations

    nlin.SI 2019-09 conditional novelty 3.0 of 10

    A generalized ansatz method (SEsM) is shown to reproduce Hirota's KdV multisoliton solutions and to yield an exact solution of a nonintegrable fifth-order KdV-type equation.

  2. Simple equations method (SEsM) and some of its numerous particular cases

    nlin.SI 2019-08 conditional novelty 2.0 of 10

    The Simple Equations Method is a broad ansatz framework, and several established solution methods are shown to be particular cases, but the result is nearly tautological.

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