Title :
Chaotic oscillations in collapsible vessels
Author :
Drzewiecki, Drs ; Krawciw, Natalia
Author_Institution :
Dept. of Biomed. Eng., Rutgers Univ., Piscataway, NJ, USA
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;
Conference_Titel :
Bioengineering Conference, 1990., Proceedings of the 1990 Sixteenth Annual Northeast
Conference_Location :
State College, PA
DOI :
10.1109/NEBC.1990.66287
