What question did this study set out to answer?

This research aims to predict the stability of flow in a channel with a flexible wall segment.

December 10, 2025Journal of Fluid MechanicsOpen Access

Instabilities in collapsible channel flow with a pre-tensioned elastic beam

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Computational analysis reveals hydrodynamic instability in channel flow with pre-tensioned elastic beam, suggesting distinct oscillation modes.

This research aims to predict the stability of flow in a channel with a flexible wall segment.
Utilized a computational method to analyze flow stability in a planar finite-length rigid channel.
Examined the effects of varying external pressures on stability and oscillation modes.
Analyzed different steady states: collapsed and inflated states.
Identified low-frequency self-excited oscillations from a collapsed steady state under large external pressures.
Predicted distinct high-frequency normal modes that arise from both collapsed and inflated states.
Demonstrated that oscillatory modes from an inflated state require a higher driving pressure compared to steady flow.

Wang et al. (2025) studied this question.

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Computational analysis reveals hydrodynamic instability in channel flow with pre-tensioned elastic beam, suggesting distinct oscillation modes.