Pressure/flow relationships in collapsible tubes: effects of upstream pressure fluctuations

An experimental investigation has been made on the pressure/flow behaviour of a collapsible tube. Of particular interest are the effects of upstream pressure fluctuations on the mean pressure/flow relationships. These mean pressure/flow relationships were found to exhibit features generally similar to the steady-flow situation, including flow limitation where the flow rate becomes independent of the driving pressure during the tube-collapsed phase. However, the tube collapsed under a higher downstream pressure and the maximum flow rate was reduced, when either the frequency or amplitude of the upstream pressure fluctuations was increased.

[1]  T. Pedley.  The Fluid Mechanics of Large Blood Vessels: Flow in collapsible tubes , 1980 .

[2]  A. Shapiro.  Steady Flow in Collapsible Tubes , 1977 .

[3]  Robert H. Scanlan,et al.  Flow-Induced Vibration , 1977 .

[4]  D. J. Griffiths.  Oscillations in the outflow from a collapsible tube , 1977, Medical and Biological Engineering and Computing.

[5]  D. J. Griffiths.  Hydrodynamics of male micturition—I Theory of steady flow through elastic-walled tubes , 1971, Medical and biological engineering.

[6]  Timothy J. Pedley,et al.  A separated-flow model for collapsible-tube oscillations , 1985, Journal of Fluid Mechanics.

[7]  M. Shimizu.  Characteristics of pressure-wave propagation in a compliant tube with a fully collapsed segment , 1985, Journal of Fluid Mechanics.

[8]  D. J. Griffiths.  Hydrodynamics of male micturition—II Measurements of stream parameters and urethral elasticity , 1971, Medical and biological engineering.

[9]  K. Schlesinger.  An electrostatic image tube with planar photocathode , 1969 .

[10]  Timothy J. Pedley,et al.  Viscous flow in collapsible tubes of slowly varying elliptical cross-section , 1977, Journal of Fluid Mechanics.

[11]  Roger D. Kamm,et al.  Unsteady flow in a collapsible tube subjected to external pressure or body forces , 1979, Journal of Fluid Mechanics.

[12]  W. Conrad,et al.  Pressure--flow relationships in collapsible tubes. , 1969, IEEE transactions on bio-medical engineering.

[13]  Y. Tanida,et al.  On the mechanism of Korotkoff sound generation at diastole , 1983, Journal of Fluid Mechanics.

[14]  W. H. Barclay,et al.  Self-excited oscillations in thin-walled collapsible tubes , 1986, Medical and Biological Engineering and Computing.

[15]  O. Tutty.  High-Reynolds-number viscous flow in collapsible tubes , 1984, Journal of Fluid Mechanics.

[16]  D. J. Griffiths.  Steady fluid flow through veins and collapsible tubes , 1971, Medical and biological engineering.

[17]  M Anliker,et al.  The transmission characteristics of large and small pressure waves in the abdominal vena cava. , 1969, IEEE transactions on bio-medical engineering.

[18]  C D Bertram,et al.  A mathematical model of unsteady collapsible tube behaviour. , 1982, Journal of Biomechanics.

[19]  D. M. McQueen,et al.  Steady pressure flow relations in compressed arteries: Possible origin of Korotkoff sounds , 1980, Medical and Biological Engineering and Computing.

[20]  R D Kamm,et al.  Flow in collapsible tubes: a brief review. , 1989, Journal of biomechanical engineering.

[21]  Timothy J. Pedley,et al.  The fluid mechanics of large blood vessels , 1980 .