Unstable equilibrium behaviour in collapsible tubes.

@article{Bertram1986UnstableEB,
  title={Unstable equilibrium behaviour in collapsible tubes.},
  author={Christopher D. Bertram},
  journal={Journal of biomechanics},
  year={1986},
  volume={19 1},
  pages={61-9}
}
Thick-walled silicone rubber tube connected to rigid pipes upstream and downstream was externally pressurised (pe) to cause collapse while aqueous fluid flowed through propelled by a constant upstream head. Three types of equilibrium were found: stable equilibria (steady flow) at high downstream flow resistance R2, self-excited oscillations at low R2, and 'unattainable' (by varying external pressure) or exponentially unstable equilibria at intermediate R2. The self-excited oscillations were… CONTINUE READING

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