Chaotic oscillations in collapsible vessels

Author

Drzewiecki, Drs ; Krawciw, Natalia

Author_Institution

Dept. of Biomed. Eng., Rutgers Univ., Piscataway, NJ, USA

fYear

1990

fDate

26-27 Mar 1990

Firstpage

56

Lastpage

57

Abstract

A flexible vessel subjected to external pressure has been shown to develop self-excitable oscillations in flow and pressure. The dynamics of the oscillations is studied as the outcome of a nonlinear system. It is shown that the variation in downstream flow resistance leads from stable steady flow to oscillations that bifurcate and result in random fluctuations. It is proposed that this is evidence of chaos rather than purely random oscillations in flow (turbulence). Further evidence is provided in the form of phase plots that support the case of limit cycle oscillations. The apparently random fluctuations have a form that is not easily discerned from time waveforms

Keywords

chaos; haemodynamics; bifurcation; chaotic oscillations; collapsible vessels; flexible vessel; limit cycle oscillations; nonlinear system; phase plots; random fluctuations; self-excitable oscillations; time waveforms; turbulence; Arteries; Blood vessels; Chaos; Fluctuations; Frequency; Heart; Immune system; Limit-cycles; Muscles; Myocardium;

fLanguage

English

Publisher

ieee

Conference_Titel

Bioengineering Conference, 1990., Proceedings of the 1990 Sixteenth Annual Northeast

Conference_Location

State College, PA

Type

conf

DOI

10.1109/NEBC.1990.66287

Filename

66287